Japan Hit by 7.3 Magnitude Earthquake; Where Do Clues to Massive Quake Lie?

 Hereafter innumerable massive earthquake of a 7.3 magnitude jolted Japan's northeastern coast on Sunday that triggered a brief tsunami warning for the area, which is still recovering from the Tread 11 earthquake and resulting tsunami that destroyed houses, dynamism and swept away total towns.
 According to public broadcaster NHK,the tsunami alert for the northeast coast has been lifted, about two hours subsequent the quake. Earlier,the organization at the disabled Fukushima Daiichi nuclear plant were warned to exit following an alert for a tsunami of 50 centimeters issued by the country's metreological agency. However, know stuff were no immediate reports of damage from the earthquake.

 The earthquake struck at 9:57 local life span ( 0057 GMT ). The epicenter of the quake was connections the Mollifying Ocean take the coast of Japan's main island,Honshu,at a depth of about 20 miles ( 30 kilometers ).

 Not for secure in that the Tread earthquake
 The twin area was hit by a massive 9. 0 earthquake on Walk 11 that uncherished midpoint 23, 000 humdrum or mislaid. Existent also cut function to the Fukishima nuclear virtue plant that eventually melted down into the worst nuclear mishap plenty.

 After Trudge 11, due to power loss at the Fukushima nuclear plant, the cooling systems were warped badly, causing fuel access three of the plant's six reactors to wed down. Apart from that, subsequent hydrogen blasts scattered radioactive away over a wide area.

 In that of the radiation, midpoint 80, 000 residents keep been forced to drop out. Japan's control has faced withstanding allotment for its purpose of the calamity, putting besides pressure on unpopular Prime Minister Naoto Kan to discontinue.

 Fortunately, adept were no reports of abnormalities at the Fukushima plant caused by Sunday's quake, according to Japan's Kyodo announcement agency. Airports are again functioning normally.

 Although Japanese officials predicted tsunami of up to 20 inches ( 50 centimeters ),the Sunday's quake could generate pursuance of about 4 inches ( 10 centimeters ). However, palpable registered 4 on the Japanese scale of 7,use it was felt as another strong one.

 Does the Costa Rica ' s Seafloor hold clues to Japan earthquake?

 Scientists believe that pieces of rock and seafloor from deep in the Pacific Ocean near Costa Rica might be helpful in explaining why Japan's deadly magnitude - 9.0 quake was so large.Falling within the so - called Ring of Fire zone, both Japan and Costa Rica nations are prone earthquakes.Volcanic arcs and oceanic trenches partly encircling the Pacific Basin form the Ring of Fire,a zone of frequent earthquakes and volcanic eruptions.

 Scientists have collected nearly 1 mile of sediment cores ( cylinders of earth drilled out from the ground ) from the ocean floor off the coast of Costa Rica, revealing detailed records of about 2 million years of tectonic activity along a nearby seismic plate boundary, where one tectonic plate dives beneath another, called a subduction zone. It was the crack of a subduction zone that generated the Japan quake, Insidecostarica reported.

 " It's critical to understand how subduction zone earthquakes and tsunamis originate - especially in light of recent events in Japan, " said Rodey Batiza of the National Science Foundation's Division of Ocean Sciences. " The results of this expedition will also help us learn more about our own such zone off the Pacific Northwest. "

 Over 80 percent of global earthquakes above magnitude 8.0 occur along subduction zones.

 source: http://www.ibtimes.com/articles/177287/20110710/japan-hit-by-7-3-pacific-ring-of-fire-magnitude- earthquake-japan-s-northeastern-coast-fukushima-daii.htm