Exploring Nature in the San Francisco Bay Area

From the Inside Out

Workers digging the new fourth bore of the Caldecott Tunnel are getting a once-in-a-lifetime view of one of the defining features of the East Bay: the range of hills that runs from San Pablo Bay south to Fremont. By visiting just a few accessible sites aboveground, you can find clues that tell the story of how these hills rose from their humble origins as deep ocean sediments and volcanic flows to the iconic fault-riddled hillsides of today.

Got Quakes on the Mind?

With a handful of very noticeable earthquakes jolting the East Bay, we're getting a lot of questions about quakes -- do small ones release strain? Or foretell the Big One? We get the word from one of UC Berkeley's top seismologists.