Is the Bay Area expecting an earthquake?
The threat of earthquakes extends across the entire San Francisco Bay region, and a major quake is likely before 2032.
What was the magnitude of the 1989 Bay Area earthquake?
On October 17, 1989, the San Francisco Bay area was jolted by the Loma Prieta earthquake. The quake’s epicenter was near Loma Prieta Peak in the Santa Cruz Mountains. The magnitude 6.9 quake was the most powerful the state had experienced in several years.
What’s the worst earthquake in California?
7.3 – Jan. 31, 1922. West of Eureka.
How many earthquakes have there been since the 1906 San Francisco?
In the 83 years prior to the 1906 quake, seven damaging earthquakes of magnitude 6.5 or greater occurred. Only two have occurred since the San Francisco earthquake. Several 5.0-plus seismic events in the two years preceding Loma Prieta also served as warnings.
How far away was the Loma Prieta earthquake felt?
The Loma Prieta quake was felt as far away as San Diego and western Nevada. A magnitude 5.2 aftershock occurred approximately 2.5 minutes after the main shock. In the week following Loma Prieta, 20 aftershocks magnitude 4.0 or greater and more than 300 of magnitude 2.5 or greater were recorded.
Where is the epicenter of the San Andreas earthquake?
The epicenter was on the San Andreas fault roughly 56 miles south of San Francisco and 10 miles northeast of Santa Cruz, near Mt. Loma Prieta in the Santa Cruz Mountains. The focal depth was 11 miles (typical California earthquake focal depths are 4 to 6 miles).