美国地震风险图
发表于 ： 21 1月 2024, 13:32
I can foresee a new plate boundary emerging at the corner of Missouri, Arkansas and Tennessee, and it will spread northeast to Lake Erie and Lake Ontario and finally join St Lawrence River. To the south, it might follow the Mississippi River. Give it 50 million years, the US will be on both side of an ocean.
远离西海岸？
美国历史上最大的马德里地震就发生在那里。那是北美版块的应力中心。
fortyNiner 写了： ↑21 1月 2024, 16:19I can foresee a new plate boundary emerging at the corner of Missouri, Arkansas and Tennessee, and it will spread northeast to Lake Erie and Lake Ontario and finally join St Lawrence River. To the south, it might follow the Mississippi River. Give it 50 million years, the US will be on both side of an ocean.
Well, maybe the term "per capita" is not the right one to use when assessing natural disaster, but I believe they do have something similar.
If you add all the deaths due to natural disasters the last hundred years, you can find the risk. However, a powerful quake might wipe out the population of a big city with 1 million, but it kills only one person when it hits a remote area and that person is the only one there. But that does not mean the quake risk is a million times higher in that city than in that remote area. That's why I used the term "per capita". I am sure they adjust appropriately when assessing the risk.
Anyway, if you look at the risk from all natural disasters combined, the West might not have higher than the East.
mi6 写了： ↑21 1月 2024, 16:33Oh yeah, simple math huh?
- this is the first time I heard somebody using per capita data to assess natural disaster risk.
fortyNiner 写了： ↑21 1月 2024, 16:25Taking them all into consideration, the West might have lower natural disaster risk per capita than the East.
Yes, it's a weak spot. It might break and tip the balance.
牛大春 写了： ↑21 1月 2024, 16:28美国历史上最大的马德里地震就发生在那里。那是北美版块的应力中心。
fortyNiner 写了： ↑21 1月 2024, 16:19I can foresee a new plate boundary emerging at the corner of Missouri, Arkansas and Tennessee, and it will spread northeast to Lake Erie and Lake Ontario and finally join St Lawrence River. To the south, it might follow the Mississippi River. Give it 50 million years, the US will be on both side of an ocean.
是的。那个点往北是加拿大地盾，地球上最稳固的克拉通之一。往南的美国南部是后来融合上去的。