Earthquake · reviewed by a seismologist
M 2.3md
Earthquake near Fairview, CA
No earthquake was likely felt in Fairview in the 24 hours to 5:57 am PST (13:57 UTC). The last one was M 1.9, 6 km (4 mi) E, at 10:32 am PST on 2 November 2026, estimated intensity II (weak) in town. Every earthquake near Fairview
This page: a magnitude 2.3 earthquake was recorded 4 km (3 mi) northeast of Fairview, CA, at 8:58 pm PST on 28 December 2021 (04:58 UTC), 7.2 km deep. 27 people have reported feeling it to USGS.
USGS: 4km NE of Fairview, CA
10 km (6 mi) SW of San Ramon, CA · 37 km (23 mi) ESE of San Francisco, CA
- When
- 8:58 pm PST on 28 December 2021 ()
- Where
- 4 km (3 mi) northeast of Fairview, CA · earthquakes near Fairview
- Magnitude
- M 2.3 (md)
- Depth
- 7.2 km below the surface
- Felt
- 27 reports · strongest reported intensity III
- Nearest
- Alameda County, 11 km SE
- Nearest mapped fault
- Calaveras fault, 6 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 1773 days ago
Earthquake alerts for Fairview, CA
Get a notification in this browser when USGS records an earthquake near Fairview, 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 18 km (11 mi) from the epicentre. In Fairview, 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: Castro Valley 7 km, intensity II · Dublin 7 km, intensity II · Hayward 7 km, intensity II · San Ramon 9 km, intensity II · San Lorenzo 11 km, intensity II · Union City 12 km, intensity II · San Leandro 13 km, intensity II · Danville 13 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 82 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
- Magna, Utah 2020 M 5.7 130,000× the energy of this one
- Around the size people start to feel M 3.0 12× the energy of this one
- This earthquake M 2.3 about 82 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 1,800 times the energy of this one.
Before 2016, the USGS record lists 9 earthquakes of M5 or more within 50 km; the five largest:
- 7.9 The 1906 San Francisco, California Earthquake · 47 km W of this epicentre
- 6.2 Near San Jose, California · 49 km SSE of this epicentre
- 5.8 The 1980 Livermore, California Earthquake · 26 km NE of this epicentre
- 5.7 15 km NE of East Foothills, California · 38 km SE of this epicentre
- 5.5 6 km NNE of East Foothills, California · 37 km SE 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 37.7062, -122.0135. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Alameda County, CA | 11 km (7 mi) | SE | earthquakes near Alameda County |
| Contra Costa County, CA | 24 km (15 mi) | NNE | earthquakes near Contra Costa County |
| San Mateo County, CA | 45 km (28 mi) | SW | earthquakes near San Mateo County |
| Santa Clara County, CA | 61 km (38 mi) | SSE | earthquakes near Santa Clara County |
| Solano County, CA | 63 km (39 mi) | N | earthquakes near Solano County |
| San Joaquin County, CA | 70 km (43 mi) | ENE | earthquakes near San Joaquin County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
57 earthquakes have been recorded within 50 km since this one.
- 1.6 2km ESE of Hayward, CA
- 2.0 8km ENE of Milpitas, CA
- 1.7 16km SSE of Livermore, CA
- 1.9 4km NNW of Crockett, CA
- 1.5 8km WSW of Brentwood, CA
- 2.3 4km SSE of Vallejo, CA
- 2.8 1km ENE of El Cerrito, CA
- 1.7 9km ENE of Alum Rock, CA
- 1.8 5km ESE of Blackhawk, CA
- 1.8 14km SE of Livermore, CA
- 1.6 10km NNE of Alum Rock, CA
- 1.6 5km E of Vallejo, CA
- 1.6 8km NNE of Milpitas, CA
- 1.8 19km SSE of Livermore, CA
- 2.0 1km NW 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.