earthquake slide show

7/29/2019 Earthquake Slide Show

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BY :

ABIDAH BT SARAJUL HAQSEKOLAH TUANKU ABDUL RAHMAN, IPOH


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About Plat Tectonics

Plate tectonics tells us that the earths rigidouter shell is broken into a mosaic of oceanicand continental plates which can slide overthe plastics nesthemosphere, which is theupper most layer of the mantle.

The plates are in constant motion where theyinteract, along their margins, important

geological process take place, such asmountain belts, earthquake and volcanoes.


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Earthquake

An earthquake is a sudden shift in thetectonic plates in the earth crust. This ismanifested by the moving and shaking of the

ground, and can be massively damaging topoorly built structures.

The most powerful earthquake can destroyeven the best built structures. In addition,they can trigger a second disaster such astsunamis and volcanic eruptions.


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Earthquakes occur along fault lines and are

unpredictable. They are capable of killingthousands of people, such as in 1976 Tangshanand 2004 Indian Ocean incidents.

There are 3 main plate tectonics :

extended, transformed and compressed . Plateboundaries in different localities are subject to

different inter plate stresses, producingearhquakes.


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Extended Compressed

Transformed

TYPES OF PLATE TECTONICS


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Richter Scale

Earthquake can measured by usingseismograph. Earthquake strength canseparate into 9 types that refers to richter

scale.

Earthquake Strength Effects

Lower than 3.5 Generally not felt, but

recorded.3.5-5.4 Often felt, but rarely causes

damage.


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Lower than 6.0

At most slight damage to well

designed buildings. Can causemajor damage to poorlyconstructed buildings over smallregions

6.1-6.9

Can be destructive in areas up toabout 100 km across where peoplelive.

7.0-7.9

Major earthquake can causeserious damage over larger areas.

8.0 or greater Great earthquake can causeserious damage in areas severalhundred kilometres across.


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SEISMOGRAPH

Sensitive seismograph are the principal toolof scientist who study earthquakes.1000 ofseismograph stations are in the operationthroughout the world.


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Seismograph is a simple pendulum.When theground shakes, the base and frame of theinstrument move with it. But, keep thependulum bob in place. It will then appear tomove, relative to the shaking ground.

As it moves it records the pendulumdiplacements as they change with tine, tracing

out a record called seismograph.


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EA THQUAKE HISTO Y ON


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EARTHQUAKE HISTORY ON

20th & 21st CENTURY

26 December 2004

8.9 on Richter Scale shaking Aceh and trigger oftsunami. It was a powerful earthquake in a decade

26 December 2003

The powerful earthquake in Bam, Iran that measured6.9 on Ricther Scale cause 41,000 people were killed.

21 May 2001

In North Afghanistan, 1000 people were killedbecause of earthquake measured 5.8 on RichterScale.


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21 September 1999

Taiwan, measured 7.9 on Richter Scale caused 2,400

people were killed. 17 August 1999

In west Turkey, measured 7.4 on Richter Scale andcaused 17,000 people were killed.

30 May 1998In north Afghanistan and Tajikistan with measured6.9 on Richter Scale and caused 5,000 people werekilled.

17 January 1995In Kobe, Japan with measured 7.2 on Richter Scaleand caused 6,000 people were killed.


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7 December 1988

In west Armenia earthquake occurred with 6.9 on RichterScale and caused 25,000 people were killed.

28 July 1976In Tangshan, China, measured 7.8 on Richter Scale and240,000 people were killed.

29 February 1960

In south-west Maghribi, with 5.7 on Richter Scale caused57,000 people were killed and destroyed whole Agadirtown.

29 Disember 1939

In Erzincan State, Turkey with 7.9 on Richter Scale and33,000 people were killed.

1 September 1923

In Yokohama, 140,000 people were killed effected from

earthquake with 8.5 on Richter Scale.


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earthquake slide show

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