Maine has earthquakes even though it is not on a plate boundary. So why does Maine have earthquakes and what causes earthquakes in the middle of tectonics plates? Please cite your sources
Sometimes one part of a plate can be traveling at a slightly different speed than another. For example, in the US the western portion of the North American Plate is moving west faster than the eastern. An area of continental crust is being slowly stretched apart in Nevada and parts of California. Such uneven movement can cause buckling and fracturing in the middle of a plate. These will result in mid-plate quakes. A bit rare, but not at all unheard of.
By definition, intraplate earthquakes do not occur near plate boundaries, but along faults in the normally stable interior of plates. These earthquakes often occur at the location of ancient failed rifts, because such old structures may present a weakness in the crust where it can easily slip to accommodate regional tectonic strain.
Geologically (not to mention in other ways), Maine and California are worlds apart. For example, California is at an active boundary between tectonic plates, whereas Maine is in the middle of a large geologic plate. So-called "within-plate" earthquakes are much different from plate boundary earthquakes, primarily because there is no obvious relationship between earthquakes and mapped faults. A fault is a break along which rock has moved. Hundreds of ancient faults have been recognized in the northeast, most related to formation of the Appalachians more than 300 million years ago, and some related to rifting of the continent Pangea to form the modern Atlantic Ocean in the Mesozoic Era. But unlike some faults in California, no Maine faults demonstrate the recurring movement that generates earthquakes. Instead, Maine earthquakes seem to break on a different fault every time, many of which are underground and not mapped. In a general way, the old faults may act as inherited zones of weakness. Even in the Charlevoix Seismic Zone, where a large meteor impact (350 million years ago) and an ancient rift zone have produced many faults, earthquakes are not related in an obvious way to the bedrock structure. The forces that cause our old crust to break may be related to the ongoing slow westward movement of the North American tectonic plate, and to gradual rebound of the underlying mantle after recent melting of the last great ice sheet about 12,000 years ago.
Maine does not have many earthquakes compared with geologically ... none in others, so average frequencies are not very helpful in predicting ... An earthquake is a complex set of ground motions caused by sudden dislocation of rock in the ... center of an earthquake.
Maine does not have many earthquakes compared with geologically active areas, and the ones we have are mostly small. But Maine does have earthquakes. There is a history of continual, low-level activity in the state, with larger ones every once in a while. Hundreds of earthquakes are recorded since 1766, and many more went unrecorded before modern instruments were installed in 1975. The large map to the left shows that most earthquakes since 1814 have been small, many too small to be felt. The pattern is widely scattered, though some regions - easternmost Maine, central Maine, and southwestern Maine - have had somewhat more than other areas. The significance of these diffuse regional clusters remains a mystery. The largest Maine earthquake, felt across New England and southeastern Canada in 1904, was centered in the Eastport area where it toppled some chimneys and caused minor damage to buildings. Several other events since the early 1800's have rattled dishes, broken windows, and caused minor damage, especially to brittle materials like mortar, plaster, and unreinforced concrete. Smaller earthquakes are much more frequent than larger ones. Since 1975, Maine has had about one magnitude 3.0-3.9 earthquake every year, and a magnitude 4 earthquake every 10 to 15 years or so. They occur randomly, with five in some years and none in others, so average frequencies are not very helpful in predicting how many will occur in a particular year. Larger earthquakes are even less frequent, and therefore even less predictable. By one statistical calculation, Maine could get a magnitude 6 earthquake every 300-400 years. Such long time spans make it impossible to understand these larger earthquakeshttp://www.maine.gov/dacf/mgs/pubs/online/quakes/quake11x17.pdf
According to a geologist interviewed by the Bangor Daily News in October, there is no way for scientists to be certain what is going on. The Earth's plates are always moving, and sometimes one collides with another, creating a quake. One hypothesis is that a new fault -- or break -- is forming under Frenchman Bay. There have been three quakes scattered about the bay just off Mount Desert Island, and another quake under Champlain Mountain.
Maine does not have many earthquakes compared with geologically active areas, and the ones we have are mostly small. But Maine does have earthquakes. There is a history of continual, low-level activity in the state, with larger ones every once in a while. Hundreds of earthquakes are recorded since 1766, and many more went unrecorded before modern instruments were installed in 1975. The large map to the left shows that most earthquakes since 1814 have been small, many too small to be felt. The pattern is widely scattered, though some regions - easternmost Maine, central Maine, and southwestern Maine - have had somewhat more than other areas.
The movement of tectonic plates is a complex thing. Plates often don't travel smoothly. There can be a rotational component to their path and sometimes one part of a plate can be traveling at a slightly different speed than another. For example, in the US the western portion of the North American Plate is moving west faster than the eastern. An area of continental crust is being slowly stretched apart in Nevada and parts of California.
