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 seismic activity of an area refers to the frequency, type and
size of earthquakes experienced over a period of time. Earthquakes are
measured with a seismometer; a device which also records is known as a
seismograph. The moment magnitude (or the related and mostly obsolete
Richter magnitude) of an earthquake is conventionally reported, with
magnitude 3 or lower earthquakes being mostly imperceptible and
magnitude 7 causing serious damage over large areas. Intensity of
shaking is measured on the modified Mercalli scale.
At the
Earth’s surface, earthquakes manifest themselves by shaking and
sometimes displacing the ground. When a large earthquake epicenter is
located offshore, the seabed sometimes suffers sufficient displacement
to cause a tsunami. The shaking in earthquakes can also trigger
landslides and occasionally volcanic activity. These pictures are
evidence of what nature can do to us, in a split second.
Haiti
Japan
San Francisko
China
San Francisko
Pakistan
Romania
USA
Paso Robles, California
Taiwan
Beichuan, Sichuan province, China
L’Aquila, Italy
Chengdu, China
Northridge, USA
California, USA
Kobe, Japan
Mexico City
Los Angeles, USA
Indonesia
Spitak region, Armenia
Beichuan, Sichuan Province, China
Beichuan, Sichuan Province, China
Los Angeles, California
Chile
Northridge, Los Angeles, California
Haiti
Turkey
Chile
Chile
Taiwan
Canterbury, New Zealand
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