Screenshot of the User Display of CISN ShakeAlert during the 2011 M3.3 Channel Island earthquake in Southern California.
Monday's 4.7 magnitude temblor centered in Riverside County didn't cause major damage. While it may have shaken a few coffee cups in L.A., seismologists at Caltech were ready for it.
California's Earthquake Early Warning System gave them a 30-second heads up, and that, in the future, might be enough to save lives. Thomas Heaton is the Director of the Earthquake Engineering Research Laboratory at Caltech joins the show with more.