More curious about the max MMI, given
The Richter scale is a (logarithmic) measure of energy released, so says as much about how much area was affected and for how long as about how strong it was at any one place & time. The Modified Mercalli scale is a better measure of how bad a quake is at a particular point.
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Though I don't really know how they come up with "official" values for that. It seems the ones on the website are just estimated from reports.
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Somewhere in there there's also a map with estimated MMI values... but the site isn't really working now. (I don't even see where you see the IX.)
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This is interesting.
The shakemap for that 7.1 #earthquake finally came through and I've never seen anything like it -- the shaking almost reached the Bay Area!
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Jul 6, 2019 · 4:42 AM UTC