The estimated 7.0 magnitude earthquake that struck Haiti yesterday was the worst in more than 200 years. We’ll speak with Leonardo Seeber, a seismologist and senior researcher at Columbia University’s Lamont-Doherty Earth Observatory.

U.S. State Department hotline for contacting relatives in Haiti: 1-888-407-4747.

More Haiti Resources: Twitter List from NPR | Twitter List from NYTimes | How You Can Help: The Takeaway’s List of Relief Organizations