Bixby Bridge on the rugged Pacific coast of Big Sur, California
Photo:Austin Neill

California (San Andreas)

The right-lateral strike-slip San Andreas Fault system accommodates ~35 mm/yr of transform motion between the Pacific and North American plates, threatening the major urban centers of Los Angeles and San Francisco.

Danger Level (72h)

72-hour composite hazard forecast

--

Recent Quakes (14d)

Recorded in the selected 14d period

--

Max Magnitude (14d)

Largest earthquake in the selected 14d period

--

Tectonic Profile

Seismotectonic hazard assessment, structural exposure & historical context

Associated Faults4

Click to locate on map

Regional PopulationLandScan

--

Living within seismically active radius (~300 km)

Building VulnerabilityModerate

--

Mixed construction stock with regional engineering standards

Tectonic Setting

Transform / Strike-Slip

High Hazard

Active fault boundary with frequent seismicity

Seismically Stable Period

No significant earthquakes recorded in the selected 14d period.

PAGER GREEN
Filter:
•
Sort by:
••
LIVE
Oct 22, 08:35:04 PM
0/ 0

Seismic Activity

Every recorded earthquake in this area — filter by time range and sort by time or severity.

No earthquake activity data available for this period.

Regional Volcanism & Monitored Vents

Active vents and Holocene volcanic structures within the monitored boundary (California (San Andreas)) · 10

1917
Lassen Volcanic Center
Stratovolcano
3.2 km
1790
Mono Lake Volcanic Field
Volcanic field
2.1 km
1380
Mono-Inyo Craters
Lava dome
2.8 km
1260
Mammoth Mountain
Lava dome
3.4 km
1250
Shasta
Stratovolcano
4.3 km
1060
Medicine Lake
Shield volcano
2.4 km
210
Salton Buttes
Lava dome
0.0 km
150 BCE
Ubehebe Craters
Maar
0.8 km
—
Clear Lake Volcanic Field
Volcanic field
1.4 km
—
Soda Lakes
Maar
1.3 km
Catalogue: Smithsonian Institution, Global Volcanism Program.Volcanoes of the World