Japan suffered the largest earthquake in its history (remember, whenever we speak of periods of no more than 100 years, when they began to measure these phenomena), a shock of an intensity of 8.9 on the Richter scale , equivalent to the energy released by the detonation of 240 to 260 million tons of TNT . In definitva, an event of overwhelming power. These are relatively common throughout the Pacific arc, where several tectonic plates collide with each other, sinking below each other, in the process generating earthquakes, strong volcanic activity and the elevation of the Cordillera of the Andes . In fact you just have to find a list of earthquakes recorded podersos to realize that most have occurred on the shores of this ocean, both American and Asian ... and something similar can be said of the major volcanic events, including the famous Karakatoa explosion, when this island literally blew up. Only the lack of historical knowledge makes many be surprised when they occur, see it as something unprecedented and catastrophic associating ideas of all kinds.
The recent earthquake in Japan was not an exception, because this country concentrates up to 20% of the seismic activity is recorded each year, although spectacular in their power, which places it as the 5th most powerful since 1900. As usual in this area, the worst damage was not due to direct work of the earthquake (because Japan is ready for them), but the great Tsunami generated with waves up to 10 meters, hit the northern coasts of the country. Similar to what happened not so long ago in Indonesia .
The top map, which combines data U.S. Geological Survey (USGS) with topographic offered by the NASA and ocean collected by the British Oceanographic Data Center says hepicentro both the earthquake (the largest circle) and all replicas that have occurred so far, and are common in these cases. Notable circles drawn lines, and earthquakes show before the big earthquake, the strongest of which exceeded the scale 7, which were a harbinger of what was to come
And that this is not something him to take completely unprepared to Japan, it is precisely these movements "prior" have the alarm bells ringing ... it was hours before the unexpected intensity of the phenomenon, along with the tremendous Tsunami that followed, which came as a surprise to all and limited the possibilities reaction of the country.
Within Unfortunately there were two items on one side .... lucky it happened in the least populated of Japan, far from major urban concentrations of Tokyo, Yokohama, Kyoto, Osaka and Nagoya, which limited the losing life and property. On another point of origin (hypocenter) was very deep, about 24 miles below the ocean floor, which cushioned his power surface. Have occurred further south and more superficial the consequences could have been unimaginable.
In defintiva therefore we have a "liberation" of energy accumulated by the continuous clash between the plates of the Pacific and North America , which is locked as rubber bands are "tightening" to break this deadlock, time translates into a large earthquake. Given that Japan coalesce to four ( Pacific, North American, Eurasian and Philippine ) is not surprising that this country live under the constant threat of earthquakes and therefore the most prepared than any other country in the world to tackle them. One 8.9-populated elsewhere in the world could possibly have deadly consequences.
We are, without doubt, a great disaster will cost to overcome, but we also have the absolute assurance that this great country will succeed. From "The Star Travelers," my full support and encouragement to the Japanese people. All my support and encouragement "to the Japanese people.すべて の 私 の サポート や 励まし を 日本 の 人 々 に
horrific images of the earthquake and tsunami ... but also remarkable in the order in which the country's citizens face the event and try to follow their daily activities. Something that guarantees Japan will soon heal their wounds.
The tectonic plates of the earth's crust ... in Japan shows that confusion to 4 of them, which explains the long history of earthquakes in this country. On the other hand, the collision between the Nazca plates Sudamárica and Latin American coasts subjected to a strong seismic activity (an example of which is the recent earthquake in Chile). 
Japan from space, in an image taken in 1999 ... under the big cities and green mountains "late" a mighty heart geological islands shakes continuously. 
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