编辑-地球科学江南体育网页版堆栈交换江南电子竞技平台

你不是登录。你的编辑将被放置在一个队列,直到同行评议。

我们欢迎编辑,使读者更容易理解和更有价值。因为社区成员审查编辑,请尽量使文章更好比你怎么发现,例如,通过修正语法或添加额外的资源和超链接。

牧师

为什么有些地震和火山发生在板块?

我知道火山和地震发生在板块的利润。但是,其中一些还发生在盘子吗?

回答

地壳板块不均匀,均匀连续岩体与统一的压力。他们是一个混合的岩石类型变量应力和应力集中。他们也不连续。有(断层)[1]在板块区域。有些缺点是活跃的和不活跃的。运动发生时一个活跃的断层,通常是由于板局部应力,在板块地震将会发生。关于板火山。这些都是由于地质(热点)[2]。>认为这些是美联储通过地幔异常炎热而周围地幔。[引文需要]地球表面上他们的立场是独立的板块边界。有两种假说试图解释他们的起源。 One suggests that hotspots are due to mantle plumes that rise as thermal diapirs from the core–mantle boundary. The other hypothesis is that lithospheric extension permits the passive rising of melt from shallow depths. ---------- ***Edit 22 September 2021*** Following a [5.8 magnitude earthquake in southeastern Australia][3] this description from a seismologist from [Geoscience Australia][4] is a good example of how intraplate earthquakes occur. > "Imagine if you will, that a tectonic plate is analogous to a [pavlova][5] — with a thin brittle crust lying above a ductile, but mostly solid meringue mantle," [![Pavlova][6]][6] > "The Australian continent would sit in the middle of our pavlova." > > If you put your hands on the edge of the pavlova and start to squeeze, the crust around your hands will be the first to break, like those earthquakes at the boundaries of tectonic plates. > > But if you continue to squeeze, eventually strain builds up in the centre of the crust, and cracks will begin to appear. > > This is similar to how we get earthquakes in Australia. > >"The same forces that drive earthquakes on tectonic plate boundaries are at play — they just take a lot longer to manifest in the middle of our pavlova, > > Australia is actually rocked by an earthquake about once per day, but the more damaging quakes — above magnitude-5 — are only typically seen about twice a year. > >But Dr Allen says it's extremely unlikely Australia would ever experience a magnitude-8 or 9 earthquake. > >That's because the forces necessary only occur at the plate boundaries, where plates can lock together and break apart with tremendous force. > >"We don't have faults that are large enough or active enough to have these really big earthquakes we see on the plate boundaries," Dr Allen says. > >"In general, the rates of earthquakes we see here in Australia and in other stable tectonic regions are roughly about a hundred times less than that of areas on plate boundaries." [1]: https://en.wikipedia.org/wiki/Fault_(geology) [2]: https://en.wikipedia.org/wiki/Hotspot_(geology) [3]: https://www.abc.net.au/news/science/2021-09-22/earthquakes-in-australia-pavlova-demonstrates-how/100429578 [4]: https://earthquakes.ga.gov.au/ [5]: https://en.wikipedia.org/wiki/Pavlova_(cake) [6]: https://i.stack.imgur.com/oHPnf.jpg

编辑总结

取消

1

\ begingroup美元 + 1奶油蛋白甜饼蛋糕! \ endgroup美元
- - - - - -Gimelist
2021年9月23日,在收窄

添加一个评论 |

正确的小错误或错误
澄清的意思,而不更改它
添加相关资源或链接
总是尊重作者的意图
不使用编辑与作者回复

创建代码用引号”或式子~篱笆
' ' '
像这样
' ' '
添加语言标识符来突出显示的代码
”“python
def函数(foo):
打印(foo)
' ' '
把段落之间的回报
在结束linebreak添加2个空间
_italic_或* *的* *
报价将>开始的
做链接(尽量使用https)
< https://example.com >
(例子)(https://example.com)
< a href = " https://example.com " > < / >示例
MathJax方程罪\ \ ^ 2θ美元

格式帮助»
回答帮助»

MathJax帮助»