Earthquake · reviewed by a seismologist
M 1.8md
Earthquake near Oakhurst, CA
No earthquake was likely felt in Oakhurst in the 24 hours to 9:17 am PST (17:17 UTC). The last one was M 5.7, 230 km (143 mi) NNE, at 6:29 pm PDT on 13 April 2026, estimated intensity II (weak) in town; 6,515 felt reports to USGS. Every earthquake near Oakhurst
This page: a magnitude 1.8 earthquake was recorded 26 km (16 mi) northeast of Oakhurst, CA, at 4:19 pm PST on 18 February 2021 (00:19 UTC), 11 km deep.
USGS: 26km NE of Oakhurst, CA
84 km (52 mi) NNE of Fresno, CA
- When
- 4:19 pm PST on 18 February 2021 ()
- Where
- 26 km (16 mi) northeast of Oakhurst, CA · earthquakes near Oakhurst
- Magnitude
- M 1.8 (md)
- Depth
- 11 km below the surface
- Felt
- no reports yet
- Nearest
- Madera County, 41 km SW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2092 days ago
Earthquake alerts for Oakhurst, CA
Get a notification in this browser when USGS records an earthquake near Oakhurst, 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 8 km (5 mi) from the epicentre. In Oakhurst, 26 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: Ahwahnee.
How big was it?
This earthquake released about 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
- Magna, Utah 2020 M 5.7 810,000× the energy of this one
- Around the size people start to feel M 3.0 72× the energy of this one
- This earthquake M 1.8 about 13 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 4 earthquakes of M5 or more within 50 km:
- 5.7 14 km WSW of Aspen Springs, California · 49 km E of this epicentre
- 5.4 12 km SE of Mammoth Lakes, California · 50 km ENE of this epicentre
- 5.4 6 km ESE of Mammoth Lakes, California · 49 km ENE of this epicentre
- 5.3 3 km SE of Mammoth Lakes, California · 46 km ENE 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 37.4740, -119.4235. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Madera County, CA | 41 km (26 mi) | SW | earthquakes near Madera County |
| Mariposa County, CA | 44 km (28 mi) | WNW | earthquakes near Mariposa County |
| Mono County, CA | 69 km (43 mi) | NE | earthquakes near Mono County |
| Tuolumne County, CA | 77 km (48 mi) | NW | earthquakes near Tuolumne County |
| Fresno County, CA | 82 km (51 mi) | SSW | earthquakes near Fresno County |
| Merced County, CA | 119 km (74 mi) | WSW | earthquakes near Merced County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
56 earthquakes have been recorded within 50 km since this one.
- 1.6 21km ESE of Yosemite Valley, CA
- 1.6 13km SE of Mammoth Lakes, CA
- 2.1 29km ENE of Oakhurst, CA
- 1.5 29km NE of Oakhurst, CA
- 1.7 22km SW of Toms Place, CA
- 1.5 29km NE of Oakhurst, CA
- 1.9 23km ESE of Yosemite Valley, CA
- 2.7 7km SE of Mammoth Lakes, CA
- 1.7 23km ESE of Yosemite Valley, CA
- 1.8 2km E of Mammoth Lakes, CA
- 1.7 20km ESE of Yosemite Valley, CA
- 1.8 6km NNW of Ahwahnee, CA
- 2.0 6km SW of North Fork, CA
- 1.9 4km N of Shaver Lake, CA
- 2.4 8km ENE of North Fork, 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.