Mostly earthquakes. Every once in a while, I rail against Grand Stupidities, which gets me into trouble. Now closed for the holidays.
Friday, March 11, 2011
Shakemap for Japan
Here is the automatic Shakemap for this earthquake. Note that we get a first glance at the rupture area, which seems to me a little short for an 8.9. I'm sure it's at least 1000 km and zooms off to the north more. As we can see, a classic subduction earthquake does not pump out a high PGV. From the videos, the shaking appeared mild, and would have just hit the swamps. This is farther out than Chile, so maybe it's just 40 cm/s on average ground. I don't think they build soft-story condos there!