There's been rather a lot of activity lately, it seems. I'm subscribed to the "BigQuake" newsletter, which mails me whenever there is a 5.5 or better anywhere, and a 4.5 or better in the U.S.
http://earthquake.usgs.gov/products/..._services.html
And for a quick glance at volcanic activity, this is a cool link:
http://www.swvrc.org/alerts.htm