Such uneven movement can cause buckling and fracturing in the middle of a plate. These will result in mid-plate quakes. A bit rare, but not at all unheard of. wikipedia.com
Maine earthquakes seem to break on a different fault every time, many of which are underground and not mapped. In a general way, the old faults may act as inherited zones of weakness. http://www.maine.gov/dacf/mgs/pubs/online/quakes/quake11x17.pdf
he movement of tectonic plates is a complex thing. Plates often don't travel smoothly. There can be a rotational component to their path and sometimes one part of a plate can be traveling at a slightly different speed than another. For example, in the US the western portion of the North American Plate is moving west faster than the eastern. An area of continental crust is being slowly stretched apart in Nevada and parts of California. https://answers.yahoo.com/question/index?qid=20100208170231AAWxPrK
definition, intraplate earthquakes do not occur near plate boundaries, but along faults in the normally stable interior of plates. These earthquakes often occur at the location of ancient failed rifts, because such old structures may present a weakness in the crust where it can easily slip to accommodate regional tectonic strain.
Maine does not have many earthquakes compared with geologically active areas, and the ones we have are mostly small. But Maine does have earthquakes. There is a history of continual, low-level activity in the state, with larger ones every once in a while. Hundreds of earthquakes are recorded since 1766, and many more went unrecorded before modern instruments were installed in 1975. The large map to the left shows that most earthquakes since 1814 have been small, many too small to be felt. The pattern is widely scattered, though some regions - easternmost Maine, central Maine, and southwestern Maine - have had somewhat more than other areas. The significance of these diffuse regional clusters remains a mystery. The largest Maine earthquake, felt across New England and southeastern Canada in 1904, was centered in the Eastport area where it toppled some chimneys and caused minor damage to buildings. Several other events since the early 1800's have rattled dishes, broken windows, and caused minor damage, especially to brittle materials like mortar, plaster, and unreinforced concrete. Smaller earthquakes are much more frequent than larger ones. Since 1975, Maine has had about one magnitude 3.0-3.9 earthquake every year, and a magnitude 4 earthquake every 10 to 15 years or so. They occur randomly, with five in some years and none in others, so average frequencies are not very helpful in predicting how many will occur in a particular year. Larger earthquakes are even less frequent, and therefore even less predictable. By one statistical calculation, Maine could get a magnitude 6 earthquake every 300-400 years. Such long time spans make it impossible to understand these larger earthquakes.
According to a geologist interviewed by the Bangor Daily News in October, there is no way for scientists to be certain what is going on. The Earth's plates are always moving, and sometimes one collides with another, creating a quake. One hypothesis is that a new fault -- or break -- is forming under Frenchman Bay. There have been three quakes scattered about the bay just off Mount Desert Island, and another quake under Champlain Mountain.
my sources this site https://answers.yahoo.com/question/index?qid=20061218131150AAS0ueT
At the present time, a commonly accepted explanation for the cause of earthquakes in the Northeast is that "ancient zones of weakness" are being reactivated in the present-day stress field. In this model, preexisting faults and/or other geological features formed during ancient geological episodes persist in the intraplate crust, and, by way of analogy with plate boundary seismicity, earthquakes occur when the present-day stress is released along these zones of weakness. Using this model as a guide, much of the research on northeastern US earthquakes has involved attempts to identify preexisting faults and other geological features that might be reactivated by the present-day stress field. While this concept of reactivation of old zones of weakness is commonly assumed to be valid, in reality the identification of individual active geologic features has proven to be quite difficult. Unlike the situation for many plate boundary earthquakes, it is not at all clear whether faults mapped at the earth's surface in the Northeast are the same faults along which the earthquakes are occurring.
Earthquakes in Maine have been relatively mild since the reported “big one” on November 18, 1755, which was felt widely across New England and did great damage in Massachusetts. On April 20, 2002 people in Maine felt their houses shaking at 6:50 a.m. when a quake measuring 5.1 on the Richter scale struck, the strongest in the Adirondack region since 1983.
Earthquakes in Maine, Maine Geological Survey Earthquakes in Maine, Maine Geological Survey Maine has historically had a low but steady rate of earthquakes. According to the Maine Geological Survey, “No significant amount of motion has been shown for any fault since the last Ice Age, about 20,000 years ago, and geologic evidence demonstrates that many faults have been inactive since the formation of the Appalachians, over 300,000,000 years ago.” http://maineanencyclopedia.com/earthquakes/
By definition, intraplate earthquakes do not occur near plate boundaries, but along faults in the normally stable interior of plates. These earthquakes often occur at the location of ancient failed rifts, because such old structures may present a weakness in the crust where it can easily slip to accommodate regional tectonic strain.
