As you can tell from my last post, I am a bit concerned about the recent seismic activity in Ecuador, Japan and Yellowstone.
Here is a little bit of history: We all know about the San Francisco quake of April 18, 1906 (the links go to the respective Wikipedia articles)
What is not as well known is the January 31st, 1906 quake in Ecuador and Colombia
and the March 17, 1906 quake in what is now Taiwan.
These were all major quakes - Magnitude 7 and greater
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