SLIDE PRESENTATION

REKHA .R BEd SOCIAL

SCIENCE REG NO: 13303025

WELCOME

EARTH

QUAKE

INTRODUCTION An earthquake (also known as a quake,

tremor or temblor) is the result of a sudden release of energy in the Earth's crust that creates seismic waves. The seismicity, seismism or seismic activity of an area refers to the frequency, type and size of earthquakes experienced over a period of time

There are three main types of fault, all of which may cause an interplate earthquake: normal, reverse (thrust) and strike-slip.

Normal and reverse faulting are examples of dip-slip, where the displacement along the fault is in the direction of dip and movement on them involves a vertical component.

Normal faults occur mainly in areas where the crust is being extended such as a divergent boundary.

Earthquake swarms are sequences of earthquakes striking in a specific area within a short period of time. They are different from earthquakes followed by a series of aftershocks by the fact that no single earthquake in the sequence is obviously the main shock, therefore none have notable higher magnitudes than the other.

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