Earthquakes typically do not occur in the middle of tectonic plates. Earthquakes are mostly caused by 2 tectonic plates colliding into or sliding past each other, resulting in friction that causes earthquakes. However, there are no such tectonic activity going on in the middle of tectonic plates.
These Earthquakes are called Intraplate Earthquakes. They occur because "Many cities live with the seismic risk of a rare, large intraplate earthquake. The cause of these earthquakes is often uncertain. In many cases, the causative fault is deeply buried, and sometimes cannot even be found. Under these circumstances it is difficult to calculate the exact seismic hazard for a given city, especially if there was only one earthquake in historical times. Some progress is being made in understanding the fault mechanics driving these earthquakes." ~Wikipedia
Maine does not have many earthquakes compared with geologically active areas, and the ones we have are mostly small. But Maine does have earthquakes. There is a history of continual, low-level activity in the state, with larger ones every once in a while.
The honest answer is that we don't fully understand the source of the underground forces that cause earthquakes in eastern North America. There must be some amount of regional stress distributed through the North American crust that causes rock somewhere to give way occasionally. Geologists and geophysicists have some hypotheses about the origin of the regional stress field, but no consensus has emerged. A nice article, "Why Does the Earth Quake in New England?", written by Prof. Alan Kafka of Weston Observatory, discusses this topic.
Geologically (not to mention in other ways), Maine and California are worlds apart. For example, California is at an active boundary between tectonic plates, whereas Maine is in the middle of a large geologic plate. So-called "within-plate" earthquakes are much different from plate boundary earthquakes, primarily because there is no obvious relationship between earthquakes and mapped faults. A fault is a break along which rock has moved. Hundreds of ancient faults have been recognized in the northeast, most related to formation of the Appalachians more than 300 million years ago, and some related to rifting of the continent Pangea to form the modern Atlantic Ocean in the Mesozoic Era. But unlike some faults in California, no Maine faults demonstrate the recurring movement that generates earthquakes. Instead, Maine earthquakes seem to break on a different fault every time, many of which are underground and not mapped. In a general way, the old faults may act as inherited zones of weakness. Even in the Charlevoix Seismic Zone, where a large meteor impact (350 million years ago) and an ancient rift zone have produced many faults, earthquakes are not related in an obvious way to the bedrock structure.
The honest answer is that we don't fully understand the source of the underground forces that cause earthquakes in eastern North America. There must be some amount of regional stress distributed through the North American crust that causes rock somewhere to give way occasionally. Geologists and geophysicists have some hypotheses about the origin of the regional stress field, but no consensus has emerged. A nice article, "Why Does the Earth Quake in New England?", written by Prof. Alan Kafka of Weston Observatory, discusses this topic.
I also got my info from http://www.maine.gov/dacf/mgs/hazards/earthquakes/quake-faq.htm
Maine's plates are aways shifting and moving and sometimes they collied, creating an earthquake, though it isn't as strong as the earthquakes in California.
The honest answer is that we don't fully understand the source of the underground forces that cause earthquakes in eastern North America. Geologists and geophysicists have some hypotheses about the origin of the regional stress field, but no consensus has emerged.
Maine has earthquakes far away from plate is something we can not fully understand but there are many hypothesis on this subject on written by someone at Boston college that does not only cover earthquakes in Maine but in new England but they still have the answers you are looking for in the article.Here is the link:https://www2.bc.edu/~kafka/Why_Quakes/why_quakes.html
An intraplate earthquake is an earthquake that occurs in the interior of a tectonic plate, whereas an interplate earthquake is one that occurs at a plate boundary.
An intraplate earthquake is an earthquake that occurs in the interior of a tectonic plate, whereas an interplate earthquake is one that occurs at a plate boundary.
The reason is because there are faults all around the world and when they slip the world shakes, even in the middle of the plate.-info from https://answers.yahoo.com/question/index?qid=20121016173748AAeGY4o
It is called an intraplate earthquake, where an earthquake occurs at the interior of a plate. This happens because Maine is near a rift zone, for example, New Madris is near a rift zone and they have very violent earthquakes.
Maine has earthquakes because of the extra plate being subducted under our plate an when it moves it causes small earthquakes. Intraplate earthquakes happen when fault lines in the plate snap.
How well then does this pre-existing zones of weakness model work in the northeastern United States? Like all other parts of the Earth, the bedrock of New England and adjacent areas has been affected by many episodes of geological activity, each lasting many millions of years. Geological features (including ancient faults) that are "scars" of these geological episodes are found throughout New England and adjacent areas; nonetheless, it has been hard to find any unequivocal relationship between these geological features and seismicity in this area.
