Magnitude of the Haitian earthquake

The WSJ reports:

A powerful earthquake measuring 7.0 on the Richter scale shook Haiti on Tuesday, causing several buildings to collapse in the Western hemisphere's poorest nation and leading to an unknown number of fatalities, officials and witnesses said.

The earthquake was centered just 10 miles southwest of the crowded and impoverished capital of Port-au-Prince. Making matters worse, the earthquake was relatively shallow at a depth of five miles, the U.S. Geological Survey said. Shallow earthquakes can cause more damage.

"I think it's really a catastrophe of major proportions," Haiti's ambassador to the U.S., Raymond Alcide Joseph, told CNN.

A list of several individuals who are live-blogging the earthquake is here.    Doctors without Borders/Medecins sans frontieres is collecting donations to support their relief efforts in Haiti here.