Earthquake · reviewed by a seismologist
M 1.7md
Earthquake near Coalinga, CA
No earthquake was likely felt in Coalinga in the 24 hours to 1:51 am PST (09:51 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 1.7 earthquake was recorded 10 km (6 mi) east of Coalinga, CA, at 2:36 am PST on 9 February 2023 (10:36 UTC), 11 km deep.
USGS: 10km E of Coalinga, CA
82 km (51 mi) SSW of Fresno, CA · 57 km (35 mi) WSW of Hanford, CA
- When
- 2:36 am PST on 9 February 2023 ()
- Where
- 10 km (6 mi) east of Coalinga, CA · earthquakes near Coalinga
- Magnitude
- M 1.7 (md)
- Depth
- 11 km below the surface
- Felt
- no reports yet
- Nearest
- Kings County, 39 km E
- Nearest mapped fault
- Great Valley thrust fault system, 9 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 1370 days ago
Earthquake alerts for Coalinga, CA
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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 7 km (4 mi) from the epicentre. In Coalinga, 10 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: Huron, Avenal, Kettleman City.
How big was it?
This earthquake released about 12 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,300,000× the energy of this one
- Magna, Utah 2020 M 5.7 900,000× the energy of this one
- Around the size people start to feel M 3.0 80× the energy of this one
- This earthquake M 1.7 about 12 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 4.3 on 2019-12-17 — about 6,900 times the energy of this one.
Before 2016, the USGS record lists 18 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 The 1983 Coalinga, California Earthquake · 12 km NNW of this epicentre
- 6.5 1922 Parkfield, California Earthquake · 43 km S of this epicentre
- 6.4 1901 Parkfield, California Earthquake · 28 km SW of this epicentre
- 6.0 2004 Parkfield, California Earthquake · 37 km SSW of this epicentre
- 5.8 1934 Parkfield, California Earthquake · 50 km SW 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 36.1400, -120.2472. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Kings County, CA | 39 km (25 mi) | E | earthquakes near Kings County |
| San Luis Obispo County, CA | 86 km (53 mi) | SSW | earthquakes near San Luis Obispo County |
| Fresno County, CA | 87 km (54 mi) | NE | earthquakes near Fresno County |
| San Benito County, CA | 92 km (57 mi) | NW | earthquakes near San Benito County |
| Monterey County, CA | 97 km (60 mi) | W | earthquakes near Monterey County |
| Merced County, CA | 125 km (78 mi) | NNW | earthquakes near Merced County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
55 earthquakes have been recorded within 50 km since this one.
- 1.6 2km NNE of New Idria, CA
- 1.8 25km E of San Ardo, CA
- 1.8 11km S of Kettleman City, CA
- 1.6 12km NW of Avenal, CA
- 1.6 2km NE of Cholame, CA
- 1.5 18km SE of New Idria, CA
- 1.7 6km NNE of Avenal, CA
- 1.5 4km SW of New Idria, CA
- 1.9 10km NW of Parkfield, CA
- 1.6 2km N of Cholame, CA
- 1.8 8km SW of Lemoore Station, CA
- 2.5 20km S of Kettleman City, CA
- 2.2 23km ENE of San Lucas, CA
- 2.2 4km SSW of Armona, CA
- 1.8 12km 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.