Garlock Fault
California, USA · continental transform · 375.1 km of mapped active fault in 3 traces
unknown as of 7 November 2026.
no baseline good enough to compare against; the catalogue holds too few events on this system to say what normal is
| Window | the last 30.0 days |
|---|---|
| Earthquakes counted | 0 at M4.5 or above |
| Expected in that window | 0.00 |
What this system normally does
From 1995 to 2025 the catalogue holds 5 earthquakes of M4.5 or larger attributable to this system: about 0.17 a year. That figure is what "elevated" on this page is measured against.
Confidence in that rate is low: the catalogue holds too few events here for the average to carry much weight, and this system is never called elevated on the strength of it alone.
The fault itself
| Mapped length | 375.1 km |
|---|---|
| Traces | 3 |
| Tectonic setting | continental transform |
| Slip types | Sinistral |
| Depth attributed to it | down to 50.0 km |
| Extent | 34.82 to 35.60 latitude, -118.92 to -116.38 longitude |
Who to listen to if you live here
California Geological Survey is the agency that tells people on this system what to do. https://www.conservation.ca.gov/cgs/earthquakes (in English)
Other systems in California, USA
Where these numbers come from
Fault geometry, length and segment counts: GEM Global Active Faults Database (GEM GAF-DB), GEM Foundation, https://github.com/GEMScienceTools/gem-global-active-faults Licence: CC-BY-SA-4.0. Figures derived from it here are offered under the same licence. Earthquake counts, magnitudes and depths: United States Geological Survey, public domain. The activity judgement is ours, computed from those two inputs, and is not a statement by either agency.