Yesterday's magnitude 6.4 earthquake in Ridgecrest, California, was the state's biggest temblor since the 1989 Loma Prieta quake. According to Business Insider, Thursday's quake ended a five-year earthquake drought in the state. Scientists warn that Californians could see either another, larger quake, or severe aftershocks, in the coming days. Indeed, a magnitude 6 aftershock struck Ridgecrest this morning. Keeping tabs on California's three major faults is an ongoing challenge for seismologists.
