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+--- Thread: 55 years ago (/showthread.php?tid=260)
55 years ago - Skywise - 05-23-2015
Almost missed this one... well did, by a day.
May 22, 1960 - M9.6 Chile Quake.
This is an example of magnitudes changing long after the quake and going up. Last I recalled it was only a 9.4. Then I read something today that refers to it as a 9.5. So I go and double check with the USGS catalog, and they show it as a 9.6.
Also, to tie in to other recent discussion here, the Cordon-Caulle volcano erupted 38 hours later. The volcano is located only 80 miles from Valdivia, which was devastated by the quake. So, did the quake cause the volcano to erupt? I don't immediately see anything saying exactly that, but given the very close proximity in both space and time, I don't think it's unreasonable to say it's very possible.
This quake also resulted in a tsunami that notably for our predominantly American-centric point of view, caused damage to Hilo, Hawaii. That is not to diminish the damage it caused locally in South America, where whole coastal villages were washed away.
added: http://seismo.berkeley.edu/blog/seismoblog.php/2015/05/22/
Brian