, however, was in a very remote location with no paved roads nearby, so it was difficult to reach and the media needed to go on government transport.
Looking ahead, scientists are trying to predict when the next major quake
Scientists hope to learn how and why quakes
occur by monitoring them at the focus, or the point deep beneath Earth's surface where rocks first break apart.
The waves can travel hundreds of miles before hitting the coast of Southern California, as was the case during Chile's 1960 earthquake and Anchorage's 1964 quake
Seismic instruments haven't been around long enough to provide researchers with a good idea of how often damaging quakes
strike a particular region over the ages.
Kate Hutton, a seismologist at the California Institute of Technology in Pasadena, said there was a one-in-20 chance that Tuesday's quake
was a foreshock to a larger quake
that could hit within five days.
1 on the Richter scale jolted the Izu islands south of Tokyo on Thursday night, about an hour after a quake
measuring 5 hit the region, the Meteorological Agency said.
In contrast, after the March 2005 quake
, the island's northwestern tip held a steady elevation, while the southeastern tip was lifted about 1.
I think about it all the time,'' said Amalie Orme, a professor at California State University, Northridge, whose Woodland Hills house was lifted entirely off the ground by the quake
San Andreas' largest recent quakes
occurred in 1906 and 1989, when the fault released huge amounts of pent-up pressure that ran beneath and along adjoining tectonic plates.
At least 20 large quakes
have shaken the city in the past 2,000 years.