Maine does not have many earthquakes compared with geologically active areas, and the ones we have are mostly small. But Maine does have earthquakes. There is a history of continual, low-level activity in the state, with larger ones every once in a while. Hundreds of earthquakes are recorded since 1766, and many more went unrecorded before modern instruments were installed in 1975. The large map to the left shows that most earthquakes since 1814 have been small, many too small to be felt. The pattern is widely scattered, though some regions - easternmost Maine, central Maine, and southwestern Maine - have had somewhat more than other areas. The significance of these diffuse regional clusters remains a mystery. The largest Maine earthquake, felt across New England and southeastern Canada in 1904, was centered in the Eastport area where it toppled some chimneys and caused minor damage to buildings. Several other events since the early 1800's have rattled dishes, broken windows, and caused minor damage, especially to brittle materials like mortar, plaster, and unreinforced concrete
Maine does not have many earthquakes compared with geologically active areas, and the ones we have are mostly small. But Maine does have earthquakes. There is a history of continual, low-level activity in the state, with larger ones every once in a while. Hundreds of earthquakes are recorded since 1766, and many more went unrecorded before modern instruments were installed in 1975. The large map to the left shows that most earthquakes since 1814 have been small, many too small to be felt. The pattern is widely scattered, though some regions - easternmost Maine, central Maine, and southwestern Maine - have had somewhat more than other areas. The significance of these diffuse regional clusters remains a mystery. The largest Maine earthquake, felt across New England and southeastern Canada in 1904, was centered in the Eastport area where it toppled some chimneys and caused minor damage to buildings. Several other events since the early 1800's have rattled dishes, broken windows, and caused minor damage, especially to brittle materials like mortar, plaster, and unreinforced concrete
This comment has been removed by a blog administrator.
ReplyDeleteSometimes one part of a plate can be traveling at a slightly different speed than another. For example, in the US the western portion of the North American Plate is moving west faster than the eastern. An area of continental crust is being slowly stretched apart in Nevada and parts of California. Such uneven movement can cause buckling and fracturing in the middle of a plate. These will result in mid-plate quakes. A bit rare, but not at all unheard of.
ReplyDeletehttps://answers.yahoo.com/question/index?qid=20100208170231AAWxPrK
By definition, intraplate earthquakes do not occur near plate boundaries, but along faults in the normally stable interior of plates. These earthquakes often occur at the location of ancient failed rifts, because such old structures may present a weakness in the crust where it can easily slip to accommodate regional tectonic strain.
ReplyDeletehttp://en.wikipedia.org/wiki/Intraplate_earthquake
Geologically (not to mention in other
ReplyDeleteways), Maine and California are worlds apart.
For example, California is at an active
boundary between tectonic plates, whereas
Maine is in the middle of a large geologic
plate. So-called "within-plate" earthquakes
are much different from plate boundary
earthquakes, primarily because there is no
obvious relationship between earthquakes and
mapped faults. A fault is a break along which
rock has moved. Hundreds of ancient faults
have been recognized in the northeast, most
related to formation of the Appalachians more
than 300 million years ago, and some related
to rifting of the continent Pangea to form the
modern Atlantic Ocean in the Mesozoic Era.
But unlike some faults in California, no Maine
faults demonstrate the recurring movement
that generates earthquakes. Instead, Maine
earthquakes seem to break on a different fault
every time, many of which are underground
and not mapped. In a general way, the old
faults may act as inherited zones of weakness.
Even in the Charlevoix Seismic Zone, where a
large meteor impact (350 million years ago)
and an ancient rift zone have produced many
faults, earthquakes are not related in an
obvious way to the bedrock structure.
The forces that cause our old crust to
break may be related to the ongoing slow
westward movement of the North American
tectonic plate, and to gradual rebound of the
underlying mantle after recent melting of the
last great ice sheet about 12,000 years ago.
http://www.maine.gov/dacf/mgs/pubs/online/quakes/quake11x17.pdf
Maine does not have many earthquakes compared with geologically ... none in others, so average frequencies are not very helpful in predicting ... An earthquake is a complex set of ground motions caused by sudden dislocation of rock in the ... center of an earthquake.
ReplyDeleteMaine does not have many earthquakes compared with
ReplyDeletegeologically active areas, and the ones we have are mostly small.
But Maine does have earthquakes. There is a history of
continual, low-level activity in the state, with larger ones every
once in a while. Hundreds of earthquakes are recorded since
1766, and many more went unrecorded before modern
instruments were installed in 1975. The large map to the left
shows that most earthquakes since 1814 have been small, many
too small to be felt. The pattern is widely scattered, though some
regions - easternmost Maine, central Maine, and southwestern
Maine - have had somewhat more than other areas. The
significance of these diffuse regional clusters remains a mystery.
