Earthquake · reviewed by a seismologist
M 1.6md
Earthquake near Pleasanton, CA
No earthquake was likely felt in Pleasanton in the 24 hours to 2:52 am PST (10:52 UTC). The last one was M 1.9, 9 km (6 mi) W, at 10:32 am PST on 2 November 2026, estimated intensity II (weak) in town. Every earthquake near Pleasanton
This page: a magnitude 1.6 earthquake was recorded 8 km (5 mi) north-northeast of Pleasanton, CA, at 7:41 pm PDT on 23 August 2022 (02:41 UTC), 11 km deep.
USGS: 8km NNE of Pleasanton, CA
in Dublin, CA · 48 km (30 mi) N of San Jose, CA
- When
- 7:41 pm PDT on 23 August 2022 ()
- Where
- 8 km (5 mi) north-northeast of Pleasanton, CA · earthquakes near Pleasanton
- Magnitude
- M 1.6 (md)
- Depth
- 11 km below the surface
- Felt
- no reports yet
- Nearest
- Alameda County, 11 km SSW
- Nearest mapped fault
- Pleasanton fault, 5 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 1541 days ago
Earthquake alerts for Pleasanton, CA
Get a notification in this browser when USGS records an earthquake near Pleasanton, 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 3 km (2 mi) from the epicentre. In Pleasanton, 8 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.
Earthquakes near other towns within 30 km: Dublin, Livermore, Blackhawk, San Ramon, Diablo, Danville.
How big was it?
This earthquake released about 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
- Around the size people start to feel M 3.0 130× the energy of this one
- This earthquake M 1.6 about 7.6 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 19,000 times the energy of this one.
Before 2016, the USGS record lists 8 earthquakes of M5 or more within 50 km; the five largest:
- 6.2 Near San Jose, California · 48 km S of this epicentre
- 6.2 The 1984 Morgan Hill, California Earthquake · 49 km SSE of this epicentre
- 5.8 The 1980 Livermore, California Earthquake · 14 km NNE of this epicentre
- 5.7 15 km NE of East Foothills, California · 31 km SSE of this epicentre
- 5.5 6 km NNE of East Foothills, California · 34 km SSE 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 37.7295, -121.8498. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Alameda County, CA | 11 km (7 mi) | SSW | earthquakes near Alameda County |
| Contra Costa County, CA | 23 km (14 mi) | NNW | earthquakes near Contra Costa County |
| San Joaquin County, CA | 56 km (35 mi) | ENE | earthquakes near San Joaquin County |
| San Mateo County, CA | 58 km (36 mi) | SW | earthquakes near San Mateo County |
| Santa Clara County, CA | 58 km (36 mi) | SSE | earthquakes near Santa Clara County |
| Solano County, CA | 60 km (37 mi) | N | earthquakes near Solano County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
50 earthquakes have been recorded within 50 km since this one.
- 3.5 15km E of Seven Trees, CA
- 1.5 15km E of Seven Trees, CA
- 2.2 11km ESE of Alum Rock, CA
- 2.9 15km E of Seven Trees, CA
- 5.1 15km ESE of Alum Rock, CA
- 1.7 6km NNW of Lafayette, CA
- 2.5 10km E of Alum Rock, CA
- 1.6 5km NNE of Pleasanton, CA
- 1.5 10km NNE of Milpitas, CA
- 1.7 1km NE of Diablo, CA
- 1.5 2km S of Dublin, CA
- 1.8 2km NNW of Oakland, CA
- 1.8 9km NNE of Alum Rock, CA
- 1.9 3km WNW of Concord, CA
- 1.5 2km W of Concord, 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.