Here are some facts about Sunday's 6.9 magnitude earthquake in Northern California:
Q: How big was this earthquake?
A: It was a major earthquake, larger in magnitude than the destructive 1994 Northridge quake, which was magnitude 6.7. In California the two most recent larger quakes were the 1999 Hector Mine temblor, magnitude 7.1, and the 1992 Landers quake, which was magnitude 7.3. In 2005, there was an offshore quake in Northern California that was magnitude 7.2.
Q: Why didn't Sunday's quake do more damage?
Q: Why is this area so seismically active?
A: The North Coast sits along the Mendocino Triple Junction, where three tectonic plates collide: the Pacific, North American and Juan de Fuca. It is one of the most seismically active parts of the San Andreas fault system that runs through the state.
Q: How far was the quake felt?
A: According to the
Q: How does this quake stack up compared to others?
A: Here are some major California quakes since 1990, courtesy the Associated Press, not including Sunday's temblor.
- 7.3, Landers, Calif., June 28, 1992, three deaths
- 7.2, Cape Mendocino, Calif., April 25, 1992
- 7.2, Off coast of Northern California, June 15, 2005
- 7.1, Hector Mine, Calif., Oct. 16, 1999
- 7.0, Honeydew, Calif., Aug. 17, 1991
- 7.0, Cape Mendocino, Calif., Sept. 1, 1994
- 6.7, Northridge, Jan. 17, 1994, 60 deaths
- 6.6, San Simeon, Calif., Dec. 22, 2003, 2 deaths
- 6.6, Off coast of Northern California, June 17, 2005
- 6.2, Joshua Tree, Calif., April 23, 1992