The largest Maine earthquake, felt across New England
and southeastern Canada in 1904, was centered in the Eastport
area where it toppled some chimneys and caused minor damage
to buildings. Several other events since the early 1800's have
rattled dishes, broken windows, and caused minor damage,
especially to brittle materials like mortar, plaster, and
unreinforced concrete.
Smaller earthquakes are much more frequent than larger
ones. Since 1975, Maine has had about one magnitude 3.0-3.9
earthquake every year, and a magnitude 4 earthquake every 10 to
15 years or so. They occur randomly, with five in some years and
none in others, so average frequencies are not very helpful in
predicting how many will occur in a particular year. Larger
earthquakes are even less frequent, and therefore even less
predictable. By one statistical calculation, Maine could get a
magnitude 6 earthquake every 300-400 years. Such long time
spans make it impossible to understand these larger earthquakeshttp://www.maine.gov/dacf/mgs/pubs/online/quakes/quake11x17.pdf
According to a geologist interviewed by the Bangor Daily News in October, there is no way for scientists to be certain what is going on. The Earth's plates are always moving, and sometimes one collides with another, creating a quake. One hypothesis is that a new fault -- or break -- is forming under Frenchman Bay. There have been three quakes scattered about the bay just off Mount Desert Island, and another quake under Champlain Mountain.
ReplyDeletehttps://answers.yahoo.com/question/index?qid=20061218131150AAS0ueT
This comment has been removed by a blog administrator.
ReplyDeleteThis comment has been removed by a blog administrator.
ReplyDeleteMaine does not have many earthquakes compared with geologically active areas, and the ones we have are mostly small. But Maine does have earthquakes. There is a history of continual, low-level activity in the state, with larger ones every once in a while. Hundreds of earthquakes are recorded since 1766, and many more went unrecorded before modern instruments were installed in 1975. The large map to the left shows that most earthquakes since 1814 have been small, many too small to be felt. The pattern is widely scattered, though some regions - easternmost Maine, central Maine, and southwestern Maine - have had somewhat more than other areas.
ReplyDeletehttp://www.maine.gov/dacf/mgs/pubs/online/quakes/quake11x17.pdf
The movement of tectonic plates is a complex thing. Plates often don't travel smoothly. There can be a rotational component to their path and sometimes one part of a plate can be traveling at a slightly different speed than another. For example, in the US the western portion of the North American Plate is moving west faster than the eastern. An area of continental crust is being slowly stretched apart in Nevada and parts of California.
ReplyDeleteSuch uneven movement can cause buckling and fracturing in the middle of a plate. These will result in mid-plate quakes. A bit rare, but not at all unheard of.
wikipedia.com
This comment has been removed by a blog administrator.
ReplyDeleteThis comment has been removed by a blog administrator.
ReplyDeletethis is wrong
DeleteMaine
ReplyDeleteearthquakes seem to break on a different fault
every time, many of which are underground
and not mapped. In a general way, the old
faults may act as inherited zones of weakness.
http://www.maine.gov/dacf/mgs/pubs/online/quakes/quake11x17.pdf
he movement of tectonic plates is a complex thing. Plates often don't travel smoothly. There can be a rotational component to their path and sometimes one part of a plate can be traveling at a slightly different speed than another. For example, in the US the western portion of the North American Plate is moving west faster than the eastern. An area of continental crust is being slowly stretched apart in Nevada and parts of California.
https://answers.yahoo.com/question/index?qid=20100208170231AAWxPrK
definition, intraplate earthquakes do not occur near plate boundaries, but along faults in the normally stable interior of plates. These earthquakes often occur at the location of ancient failed rifts, because such old structures may present a weakness in the crust where it can easily slip to accommodate regional tectonic strain.
ReplyDeletehttp://en.wikipedia.org/wiki/Intraplate_earthquake
Maine has earthquakes even though it isn't on a plate boundry because its on faults instead.
ReplyDeletelocated is suppose to go before on
DeleteMaine does not have many earthquakes compared with
ReplyDeletegeologically active areas, and the ones we have are mostly small.
But Maine does have earthquakes. There is a history of
continual, low-level activity in the state, with larger ones every
once in a while. Hundreds of earthquakes are recorded since
1766, and many more went unrecorded before modern
instruments were installed in 1975. The large map to the left
shows that most earthquakes since 1814 have been small, many
too small to be felt. The pattern is widely scattered, though some
regions - easternmost Maine, central Maine, and southwestern
Maine - have had somewhat more than other areas. The
significance of these diffuse regional clusters remains a mystery.
