Earthquake · reviewed by a seismologist
M 1.7md
Earthquake near Coalinga, CA
No earthquake was likely felt in Coalinga in the 24 hours to 3:37 am PST (11:37 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 12 km (7 mi) east-northeast of Coalinga, CA, at 2:56 am PDT on 22 July 2018 (09:56 UTC), 16 km deep.
USGS: 12km ENE of Coalinga, CA
78 km (49 mi) SSW of Fresno, CA · 55 km (34 mi) WSW of Hanford, CA
- When
- 2:56 am PDT on 22 July 2018 ()
- Where
- 12 km (7 mi) east-northeast of Coalinga, CA · earthquakes near Coalinga
- Magnitude
- M 1.7 (md)
- Depth
- 16 km below the surface
- Felt
- no reports yet
- Nearest
- Kings County, 40 km ESE
- Nearest mapped fault
- Great Valley thrust fault system, 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 3033 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 it was probably too small to be felt, even directly above it. In Coalinga, 12 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.
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 1,200,000× the energy of this one
- Magna, Utah 2020 M 5.7 870,000× the energy of this one
- Around the size people start to feel M 3.0 78× 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
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record lists 19 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 The 1983 Coalinga, California Earthquake · 9 km NW of this epicentre
- 6.5 1922 Parkfield, California Earthquake · 48 km S of this epicentre
- 6.4 1901 Parkfield, California Earthquake · 31 km SW of this epicentre
- 6.1 Northwest of Huron, California · 48 km NW of this epicentre
- 6.0 2004 Parkfield, California Earthquake · 42 km SSW 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 36.1773, -120.2380. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Kings County, CA | 40 km (25 mi) | ESE | earthquakes near Kings County |
| Fresno County, CA | 83 km (52 mi) | NE | earthquakes near Fresno County |
| San Luis Obispo County, CA | 90 km (56 mi) | SSW | earthquakes near San Luis Obispo County |
| San Benito County, CA | 90 km (56 mi) | WNW | earthquakes near San Benito County |
| Monterey County, CA | 97 km (60 mi) | W | earthquakes near Monterey County |
| Merced County, CA | 121 km (75 mi) | NNW | earthquakes near Merced County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
59 earthquakes have been recorded within 50 km since this one.
- 1.6 9km NE of Coalinga, CA
- 1.6 2km NE of Avenal, CA
- 1.5 2km WSW of Avenal, CA
- 2.3 1km ESE of Avenal, CA
- 1.7 3km NE of Avenal, CA
- 1.9 23km NW of Parkfield, CA
- 1.6 10km SE of New Idria, CA
- 2.0 8km S of Kettleman City, CA
- 2.4 19km SW of Cantua Creek, CA
- 3.0 24km ENE of San Ardo, CA
- 3.3 24km ENE of San Ardo, CA
- 1.7 8km ENE of Coalinga, CA
- 2.0 25km NW of Parkfield, CA
- 1.6 18km NW of Coalinga, CA
- 1.5 23km S of Kettleman City, 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.