Earthquake · reviewed by a seismologist
M 1.9md
Earthquake near Coalinga, CA
No earthquake was likely felt in Coalinga in the 24 hours to 6:05 am PST (14:05 UTC). The last one was M 2.3, 4 km (3 mi) SE, at 1:44 am PDT on 4 October 2026, estimated intensity II (weak) in town. Every earthquake near Coalinga
This page: a magnitude 1.9 earthquake was recorded 33 km (20 mi) west of Coalinga, CA, at 5:08 am PDT on 29 May 2021 (12:08 UTC), 6.7 km deep.
USGS: 22km NE of San Ardo, CA
- When
- 5:08 am PDT on 29 May 2021 ()
- Where
- 33 km (20 mi) west of Coalinga, CA · earthquakes near Coalinga
- Magnitude
- M 1.9 (md)
- Depth
- 6.7 km below the surface
- Felt
- no reports yet
- Nearest
- Monterey County, 54 km W
- Nearest mapped fault
- San Andreas fault, under 1 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 1983 days ago
Earthquake alerts for Coalinga, CA
Get a notification in this browser when USGS records an earthquake near Coalinga, 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 13 km (8 mi) from the epicentre. In Coalinga, 33 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.
How big was it?
This earthquake released about 23 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 5.8 660,000× the energy of this one
- Magna, Utah 2020 M 5.7 470,000× the energy of this one
- Around the size people start to feel M 3.0 42× the energy of this one
- This earthquake M 1.9 about 23 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 4.0 on 2018-11-27 — about 1,300 times the energy of this one.
Before 2016, the USGS record lists 20 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 The 1983 Coalinga, California Earthquake · 38 km ENE of this epicentre
- 6.4 1901 Parkfield, California Earthquake · 26 km SE of this epicentre
- 6.1 Northwest of Huron, California · 40 km NNE of this epicentre
- 6.0 2004 Parkfield, California Earthquake · 49 km SE of this epicentre
- 5.8 29 km NE of San Lucas, California · 17 km NNW 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 36.1502, -120.7242. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Monterey County, CA | 54 km (34 mi) | W | earthquakes near Monterey County |
| San Benito County, CA | 61 km (38 mi) | NNW | earthquakes near San Benito County |
| Kings County, CA | 82 km (51 mi) | E | earthquakes near Kings County |
| San Luis Obispo County, CA | 88 km (55 mi) | SSE | earthquakes near San Luis Obispo County |
| Merced County, CA | 116 km (72 mi) | N | earthquakes near Merced County |
| Fresno County, CA | 117 km (73 mi) | NE | earthquakes near Fresno County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
23 earthquakes have been recorded within 50 km since this one.
- 1.7 12km E of Coalinga, CA
- 2.8 22km ENE of San Lucas, CA
- 3.1 8km NW of Parkfield, CA
- 3.1 9km NW of Parkfield, CA
- 2.3 6km NW of Parkfield, CA
- 1.8 6km ESE of San Lucas, CA
- 1.9 11km SE of Pinnacles, CA
- 2.8 12km SE of Pinnacles, CA
- 2.3 6km E of New Idria, CA
- 2.2 23km SW of New Idria, CA
- 1.9 8km ESE of Pinnacles, CA
- 1.6 10km NW of Parkfield, CA
- 2.4 12km NW of Parkfield, CA
- 1.8 10km NW of Parkfield, CA
- 1.6 21km NW of Parkfield, 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.