The largest Maine earthquake, felt across New England
and southeastern Canada in 1904, was centered in the Eastport
area where it toppled some chimneys and caused minor damage
to buildings. Several other events since the early 1800's have
rattled dishes, broken windows, and caused minor damage,
especially to brittle materials like mortar, plaster, and
unreinforced concrete.
Smaller earthquakes are much more frequent than larger
ones. Since 1975, Maine has had about one magnitude 3.0-3.9
earthquake every year, and a magnitude 4 earthquake every 10 to
15 years or so. They occur randomly, with five in some years and
none in others, so average frequencies are not very helpful in
predicting how many will occur in a particular year. Larger
earthquakes are even less frequent, and therefore even less
predictable. By one statistical calculation, Maine could get a
magnitude 6 earthquake every 300-400 years. Such long time
spans make it impossible to understand these larger earthquakes.
www.maine.gov
This comment has been removed by the author.
ReplyDeleteAccording to a geologist interviewed by the Bangor Daily News in October, there is no way for scientists to be certain what is going on. The Earth's plates are always moving, and sometimes one collides with another, creating a quake. One hypothesis is that a new fault -- or break -- is forming under Frenchman Bay. There have been three quakes scattered about the bay just off Mount Desert Island, and another quake under Champlain Mountain.
ReplyDeletemy sources this site
https://answers.yahoo.com/question/index?qid=20061218131150AAS0ueT
At the present time, a commonly accepted explanation for the cause of earthquakes in the Northeast is that "ancient zones of weakness" are being reactivated in the present-day stress field. In this model, preexisting faults and/or other geological features formed during ancient geological episodes persist in the intraplate crust, and, by way of analogy with plate boundary seismicity, earthquakes occur when the present-day stress is released along these zones of weakness. Using this model as a guide, much of the research on northeastern US earthquakes has involved attempts to identify preexisting faults and other geological features that might be reactivated by the present-day stress field. While this concept of reactivation of old zones of weakness is commonly assumed to be valid, in reality the identification of individual active geologic features has proven to be quite difficult. Unlike the situation for many plate boundary earthquakes, it is not at all clear whether faults mapped at the earth's surface in the Northeast are the same faults along which the earthquakes are occurring.
ReplyDeletehttps://www2.bc.edu/~kafka/Why_Quakes/why_quakes.html
This comment has been removed by a blog administrator.
ReplyDeleteEarthquakes
ReplyDeletein Maine have been relatively mild since the reported “big one” on November 18, 1755, which was felt widely across New England and did great damage in Massachusetts. On April 20, 2002 people in Maine felt their houses shaking at 6:50 a.m. when a quake measuring 5.1 on the Richter scale struck, the strongest in the Adirondack region since 1983.
Earthquakes in Maine, Maine Geological Survey
Earthquakes in Maine, Maine Geological Survey
Maine has historically had a low but steady rate of earthquakes. According to the Maine Geological Survey, “No significant amount of motion has been shown for any fault since the last Ice Age, about 20,000 years ago, and geologic evidence demonstrates that many faults have been inactive since the formation of the Appalachians, over 300,000,000 years ago.” http://maineanencyclopedia.com/earthquakes/
This comment has been removed by a blog administrator.
ReplyDeleteBy definition, intraplate earthquakes do not occur near plate boundaries, but along faults in the normally stable interior of plates. These earthquakes often occur at the location of ancient failed rifts, because such old structures may present a weakness in the crust where it can easily slip to accommodate regional tectonic strain.
ReplyDeletehttp://en.wikipedia.org/wiki/Intraplate_earthquake
This comment has been removed by a blog administrator.
ReplyDeleteMaine has Earthquakes because of Faults that have so much built up pressure, that the elastic limit is reached, and it causes an earthquake.
ReplyDeleteThis comment has been removed by a blog administrator.
ReplyDeleteThis comment has been removed by a blog administrator.
ReplyDeleteEarthquakes typically do not occur in the middle of tectonic plates. Earthquakes are mostly caused by 2 tectonic plates colliding into or sliding past each other, resulting in friction that causes earthquakes. However, there are no such tectonic activity going on in the middle of tectonic plates.
ReplyDeleteThis comment has been removed by a blog administrator.
ReplyDeleteThese Earthquakes are called Intraplate Earthquakes. They occur because "Many cities live with the seismic risk of a rare, large intraplate earthquake. The cause of these earthquakes is often uncertain. In many cases, the causative fault is deeply buried, and sometimes cannot even be found. Under these circumstances it is difficult to calculate the exact seismic hazard for a given city, especially if there was only one earthquake in historical times. Some progress is being made in understanding the fault mechanics driving these earthquakes." ~Wikipedia
ReplyDeleteMaine does not have many earthquakes compared with
ReplyDeletegeologically active areas, and the ones we have are mostly small.
