Earthquake · reviewed by a seismologist
M 1.9md
Earthquake near San Ramon, CA
No earthquake was likely felt in San Ramon in the 24 hours to 9:55 pm PST (05:55 UTC). The last one was M 2.1, 6 km (4 mi) NNE, at 7:18 am PDT on 31 October 2026, estimated intensity II (weak) in town; 1 felt report to USGS. Every earthquake near San Ramon
This page: a magnitude 1.9 earthquake was recorded 4 km (2 mi) east-northeast of San Ramon, CA, at 3:06 pm PST on 14 November 2022 (23:06 UTC), 8.8 km deep. 1 person has reported feeling it to USGS.
USGS: 4km ENE of San Ramon, CA
in San Ramon, CA · 42 km (26 mi) E of San Francisco, CA
- When
- 3:06 pm PST on 14 November 2022 ()
- Where
- 4 km (2 mi) east-northeast of San Ramon, CA · earthquakes near San Ramon
- Magnitude
- M 1.9 (md)
- Depth
- 8.8 km below the surface
- Felt
- 1 report · strongest reported intensity III
- Nearest
- Contra Costa County, 14 km N
- Nearest mapped fault
- Pleasanton fault, 2 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1450 days ago
Earthquake alerts for San Ramon, CA
Get a notification in this browser when USGS records an earthquake near San Ramon, CA. No account or email needed.
Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 11 km (7 mi) from the epicentre. In San Ramon, 4 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Likely felt in: San Ramon 4 km, intensity II · Danville 6 km, intensity II · Dublin 10 km, intensity II · Alamo 10 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 19 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 790,000× the energy of this one
- Magna, Utah 2020 M 5.7 560,000× the energy of this one
- Around the size people start to feel M 3.0 50× the energy of this one
- This earthquake M 1.9 about 19 lb of TNT
Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.
For this area
The largest earthquake within 50 km since 2016 was M 4.5 on 2019-10-15 — about 7,700 times the energy of this one.
Before 2016, the USGS record lists 7 earthquakes of M5 or more within 50 km; the five largest:
- 5.8 The 1980 Livermore, California Earthquake · 16 km ENE of this epicentre
- 5.7 15 km NE of East Foothills, California · 41 km SSE of this epicentre
- 5.5 6 km NNE of East Foothills, California · 42 km SSE of this epicentre
- 5.4 9 km NE of Livermore, California · 21 km ESE of this epicentre
- 5.3 The 1957 San Francisco, California Earthquake · 50 km WSW of this epicentre
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 37.7932, -121.9383. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Contra Costa County, CA | 14 km (9 mi) | N | earthquakes near Contra Costa County |
| Alameda County, CA | 16 km (10 mi) | S | earthquakes near Alameda County |
| Solano County, CA | 53 km (33 mi) | N | earthquakes near Solano County |
| San Mateo County, CA | 57 km (35 mi) | SW | earthquakes near San Mateo County |
| San Joaquin County, CA | 61 km (38 mi) | ENE | earthquakes near San Joaquin County |
| Santa Clara County, CA | 67 km (42 mi) | SSE | earthquakes near Santa Clara County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
43 earthquakes have been recorded within 50 km since this one.
- 1.9 3km E of Hayward, CA
- 2.0 2km ESE of Berkeley, CA
- 1.5 6km WNW of Sunol, CA
- 1.8 2km SE of Pacheco, CA
- 1.5 2km SE of Pacheco, CA
- 1.6 8km SE of Sunol, CA
- 1.7 2km N of San Leandro, CA
- 1.5 8km SSW of Livermore, CA
- 1.5 8km SSW of Brentwood, CA
- 2.0 2km NE of Danville, CA
- 1.9 2km W of Diablo, CA
- 1.9 2km NE of Danville, CA
- 1.7 9km NE of Blackhawk, CA
- 1.5 3km ESE of San Ramon, CA
- 2.7 3km NE of San Leandro, CA
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.