Earthquake · reviewed by a seismologist
M 3.5mw
Earthquake near Corcoran, CA
No earthquake was likely felt in Corcoran in the 24 hours to 7:07 pm PST (03:07 UTC). The last one was M 2.9, 8 km (5 mi) WNW, at 11:37 am PDT on 21 August 2026, estimated intensity II (weak) in town. Every earthquake near Corcoran
This page: a magnitude 3.5 earthquake was recorded 18 km (11 mi) west-southwest of Corcoran, CA, at 10:43 pm PST on 4 February 2018 (06:43 UTC), 22 km deep. 166 people have reported feeling it to USGS.
USGS: 18km WSW of Corcoran, CA
83 km (51 mi) S of Fresno, CA · 33 km (20 mi) SSW of Hanford, CA
- When
- 10:43 pm PST on 4 February 2018 ()
- Where
- 18 km (11 mi) west-southwest of Corcoran, CA · earthquakes near Corcoran
- Magnitude
- M 3.5 (mw)
- Depth
- 22 km below the surface
- Felt
- 166 reports · strongest reported intensity IV
- Measured shaking
- intensity II (ShakeMap)
- Nearest
- Kings County, 7 km WNW
- Nearest mapped fault
- Great Valley thrust fault system, 16 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 3115 days ago
Earthquake alerts for Corcoran, CA
Get a notification in this browser when USGS records an earthquake near Corcoran, 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 small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
At this magnitude and depth, people at rest would likely notice it out to about 58 km (36 mi) from the epicentre. In Corcoran, 18 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: Corcoran 18 km, intensity II · Kettleman City 20 km, intensity II · Lemoore 29 km, intensity II · Avenal 35 km, intensity II · Huron 37 km, intensity II · Lost Hills 47 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 2.5 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.5 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 68,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 3,000× the energy of this one
- Magna, Utah 2020 M 5.7 2,100× the energy of this one
- This earthquake M 3.5 about 2.5 tons of TNT
- Around the size people start to feel M 3.0 this one released 5.2× more
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
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:
- 5.6 8 km SW of Huron, California · 39 km WNW 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 36.0410, -119.7465. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Kings County, CA | 7 km (4 mi) | WNW | earthquakes near Kings County |
| Fresno County, CA | 80 km (50 mi) | N | earthquakes near Fresno County |
| Tulare County, CA | 89 km (55 mi) | ENE | earthquakes near Tulare County |
| San Luis Obispo County, CA | 96 km (60 mi) | SW | earthquakes near San Luis Obispo County |
| Kern County, CA | 120 km (75 mi) | SE | earthquakes near Kern County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
58 earthquakes have been recorded within 50 km since this one.
- 1.7 12km ENE of Coalinga, CA
- 2.1 5km SSE of Avenal, CA
- 1.6 11km SW of Huron, CA
- 1.6 5km ESE of Avenal, CA
- 2.3 13km ESE of Coalinga, CA
- 2.2 12km ESE of Coalinga, CA
- 1.8 8km NNE of Kettleman City, CA
- 2.1 9km NE of Avenal, CA
- 1.9 6km NNE of Avenal, CA
- 2.1 18km WSW of Corcoran, CA
- 1.9 12km SE of Coalinga, CA
- 1.5 13km SW of Huron, CA
- 1.9 7km NNW of Avenal, CA
- 2.1 6km SE of Huron, CA
- 1.6 9km E of Coalinga, 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.