But Maine does have earthquakes. There is a history of
continual, low-level activity in the state, with larger ones every
once in a while.
http://www.maine.gov/dacf/mgs/pubs/online/quakes/quake11x17.pdf
DeleteMaybe our earthquakes are after shocks from the plates, but the after shocks are huge and form an earthquake!
ReplyDeleteI got this answer from my mind
This comment has been removed by a blog administrator.
ReplyDeleteMaine has small but i has earthquakes http://www.maine.gov/portal/index.html
ReplyDeleteThe honest answer is that we don't fully understand the source of the underground forces that cause earthquakes in eastern North America. There must be some amount of regional stress distributed through the North American crust that causes rock somewhere to give way occasionally. Geologists and geophysicists have some hypotheses about the origin of the regional stress field, but no consensus has emerged. A nice article, "Why Does the Earth Quake in New England?", written by Prof. Alan Kafka of Weston Observatory, discusses this topic.
ReplyDeletehttp://www.maine.gov/dacf/mgs/hazards/earthquakes/quake-faq.htm
There is sometimes tectonic activity in the middle of he plates and other earthquakes happen in different places and we can still can feel it.
ReplyDeleteGeologically (not to mention in other ways), Maine and California are worlds apart. For example, California is at an active boundary between tectonic plates, whereas Maine is in the middle of a large geologic plate. So-called "within-plate" earthquakes are much different from plate boundary earthquakes, primarily because there is no obvious relationship between earthquakes and
ReplyDeletemapped faults. A fault is a break along which rock has moved. Hundreds of ancient faults have been recognized in the northeast, most related to formation of the Appalachians more than 300 million years ago, and some related to rifting of the continent Pangea to form the modern Atlantic Ocean in the Mesozoic Era. But unlike some faults in California, no Maine faults demonstrate the recurring movement that generates earthquakes. Instead, Maine earthquakes seem to break on a different fault every time, many of which are underground
and not mapped. In a general way, the old faults may act as inherited zones of weakness. Even in the Charlevoix Seismic Zone, where a large meteor impact (350 million years ago) and an ancient rift zone have produced many faults, earthquakes are not related in an obvious way to the bedrock structure.
http://www.maine.gov/dacf/mgs/pubs/online/quakes/quake11x17.pdf
We have earthquakes but nobody really understands why they happen.
ReplyDeletehttp://www.maine.gov/dacf/mgs/hazards/earthquakes/quake-faq.htm
The honest answer is that we don't fully understand the source of the underground forces that cause earthquakes in eastern North America. There must be some amount of regional stress distributed through the North American crust that causes rock somewhere to give way occasionally. Geologists and geophysicists have some hypotheses about the origin of the regional stress field, but no consensus has emerged. A nice article, "Why Does the Earth Quake in New England?", written by Prof. Alan Kafka of Weston Observatory, discusses this topic.
ReplyDeleteI also got my info from http://www.maine.gov/dacf/mgs/hazards/earthquakes/quake-faq.htm
Maine's plates are aways shifting and moving and sometimes they collied, creating an earthquake, though it isn't as strong as the earthquakes in California.
ReplyDeleteThe honest answer is that we don't fully understand the source of the underground forces that cause earthquakes in eastern North America. Geologists and geophysicists have some hypotheses about the origin of the regional stress field, but no consensus has emerged.
ReplyDeletehttp://www.maine.gov/dacf/mgs/hazards/earthquakes/quake-faq.htm
Maine has earthquakes far away from plate is something we can not fully understand but there are many hypothesis on this subject on written by someone at Boston college that does not only cover earthquakes in Maine but in new England but they still have the answers you are looking for in the article.Here is the link:https://www2.bc.edu/~kafka/Why_Quakes/why_quakes.html
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ReplyDeleteMaine has earthquakes because it is on a plate and if the plates hit hard the hole plate will shake.
ReplyDeleteAn intraplate earthquake is an earthquake that occurs in the interior of a tectonic plate, whereas an interplate earthquake is one that occurs at a plate boundary.
ReplyDeletehttp://en.wikipedia.org/wiki/Intraplate_earthquake
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ReplyDeleteAn intraplate earthquake is an earthquake that occurs in the interior of a tectonic plate, whereas an interplate earthquake is one that occurs at a plate boundary.
ReplyDeletehttp://en.wikipedia.org/wiki/Intraplate_earthquake
A hypothesis for the idea of Maine has earthquakes is from intraplates, earthquakes that happen in the interior of a tectonic plate.
