Earthquakes are becoming more frequent?

Earthquakes are becoming more frequent ? the Beijing News weekly of the new knowledge

2010 initial outburst, the earth suddenly disturbed.

3 January 7.1 earthquake happened in the Solomon Islands; January 12, Haiti 7.0 earthquake; February 26, Ryukyu Islands 7.0 earthquake happened; 10 hours after 8.8 Chile earthquake occurred. As I write this article, articles, Taiwan 6.7 earthquake happened again. Earthquake so frequently, the Earth is not very unusual?

In fact, been quite frequent earthquakes

Generally considered that each year occur approximately 500 million earthquake, average daily attendance of more than 1 million, but the vast majority not be noticed.

According to the United States Joint Institute of seismology, global level 6 more earthquakes per year on average nearly 200 times, 7-level above an average of nearly 20 times, 8-level above average nearly 3 times per year. The larger the number of earthquakes series. See United States Geological Survey (USGS) 2000-2009 global 5 earthquake statistics above grade, every year the number of earthquakes is not law, but in General, can be regarded as 2007 down more frequently during the earthquake. 2010 the number of earthquakes since did not show the number of abnormal, even if there are small differences in the number, it is caused by the earthquake of randomness.

The vast majority of earthquakes have occurred in plate boundaries, of which 70% of the global distribution of the earthquake in the Pacific "ring;

secondly seismic zone" 15% distribution in "Eurasian seismic zone"; and 5% in ocean ridge; last about 10% in the plate. This is a statistical regularity. But because the scientists are still unclear earthquake mechanism and principle, the following an earthquake in which locations and which always occur, there is no way to predict accurately. So scientists also believe that the earthquake is random.

Look

at this year's several major earthquakes, Solomon Islands, Ryukyu archipelago, Chile was in the Circum-Pacific seismic belt, Haiti is also in the plate boundaries, so these four major earthquakes occur is fully up to the principles of geology, is normal seismic phenomenon.

Would you like some psychological factors

Some people think: seismic change frequently.

In fact, earthquake or those who have regular seismic, it also randomly occurring, but it has never been whether comes in a sparsely populated or sparsely populated. However, since in recent years in a densely populated area of the earthquake, let us focus earthquake than ever before.

In 2007, global 8 earthquake reached above grade 4 times, is the 21st century more than earthquakes since 8th grade year.

From the figures, comparing the exception, but who heard these earthquakes? then who ever worried about its exception? as the earthquake in China, who remember 14 November 2001 in Qinghai Kunlun mountains of 8.1 earthquake? this earthquake is nearly half a century to the largest earthquakes. But just because it happens in a densely populated region, personnel and property loss is small, so it is not public.

From the psychological factors, it is not difficult to understand.

Wenchuan earthquake disaster gives rise to enormous psychological shadow, "earthquake" highly sensitive, began to pay attention to various and earthquake-related information, and no exception of earthquake, so it looks more and more intensive. Public class 8.8 Chile earthquake, produce all sorts of suspicion is understandable — if an earthquake occurs equally in the Circum-Pacific sparsely Alaska region, may attract so many strong repercussions.

Earthquake at the beginning of the year 2010 is a great earthquake, has also created a large disaster.

But may not have great earthquake disaster, small earthquakes may not only cause a small disaster lies where the earthquake happened. Seismic activity is abnormal, belongs to the earthquake in the frequency of the statistical problems that we are not concerned about earthquake many seismic activity is understood to have exceptions, is not the equivalent of a seismic disasters occurring frequently. Overall, the current earthquake locations are normal and frequency in the statistical sense is normal.

In the wake of a painful Wenchuan earthquake, more than ever we care about their Habitat — — the Earth.

China is not the largest earthquake, it is the most serious earthquake disaster, we care about the earthquake, the more practical earthquake emergency knowledge, learn how to protect yourself in the earthquake.

□ Empty error (Beijing seismology)