Monday, October 21, 2013

October 22 2013 Earthquakes

What is a earthquake? 

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63 comments:

Rylan N said...

when the earth shakes because plates hit eachother

Mya N said...

An earthquake is when the plates underground rub together.

Casey K said...

Its movements within earth's crust , or volcanic action

Jack D said...

Have you ever assured someone that your friend is reliable by saying that he or she "has both feet on the ground"? The fact that such a phrase exists shows how much comfort we take in the idea that the ground beneath our feet is unmoving, unchanging and dependable. Indeed, much of our civilization, from our houses and buildings to our energy, food and water sources, depends on unmoving earth.
In truth, however, our planet's seemingly stable surface is made up of enormous pieces of rock that are slowly but constantly moving. Those pieces continually collide with and rub against one another, and sometimes their edges abruptly crack or slip and suddenly release huge amounts of pent-up energy. These unsettling events are called earthquakes, and small ones happen across the planet every day, without people even noticing. But every so often, a big earthquake occurs, and when that happens, the pulses of energy it releases, called seismic waves, can wreak almost unfathomable destruction and kill and injure many thousands of people [source: Bolt].
That sort of cataclysm occurred on March 11, 2011, in Japan, when a massive quake, later estimated by Japanese Meteorological Agency to be 9.0 in magnitude, struck 81 miles (130 kilometers) east of the city of Sendai on the nation's northeastern coast. The forces of the quake, the fifth most powerful in the past century, set off a giant wave, called a tsunami, that engulfed villages, destroyed buildings and drowned and crushed people who lived there [source: Green]. The earthquake and tsunami also badly damaged a six-reactor nuclear power plant in Fukushima, 150 miles (241 kilometers) north of Tokyo, destroying the backup generators that powered its cooling systems and causing a dangerous release of radiation that forced people in the region to flee. In all, the quake claimed the lives of 20,896 people, according to the U.S. Geological Survey.
Though earthquakes have terrorized people since ancient times, it's only been in the past 100 years that scientists have come to understand what causes them, and to develop technology to detect their origin and measure their magnitude. In addition, engineers and architects have worked to make buildings more resistant to earthquake shocks. Someday, researchers hope to find a way to predict earthquakes in advance, and perhaps even control them.
In this article, we'll give you the latest scientific knowledge about earthquakes, and discuss how humans can cope with them. But first, here are some basic earthquake facts.
http://science.howstuffworks.com/nature/natural-disasters/earthquake.htm

Katie N. said...

A sudden movement of the earth's crust caused by the release of stress accumulated along geologic faults or by volcanic activity. Also called seism, temblor.

Tyler J said...

When earths plates move hit each other thats what a earthquakes are.

Mercedes C. said...

a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.

Evan L said...

Its when the plates grind together and they make the earth shake.

Anonymous said...

n truth, however, our planet's seemingly stable surface is made up of enormous pieces of rock that are slowly but constantly moving. Those pieces continually collide with and rub against one another, and sometimes their edges abruptly crack or slip and suddenly release huge amounts of pent-up energy. These unsettling events are called earthquakes, and small ones happen across the planet every day, without people even noticing. But every so often, a big earthquake occurs, and when that happens, the pulses of energy it releases, called seismic waves, can wreak almost unfathomable destruction and kill and injure many thousands of people [source: Bolt].




http://science.howstuffworks.com/nature/natural-disasters/earthquake.htm

Taylor J said...

An earthquake is what happens when two blocks of the earth suddenly slip past one another. The surface where they slip is called the fault or fault plane. The location below the earth’s surface where the earthquake starts is called the hypocenter, and the location directly above it on the surface of the earth is called the epicenter.

Sometimes an earthquake has foreshocks. These are smaller earthquakes that happen in the same place as the larger earthquake that follows. Scientists can’t tell that an earthquake is a foreshock until the larger earthquake happens. The largest, main earthquake is called the mainshock. Mainshocks always have aftershocks that follow. These are smaller earthquakes that occur afterwards in the same place as the mainshock. Depending on the size of the mainshock, aftershocks can continue for weeks, months, and even years after the mainshock!


http://earthquake.usgs.gov/learn/kids/eqscience.php

Griffin M. said...

Its when the plates underground shift and overlap and cause the Earth to rumble.

Wyatt R said...

Its when plates in the earth shift and grind together, when this happens it makes the ground shake and sometimes cause major destruction.

Leslie K said...

an earthquake bunch of pent of energy that is released when plates crack or slip

Lauren B. said...

An Earthquake is the vibration when the rock's buildup energy. To relive the pressure or energy they stretch, bend, and may even break. The Earth will then split the Earth.

Mr Ruby said...

Good source Taylor

Noah R said...

An earthquake is vibration from the movement of Earth's plates.

Erin W said...

An earthquake is 2 plates in the ground crashing together causing the ground to shake.

