uuboot72
helikopter
Dołączył: 06 Paź 2010
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Skąd: England
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 Wysłany: Pon 13:14, 01 Lis 2010 Temat postu: buy more and you can get more discount price |
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Earthquake (the fast vibration that Earthquake) is earthly surface layer, call quake again in ancient time. It is just like blow, rain, lightning, same, it is a kind of natural phenomenon that often produces on the earth. Earth vibration is the performance with the the most intuitionistic, most general earthquake. In the violent temblor that sea floor or seaside area produce, can cause huge wave, call seismic sea wave. The earthquake is extremely frequent, the whole world produces about 5 million earthquake every year.
The place that seismic wave originates,[link widoczny dla zalogowanych], call focus (Focus) . Focus is in ground is perpendicular and umbriferous, the closest from focus on the ground called an epicenter. It is to accept the position with the earliest vibration. The epicenter calls focus deepness to the deepness of focus. Call what focus deepness is less than 70 kilometers shallow source the earthquake normally, deepness is in the earthquake of the source in crying of 70-300 kilometer,[link widoczny dla zalogowanych], deepness is more than 300 kilometers call deep source the earthquake. To the earthquake of same size, because focus deepness is different, the destruction that causes to the ground level is different also. Focus is more shallow, destroy bigger, dan Bo and scope are less also, vice versa.
Ruinous earthquake is shallow source earthquake commonly. Like the Tang Shan 1976 focus deepness of the earthquake is 12 kilometers. The ground of ruinous earthquake is oscillatory most intense place is called extremely shake area, extremely shake area often namely the area that the epicenter is in.
Japan is country of world-renowned seismic much hair,[link widoczny dla zalogowanych], whole world magnitude is in the earthquake of above of 6 on the Richter scale, 20 ％ above happens in Japan. Among them magnitude is in of 3 class above have 4 times everyday. Small shake is more consecutive, make an appointment with 300 cases everyday.
Like Hefei area these days small shake to attribute normal and normal phenomenon, advocate if earthquake of plain of short of Wenshui River gives everybody shake,was afraid of. Nevertheless everybody raises next shock-proof consciousness still is very necessary.
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