Bay Area residents got an early wake-up call today. 2:39 a.m. to be exact.
A 4.4 magnitude earthquake in Berkeley shook residents awake early Thursday morning. The quake struck on the Hayward Fault, which runs through the East Bay from El Sobrante down through Fremont. There hasn’t been a major quake on this fault since a 6.8 magnitude earthquake struck in Oct. 1868, causing massive destruction. U.S. Geological Survey scientists say the fault is “a tectonic time bomb,” due anytime for another big one.
Mouse over this USGS earthquake map to see the names of the fault lines (in red) nearest you. Zoom in and click on any recent quake for more specific location data and to view a map showing the quake’s geographical intensity range. Zoom out to see the locations and sizes of other recent earthquakes around the world. View a full-screen version of the map here.
For more on the science of earthquakes, check out KQED’s free e-book.