Seismologists have paid little attention to continental risk zones

U.S. Geological Survey data on earthquakes on Friday.

Evaluation of seismic risk is strongly biased towards earthquakes that occur at the boundaries of the "sea" of plates (which is a blow to the north-east Japan on March 11), while the shocks occurring in the inland, little attention is paid to the unforgivable, consider Philip England of Oxford and James Jackson of the University of Cambridge (UK).

Scientists pay attention to the fact that the Sendai earthquake of magnitude 9.0 has resulted in a surprisingly small number of casualties: killed 25 thousand people — just 0.4% of those who were in the area of propulsion, and the majority of lives claimed the subsequent tsunami.

At the same time, an earthquake occurring inland, killing 5-30% of people who find themselves in dangerous proximity to the epicenter.

According to experts, over the last 120 years there have been about 130 earthquakes, each of which has sunk at least a thousand people. About a hundred of them came just on the continent — they have killed 1.4 million people, while at the plate boundaries earthquake killed 800 thousand (about half — victims of the tsunami). The worst disasters of recent years — Bam (Iran, 2003, 30 thousand victims), Kashmir (Pakistan, 2005, 75 million), and Sichuan (China, 2008, 70 million).

Researchers believe that such a high mortality rate — the result of lack of attention to earthquake-prone areas in the world. However, this can be explained not so much by professional negligence as a complex and slow preparation push: to create tension at the point of rupture of the future leave hundreds of thousands of years.

And yet, instead look for excuses, Jackson and England offer to immediately begin closer monitoring of the Alpine-Himalayan belt, which covers 10 million square feet. miles from Italy to China.

Researchers presented their findings in the journal Nature Geoscience.

Prepared according to the Agence France-Presse and Discovery News.

PS The recent interest in earthquakes acquired an unhealthy shade. It becomes clear that some long-deceased allegedly taught predicted seismic catastrophe in Rome. Then we are told that a certain American preacher read in the Bible date for the destruction of human civilization by a series of earthquakes that occur on the same day all over the planet … Indeed, earthquakes happen every 2-3 minutes. But if you "need" considerable damage, the push should be a force of at least 5.0, and the frequency of such disasters — "only" every four days. The average annual number of earthquakes is: 1 — a magnitude of 8.0 or higher, 17 — from 7 to 7.9, 134 — 6 to 6.9; 1319 — from 5 to 5.9.

Not only that the investigators themselves seismologists pay little attention to risk areas, they are still a very small number of informed people. Well, it seems that such information falls on the shoulders of citizens. But how to know this many people? Social networks are losing popularity, but it takes on Twitter. And many bloggers go exactly at the microblogging service. But in order that people would read your tweets should really try to diversify microblog services, icons and plugins.

Like this post? Please share to your friends: