SCIENCE G7

The S wave is the first to arrive at a seismographs station.

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• false

The hypocenter is that point in Earth where the earthquake is generated by the shifting or rupturing of rocks.

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Earthquakes can happen when the strain on weak rocks forces them break and fracture.

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Faults are only found near the edges of tectonic plates.

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Normal faults occur when compression stress cause the hanging wall to move up with respect to the footwall.

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The Richter Magnitude scale can properly describe very large earthquakes that may release energy more than once over a period of several minutes and hundreds of kilometers along the same faults.

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Preparedness is everyone's responsibility.

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Strike slip faults occur when shearing and compression cause vertical movement along the dip, and horizontal movement along the strike.

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The Valley Fault System consists of two northeast - trending right lateral strike-slip faults that begin near Angat Dam in Bulacan to Tagaytay Ridge.

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Body wave is a very slow-moving wave along the earth’s surface, causing rocking movements that cause little damage to structures.

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