Magnitude 8.9 off the coast near Sendai, with many significant aftershocks. USGS reports that there was a 7.2 magnitude quake in the same area two days ago, which had three 6+ magnitude aftershocks.
[Update: Brickmuppet has some disturbing details; coastal trains just “missing”, a city of 77,000 wiped off the map, etc. So far the best news I’ve seen is that the nuclear power plant that didn’t have enough coolant for a safe shutdown has been resupplied by air by the US Air Force (no, Hillary was talking out of her ass again).]
[Update: The American Red Cross doesn’t have a targeted donation page up yet for this disaster, but as reported by Reuters and elsewhere, they’ve set up an instant text-message donation system, and of course their standard international donation fund will be used to help out in Japan and elsewhere. I don’t see a way to contribute directly to the Japanese Red Cross on their site, but I’m sure we’ll find something when we arrive in Kyoto in two weeks.]
[Update: Wikipedia, Google Crisis Response pages]
[Update: Amazon is processing Red Cross payments through a prominently-displayed button on their home page. Amazon Japan has a letter on their home page redirecting to the Japan Red Cross donation site, which is currently a bit flaky.]