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Epicenter

The epicenter or epicentre (pronounced /ˈɛpɪsɛntər/) is the point on the Earth's surface that is directly above the hypocenter or focus, the point where an earthquake or underground explosion originates. The word derives from the New Latin noun epicentrum, the latinisation of the ancient Greek adjective ἐπίκεντρος (epikentros), "occupying a cardinal point, situated on a centre", from ἐπί (epi) "on, upon, at" and κέντρον (kentron) "centre".

In the case of earthquakes, the epicenter is directly above the point where the fault begins to rupture, and in most cases, it is the area of greatest damage. However, in larger events, the length of the fault rupture is much longer, and damage can be spread across the rupture zone. For example, in the magnitude 7.9, 2002 Denali earthquake in Alaska, the epicenter was at the western end of the rupture, but the greatest damage occurred about 330 km away at the eastern end of the rupture zone.

For more information about Epicenter, read the full article at Wikipedia.
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Rising risk of major quake in Chile: study

Central Chile faces increased risk of a very large earthquake close to the site of last February's 8.8-magnitude temblor that killed 520 people and cost 30 billion dollars, scientists said on Sunday.

Space & Earth / Earth Sciences

created Jan 30, 2011 | popularity 4.4 / 5 (5) | comments 3

Signs of three major Japan quakes before 2011

Three major earthquakes seem to have occurred in northern Japan before it was hit in March 2011 by a massive quake and tsunami, researchers said Wednesday based on new evidence.

Space & Earth / Earth Sciences

created Apr 25, 2012 | popularity 5 / 5 (2) | comments 0

Japan's mega-quake struck in small zone of fault: study

The deadly 9.0-magnitude quake that struck off northeastern Japan on March 11 ruptured a relatively small part of a notorious fault that straddles the Pacific seabed, Japanese scientists reported on Wednesday.

Space & Earth / Earth Sciences

created Jun 15, 2011 | popularity 5 / 5 (2) | comments 0

Major Pacific earthquake prompts tsunami warning

A major 7.9-magnitude earthquake has shaken the South Pacific nation of Tonga and sending people in low lying areas of Fiji fleeing for higher ground after a tsunami warning, according to officials.

Space & Earth / Earth Sciences

created Mar 20, 2009 | popularity 5 / 5 (3) | comments 0

Massive iceberg shears off after N. Zealand quake

A 30 million tonne block of ice sheared off a New Zealand glacier just minutes after a violent earthquake devastated the city of Christchurch, officials said Wednesday.

Space & Earth / Earth Sciences

created Feb 23, 2011 | popularity 4.6 / 5 (5) | comments 2

No evidence to raise pandemic flu alert level to phase six: WHO + Latest snapshot of swine flu crisis

The World Health Organisation on Thursday said there was no evidence to suggest that it should raise a pandemic flu alert from phase five to the highest level of six.

Medicine & Health / Diseases, Conditions, Syndromes

created Apr 30, 2009 | popularity 4.3 / 5 (3) | comments 0

Germany hunts source of deadly E. coli

Germany said Sunday it was pulling out all the stops to locate the exact source of an outbreak of E. coli bacteria poisoning blamed for 10 deaths, which authorities suspect may have originated in Spain.

Medicine & Health / Diseases, Conditions, Syndromes

created May 29, 2011 | popularity not rated yet | comments 0

6.1 magnitude quake hits Philippines region: USGS

A 6.1 magnitude quake hit the Philippines region early Thursday, US scientists said, but no tsunami warning was immediately issued.

Space & Earth / Earth Sciences

created Jan 27, 2010 | popularity 2 / 5 (1) | comments 0