Earthquake · reviewed by a seismologist
M 2.1md
Earthquake near Coalinga, CA
No earthquake was likely felt in Coalinga in the 24 hours to 2:52 am PST (10:52 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 2.1 earthquake was recorded 29 km (18 mi) west-northwest of Coalinga, CA, at 6:28 pm PDT on 27 July 2019 (01:28 UTC), 16 km deep.
USGS: 16km SSE of New Idria, CA
94 km (58 mi) SW of Fresno, CA
- When
- 6:28 pm PDT on 27 July 2019 ()
- Where
- 29 km (18 mi) west-northwest of Coalinga, CA · earthquakes near Coalinga
- Magnitude
- M 2.1 (md)
- Depth
- 16 km below the surface
- Felt
- no reports yet
- Nearest
- San Benito County, 55 km NW
- Nearest mapped fault
- San Andreas fault, 14 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 2661 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 5 km (3 mi) from the epicentre. In Coalinga, 29 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 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
- Magna, Utah 2020 M 5.7 250,000× the energy of this one
- Around the size people start to feel M 3.0 22× the energy of this one
- This earthquake M 2.1 about 43 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 710 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 · 30 km E of this epicentre
- 6.4 1901 Parkfield, California Earthquake · 33 km SSE of this epicentre
- 6.1 Northwest of Huron, California · 25 km N of this epicentre
- 5.8 29 km NE of San Lucas, California · 12 km W of this epicentre
- 5.8 1934 Parkfield, California Earthquake · 48 km S 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 36.2788, -120.6368. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Benito County, CA | 55 km (34 mi) | NW | earthquakes near San Benito County |
| Monterey County, CA | 61 km (38 mi) | W | earthquakes near Monterey County |
| Kings County, CA | 77 km (48 mi) | ESE | earthquakes near Kings County |
| San Luis Obispo County, CA | 100 km (62 mi) | S | earthquakes near San Luis Obispo County |
| Merced County, CA | 102 km (63 mi) | N | earthquakes near Merced County |
| Fresno County, CA | 103 km (64 mi) | ENE | earthquakes near Fresno County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
36 earthquakes have been recorded within 50 km since this one.
- 2.4 12km ESE of Pinnacles, CA
- 1.5 23km E of San Ardo, CA
- 1.6 15km NW of Parkfield, CA
- 2.0 4km NNW of Huron, CA
- 1.7 9km SE of Pinnacles, CA
- 1.8 5km NW of Parkfield, CA
- 1.6 13km SW of Huron, CA
- 2.3 11km NW of Parkfield, CA
- 1.6 23km E of San Ardo, CA
- 1.7 8km ESE of Pinnacles, CA
- 2.0 10km NNW of New Idria, CA
- 1.9 19km SSW of Cantua Creek, CA
- 1.5 12km SE of Pinnacles, CA
- 1.8 3km SSE of San Ardo, CA
- 1.6 4km SSE of San Ardo, 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.