Sadie F. said...

An earthquake is caused by a sudden slip on a fault. The tectonic plates are always slowly moving, but they get stuck at their edges due to friction. When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust and cause the shaking that we feel.

http://www.openhazards.com/faq/earthquakes-faults-plate-tectonics-earth-structure/what-earthquake-and-what-causes-them-happen

Jacob G said...

An earthquake is the shaking of the ground caused by the earths plate.

Anonymous said...

An earthquake is when the plates of Earth collide and shift

Amber R said...

An earthquake is when the earth shakes because two of the earths plates hit each other.

Julia M said...

An Earthquake is two or more plates in the Earth scraping against each other, causing the ground to shake.

Blaze H said...

An earthquake is caused by a sudden slip on a fault. The tectonic plates are always slowly moving, but they get stuck at their edges due to friction. When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust and cause the shaking that we feel.

Kaylee H. said...

An Earthquake is the vibration when the rock's buildup energy. To relive the pressure or energy they stretch, bend, and may even break. The Earth will then split the Earth.

Sydney G said...

An earthquake is when the earths plates, slowly collide, forming shaking of the earth.

Ella T. said...

An earthquake is a natural disaster caused by Earth that makes the ground shake. Earthquakes happen when 2 of earth's plates grind against each other or are caused by volcanic action.

Lauren S said...

When the earth shakes because plates hit each other.

Anonymous said...

celia d i am not sure

TylerW said...

An earthquake is caused by a sudden slip on a fault. The tectonic plates are always slowly moving, but they get stuck at their edges due to friction. When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust and cause the shaking that we feel.

Caitlin B said...

A earthquake is caused when the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust and cause the shaking that we feel.

Taylor V said...

An earthquake is caused by a sudden slip on a fault. The tectonic plates are always slowly moving, but they get stuck at their edges due to friction. When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust and cause the shaking that we feel.

Cassie M said...

An earthquake is caused by a sudden slip on a fault. The tectonic plates are always slowly moving, but they get stuck at their edges due to friction. When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust and cause the shaking that we

Anonymous said...

An earthquake is when pressure plats hit together.
loganm

Anonymous said...

Its when plates in the earth shift and grind together, when this happens it makes the ground shake and sometimes cause major destruction.

Adrian K said...

An earthquake is when tectonic plates in the ground move.

Sophia S said...

An earthquake is when the tectonic plates in earth shift from to much energy stored up in the rock much like a elastic rubber band snapping from to much pressure applied to a rock.

Alysse S said...

An earthquake is caused by a sudden slip on a fault. The tectonic plates are always slowly moving, but they get stuck at their edges due to friction. When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust and cause the shaking that we feel.

professor genki said...

HELLO PEEPS

Anonymous said...

A earthquake is a movement of earths plates.The shaking we feel is caused by the plates violently scraping the others.The experience we get is very scary!

john p said...

An earthquake is caused by a sudden slip on a fault. The tectonic plates are always slowly moving, but they get stuck at their edges due to friction. When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust and cause the shaking that we feel.

Anonymous said...

Its when plates in the earth shift and grind together, when this happens it makes the ground shake and sometimes cause major destruction.

pizza steve.

Anonymous said...

the sliding of a plate tectonic and breaking of in different forms such as divergent or convergent plate boundaries.

professor genki said...

Genki Bowl!!!

Mr Ruby said...

how does pizza steve relate to the question ?

Mr Ruby said...

Please this blog is for science only

AutumnP said...

When the earth's crust moves

McKayla. M said...

When the Earth shakes because of tectonic plates grinding against each other

MackenzieE said...

When earths plates move hit each other thats what a earthquakes are.

Mark.T said...

An earthquake is caused by a sudden slip on a fault. The tectonic plates are always slowly moving, but they get stuck at their edges due to friction. When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust and cause the shaking that we feel.

Natanya L said...

When the Earth's plates grind together.

LILY R said...

A type of storm that shakes the ground.

Mark T said...

a pineapple

Abbie N said...

An earthquake is when the earth shakes because two plates rub against eachother.

Elsa L said...

When the Earth shakes because of tectonic plates grinding against each other
Original comment from McKayla M.

Gavin M said...

A type of storm that shakes the ground.-Lily R

lindseyb said...

A earth quake is when plates in the earth move and waves move through the earth.

Billy M said...

A type of storm that shakes the ground

Lily

Kanani L. said...

An earthquake is a sudden shaking of the earth created by two plates that( lye within the earth )rub together and make an earthquake.

Molly B said...

when to plate rub it make the ground shake
!

Unknown said...

Its when the ground shakes and creates the disaster

Matthew G said...

An earthquake is when the plates underground rub together.

Molly B said...

when 2 plates under ground rub it makes the ground shake !

Anonymous said...

Its when the ground shakes and creates the disaster