ReplyDeleteVia:http://en.wikipedia.org/wiki/Intraplate_earthquake
The reason is because there are faults all around the world and when they slip the world shakes, even in the middle of the plate.-info from https://answers.yahoo.com/question/index?qid=20121016173748AAeGY4o
ReplyDeleteThis one was weird
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ReplyDeleteThe reason is because there are faults all around the world and when they slip the world shakes, even in the middle of the plate.
ReplyDelete.-info from https://answers.yahoo.com/question/index?qid=20121016173748AAeGY4o
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ReplyDeleteit is because of the land vibrates
ReplyDeleteIt is called an intraplate earthquake, where an earthquake occurs at the interior of a plate. This happens because Maine is near a rift zone, for example, New Madris is near a rift zone and they have very violent earthquakes.
ReplyDeleteA combination of tiny faults and an ice age hangover caused Maine's swarm of tiny earthquakes.
ReplyDeletehttp://www.livescience.com/30431-maine-tiny-earthquakes-explained-110512.html
Maine earthquakes are along underground, unmapped faults. http://www.maine.gov/dacf/mgs/pubs/online/quakes/quake11x17.pdf
ReplyDeleteMaine has earthquakes because of the extra plate being subducted under our plate an when it moves it causes small earthquakes. Intraplate earthquakes happen when fault lines in the plate snap.
ReplyDeleteSOURCES:
Mr. Ruby
http://earthscience.stackexchange.com/questions/676/what-causes-intra-plate-faults-such-as-the-new-madrid-fault
How well then does this pre-existing zones of weakness model work in the northeastern United States? Like all other parts of the Earth, the bedrock of New England and adjacent areas has been affected by many episodes of geological activity, each lasting many millions of years. Geological features (including ancient faults) that are "scars" of these geological episodes are found throughout New England and adjacent areas; nonetheless, it has been hard to find any unequivocal relationship between these geological features and seismicity in this area.
ReplyDeleteBecause there can be faults in the middle of tectonic plates.
ReplyDeletehttp://en.wikipedia.org/wiki/Intraplate_earthquake
Deletehttps://www2.bc.edu/~kafka/Why_Quakes/why_quakes.html
ReplyDeleteA combination of tiny faults and an ice age hangover caused Maine's swarm of tiny earthquakes.
ReplyDeletehttp://www.livescience.com/30431-maine-tiny-earthquakes-explained-110512.html
Faults slip even in the middle of plates.
ReplyDeletehttps://answers.yahoo.com/question/index?qid=20121016173748AAeGY4o
It is called an intraplate earthquake
ReplyDeletehttp://www.livescience.com/24058-maine-earthquake-facts.html
ReplyDeleteMaine does not have many earthquakes compared with
ReplyDeletegeologically active areas, and the ones we have are mostly small.
But Maine does have earthquakes. There is a history of
continual, low-level activity in the state, with larger ones every
once in a while. Hundreds of earthquakes are recorded since
1766, and many more went unrecorded before modern
instruments were installed in 1975. The large map to the left
shows that most earthquakes since 1814 have been small, many
too small to be felt. The pattern is widely scattered, though some
regions - easternmost Maine, central Maine, and southwestern
Maine - have had somewhat more than other areas. The
significance of these diffuse regional clusters remains a mystery.
The largest Maine earthquake, felt across New England
and southeastern Canada in 1904, was centered in the Eastport
area where it toppled some chimneys and caused minor damage
to buildings. Several other events since the early 1800's have
rattled dishes, broken windows, and caused minor damage,
especially to brittle materials like mortar, plaster, and
unreinforced concrete
http://www.maine.gov/dacf/mgs/pubs/online/quakes/quake11x17.pdf
Maine does not have many earthquakes compared with
ReplyDeletegeologically active areas, and the ones we have are mostly small.
But Maine does have earthquakes. There is a history of
continual, low-level activity in the state, with larger ones every
once in a while. Hundreds of earthquakes are recorded since
1766, and many more went unrecorded before modern
instruments were installed in 1975. The large map to the left
shows that most earthquakes since 1814 have been small, many
too small to be felt. The pattern is widely scattered, though some
regions - easternmost Maine, central Maine, and southwestern
Maine - have had somewhat more than other areas. The
significance of these diffuse regional clusters remains a mystery.
The largest Maine earthquake, felt across New England
and southeastern Canada in 1904, was centered in the Eastport
area where it toppled some chimneys and caused minor damage
to buildings. Several other events since the early 1800's have
rattled dishes, broken windows, and caused minor damage,
especially to brittle materials like mortar, plaster, and
unreinforced concrete
http://www.maine.gov/dacf/mgs/pubs/online/quakes/quake11x17.pdf