2. Yushu belongs to the new compression zone at the junction of Asia-Europe plate and Indian Ocean plate. The boundary between plates is a place where crustal activity is frequent. Yushu this year is a manifestation of strenuous exercise. Chile and Peru belong to the extinction zone at the junction of the Antarctic plate and the American plate. This year's earthquakes in the two countries are also manifestations of sudden and violent crustal movement. As for the difference in casualties, we should first analyze it from natural factors: whether there is a difference in earthquake magnitude; Secondly, it is analyzed from social factors: differences in local population density, differences in building and living density, differences in building structure and building quality, and so on. Finally, on the issue of prevention, earthquakes can not be accurately predicted so far, and can only be prevented from society.
3. The volcanic eruption in Iceland is also due to the growth boundary between the Eurasian plate and the American plate, so there are more than 100 volcanoes in Iceland, including more than 20 active volcanoes. Numerous volcanoes mean that geothermal and hot spring resources are correspondingly rich, and Iceland is named because it is located near the Arctic Circle and has formed numerous glaciers. This year, Iceland's violent volcanic ash was carried to the European continent by the prevailing westerly wind in the North Sea, causing almost all airports in Western Europe to be grounded due to lack of visibility. The daily direct loss is tens of millions of euros, which also makes this small country, which was originally unknown, become the global focus. ...
I guess what you are talking about should be the floods in southeastern China. When I was in geography class in high school, I remember the teacher said that the south was waterlogged and the north was dry, and the north was waterlogged and the south was dry. In fact, this is determined by the intensity of the sub-low pressure (Indian low pressure). When the Asian depression is relatively weak, the coastal southeast trade winds are not strong enough to transport ocean water vapor to North China, which leads to drought in the north, so too much water vapor stays in the southeast and finally forms heavy rainfall. In a short time, the water level of the river soared.
5. As for the snowstorm in Xinjiang, it was caused by the strong influence of the northern Asian high (Mongolian Siberian high) in an abnormal year.
6. Impact of the financial crisis. Sorry, I'm not a finance major, so it's really hard to give you a comprehensive answer. I just heard from the teacher in the elective course that it was caused by a series of factors, such as American subprime mortgage ... I suggest you download some Lang Xianping financial programs or comment on the Internet. I think the analysis is quite good. ....
PS: I answered so many questions myself. LZ will give me extra points, hehe. ....