When significant earthquakes occur anywhere in the world, such as the December 2004 tsunami-generating event in Indonesia that killed more than 200,000 people, or the October 2005 earthquake in Pakistan that killed more than 70,000 people, emergency response and relief efforts come from around the globe, and there is renewed interest in understanding the causes and in mitigating the devastating effects of earthquakes.Įarthquakes can be significant hazards, as evidenced by occasional damaging and deadly events. The vast majority of earthquakes are caused by sudden slip along faults, resulting in seismic waves that shake the ground, often with sufficient force to damage structures or trigger other events, such as landslides. Most earthquakes are associated with natural, dynamic processes that shape Earth’s landscape.
Thus, the earthquake process can be interesting and even frightening to people.
Although earthquakes happen frequently in many parts of the world, any occurrence of a moderate to large event is sudden and unexpected.
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