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The largest earthquake in Japan

More than 7,348 dead and the story of a rescue false Japan

get excited about a young man who was thought to have survived eight days under the rubble. - Increase to 10,947 missing. "The authorities fear that comes to 10,000 deaths .- The temporary camps are home to 530,000 displaced, most in the area of \u200b\u200bMiyagi

AGENCIES - Tokyo - 19/03/2011

A tsunami with waves up to 10 meters sweeps the country's northeastern coast after a 8.9 magnitude quake, the strongest in 140 years .- The Government notes that the death toll may exceed a thousand, although At last count figure at 703 dead and 784 missing nuclear emergency declared by problems at two plants

The hypocenter of this earthquake was located at a depth of 24 kilometers under the Pacific Ocean, 130 miles Ojika Peninsula, in the same area two days ago there was another earthquake of magnitude 7.3 that caused no damage. The quake occurred at 14.46 local time (of 6.46, English CET) and reached the highest magnitude 7 on the Japanese scale, which focuses on the affected areas rather than the intensity of the tremor. According

the U.S. Geological Survey

, one of the global reference, the quake had a magnitude of 8.9 on the Richter scale, the highest recorded in Japan since measurements began 140 years ago.

The tsunami brought the memory of yesterday

Indian Ocean Earthquake

of

2004

that swept across the Indian Ocean on 26 December 2004 struck a dozen countries and caused more than 230,000 dead. The worst earthquake in Japan earlier in 1923 occurred in the Great Kanto in the Tokyo area. Had a magnitude of 8.3 and killed 143,000 people. Which occurred in Kobe in 1996 caused 6,400 fatalities. Damage amounted to 100,000 billion, making him then the costliest natural disaster in history. The economic damage from the tsunami of 2004 amounted to 10,000 million dollars, affecting less developed countries.

The earthquakes and tsunami warnings are part of everyday life in Japan. The archipelago suffers about 20% of earthquakes of magnitude higher to 6 that are produced in the world. The archipelago lies in the so-called Ring of Fire, an arc of areas prone to earthquakes and riddled with volcanoes, which recorded 90% of the world's earthquakes.

What is a tsunami?

Seismic waves travel a hundred times faster than the tsunami, so that although scientists can not predict when and where an earthquake will occur (or how much), once it has detected a There may be a time frame for, from the earthquake data, can predict where the tsunami arrival time and wave height. Tsunami centers in the Pacific in particular, do the job. The Japanese word tsunami comes from the harbor (tsu) and wave (nami).

The normal waves are generated by tides, wind, weather and currents, while the tsunami was triggered by something that causes a displacement of a large volume of water, as landslides, volcanic eruptions volcanic and earthquake experts

report NOAA (National Oceanic and Atmospheric U.S.).

losterremotos is precisely that occur in subduction zones (where two tectonic plates pushing against each other and introducing a under the other), which more typically can generate a tsunami. Once

triggers tusnami, waves moving at a speed of about 800 to 1,000 kilometers per hour as a commercial airliner, but is slower in shallow water. The waves can reach 10 meters to reach the coast and waves, unlike the normal sea surface movement involving the entire water column to the bottom. And not have to be one, but may be several more spaced in time than normal, usually spend several minutes between a wave crest to another, but sometimes it can take up to an hour, so the situation danger to the coastal town is maintained for some time.

Approaching the coast the tsunami, the water can recede, retreat, and then gets the brunt of the wave. People returning to their homes once they have passed the first wave is at high risk of encountering the following, warn experts. And not always the first to arrive is the largest, but sometimes the fifth or sixth. The tsunami not only travels at high speed, but can reach long distances with limited energy loss, so it can cross an ocean and distant shores strike with great force. The tsunami warning systems take advantage of those hours may be between the earthquake and the arrival of the giant waves. Networks are based on pressure sensors installed on the seabed and surface buoys that transmit information on the status of the sea, in real time by satellite. With this information and data from the phenomenon that triggered the tsunami, the earthquake in this case (the quake zone, the type, depth of epicenter, etc., with essential data) experts can analyze computer models development situation, estimate arrival times at different costs and expected wave heights. This information is passed immediately to the authorities responsible for public warning and take action against the impending catastrophe.

ELPAIS.ES

Catastrophe in the Pacific TO LEARN MORE:

Japan Tsunami

from notifuente.com

Aerial view of tsunami on its entry in the prefecture of Miyagi

.

(Technical data of the earthquake by the U.S. Geological Service

).

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Earthquakes in the world