Checking this site: http://earthquake.usgs.gov/eqcenter/recenteqsww/Quakes/quakes_all.php Shows no activity in the impact area registering at least magnitude 2.5 (assuming the Richter scale) or greater for the last 7 days. A "Hiroshima" sized impact would certainly have registered on the closest station in the network, so perhaps your skepticism is warranted, Patrick. It would be nice to be able to see all the data for the period around the impact, in case it didn't quite make the 2.5 cutoff. If anyone figures out how to do it, please post. I'm going to bed. --- Chuck Hards <chuckhards@yahoo.com> wrote:
Could the impact have registered on USGS or other research seismographs?
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