The Japan 2011 earthquake also was called the Great East Japan earthquake or the Great Sendai earthquake. It took place on Friday or in 11 March 2011 during the midday. The quake was registered at 9.0 magnitude that was also documented as one of the fifth biggest earthquake in the world’s earthquake history.
The focus of the quake was around 20 miles or in about 30 kilometers underneath the sea ground. The cause of the 9.0 magnitude earthquake was the thrust fault. The thrust fault was involving the North American and Pacific tectonic plates.
On that boundary of the two tectonic plates was that the earthquake took place. It was also called subduction zone referring to a motion of the related tectonic plates creating a powerful earthquake. Japan is located on the shoreline near the plate boundary between North American and Pacific tectonic plates.
The convergence of those tectonic plates was around 9 centimeters annually. There was accumulated tension released in a thrust fault where the Pacific plate pushed under the North American plate and became a cause for the tsunami.
Areas Affected by the Earthquake
The Tohoku region or province was the one that is affected by the Japan 2011 earthquake and tsunami. The location or epicenter of the earthquake was on the eastern side of the Japan Island, Honshu or was eastern side of the Sendai on the Tohoku area. The Fukushima nuclear reactors which was on the shore line were also being damaged and leaked to release a dangerous radioactive substance from four exploded nuclear plants.
There were more than 18000 victims (a minimum of 10000 lost) and more than 100.000 were forced to leave their areas. Because the tsunami has devastated their houses and the mainland, the Fukushima nuclear facilities also were broken or damaged. That reactor was also the factor causing the people to evacuate immediately since the radioactive was providing further threaten towards the Japanese inhabitants. Besides, there were death or loss of inhabitants in their own devastated towns.
The disaster of Fukushima nuclear plants were analyzed, identified to measure the level of its emission. That was measured at level 7 by the INES. The emission was one tenth of the emission caused in nuclear disaster in Chernobyl, Ukraine. The death related with the disease of emission such as heart disease and depression were weightier than the death by the direct radioactive emission.
The Earthquake and Tsunami
There were actually some foreshocks that took place before the intense earthquake took place measured at 9.0 magnitude. However, the people did not realize that any major earthquake could happen some days after the first earthquake or foreshock. Thus, it now has been concluded that the earthquakes happened two days before were actually the foreshocks.
When the tsunami warning was released, Japan has been hit by the 9.0 magnitude earthquake that forming large tsunami peaking at 130 feet or 40 kilometers high. Before the earthquake, Japan was a normal place, but after the earthquake and tsunami wave that hit the Tohoku area or province, Japan was devastated and suffered a big loss in terms of human casualties. Because the earthquake was triggering the giant and the hazardous tsunami, the effect was devastating.