Last night, the USGS reported a 7.0 magnitude earthquake ~15km/10mi southwest of Haiti’s capital of Port-au-Prince.
For the human perspective, The Daily Dish reposts some of the local reactions on Twitter and Haitian blogs. For the geological perspective, Highly Allochthonous has Tectonics of the Haitian earthquake.
It’s looking pretty grim. Also at the Dish, this wasn’t an unforeseen event.
[UPDATE: Reuters live coverage here.]
[UPDATE: MSF/Doctors Without Borders had workers already in Haiti when it happened. Read more here and think about donating, if you can, to a relevant aid organization of your choice.]
[UPDATE: TPM has live updates as well, though from a US/governmental/political perspective.]