The earthquake in Japan has increased the risk of aftershocks throughout the country


31/05/2011

Huge earthquake magnitude 9.0 points that devastated Japan in March, are the reason that some areas, including Tokyo, are now, according to scientists, in the risk of aftershocks, and even new major earthquake is expected over the next few years.

After examining the data expanded seismic network in Japan, researchers from the Institute of Oceanography (WHOI), Kyoto University and the U.S. Geological Survey (USGS) have identified several areas that are in the risk of an earthquake, the largest in Japan, which has already initiated many aftershocks.

Due to the Tohoku earthquake on March 11, scientists are one step closer to the possibility of a better assessment of seismic risk in the future in specific areas, as noted Xingzheng Toda (Shinji Toda) of Kyoto University, lead author of the analysis. "Even if we can not predict accurately, we can explain the mechanisms included in such shocks the public" - he said. Yet, he added that the information did scientists "a little closer" to being able to forecast aftershocks.

The earthquake lifted the tension from the area where it happened, there by reducing the likelihood of the occurrence of such events in the future, but only in certain areas. Scientists have found that in the neighboring regions, the possibility of an earthquake may rise.

The largest earthquake ever recorded of all, it was also one of the best recorded earthquake in history thanks to the advanced seismic monitoring network.

This made the quake a "special" in terms of scientific research, as noted in his statement Dzhayen Ling (Jian Lin) from the Institute of Oceanography. "We felt that perhaps we can find something we have not seen before in the previous earthquake," - he said.

Earthquake magnitude 9 points affected large areas of the island of Honshu. In a special risk, according to Todd, is an area of Tokyo, Mount Fuji and central region of Honshu, including Nagano.

Part Kant, which is located close to Tokyo also experienced an increase in voltage. According to estimates of the previous government’s probability of the risk of earthquakes magnitude 7 points over the next 30 years is 70 percent.

Using a model known as the transmission voltage pendant, Lin and his colleagues found a significant increase in tension in the north-Sanriku Hokobu, southern Boso and the east coast of the Japanese earthquake epicenter near the city of Sendai. "Based on our other studies, these stress increases are large enough to increase the likelihood of significant aftershocks or subsequent major earthquakes" - the researchers noted in their analysis.

Original: LiveScience Translation: M. Potter


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