6.And so as people across Southern California woke up Saturday morning grateful for being spared this time, there was the sense that Friday night's temblor could have been just a foretaste of something bigger.
7.In the 1970s, seismologists were surprised that an earthquake near Bishop, Calif., began a sequence of temblors around Mammoth Lakes that eventually spread over a diameter of more than 50 miles and included a half-dozen earthquakes of more than 6.0 magnitude.