Earthquake · reviewed by a seismologist
M 1.7md
Earthquake near Oakhurst, CA
No earthquake was likely felt in Oakhurst in the 24 hours to 9:16 am PST (17:16 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 1.7 earthquake was recorded 29 km (18 mi) northeast of Oakhurst, CA, at 7:04 am PDT on 19 August 2021 (14:04 UTC), 11 km deep.
USGS: 29km NE of Oakhurst, CA
86 km (53 mi) NNE of Fresno, CA
- When
- 7:04 am PDT on 19 August 2021 ()
- Where
- 29 km (18 mi) northeast of Oakhurst, CA · earthquakes near Oakhurst
- Magnitude
- M 1.7 (md)
- Depth
- 11 km below the surface
- Felt
- no reports yet
- Nearest
- Madera County, 44 km SW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1910 days ago
Earthquake alerts for Oakhurst, 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 6 km (4 mi) from the epicentre. In Oakhurst, 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 10 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 1,500,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
- Around the size people start to feel M 3.0 95× the energy of this one
- This earthquake M 1.7 about 10 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 2020-04-05 — about 3,600 times the energy of this one.
Before 2016, the USGS record lists 9 earthquakes of M5 or more within 50 km; the five largest:
- 6.0 7 km ENE of Mammoth Lakes, California · 48 km ENE of this epicentre
- 5.9 8 km NNE of Mammoth Lakes, California · 48 km ENE of this epicentre
- 5.9 11 km SE of Mammoth Lakes, California · 48 km ENE of this epicentre
- 5.7 14 km WSW of Aspen Springs, California · 45 km E of this epicentre
- 5.4 12 km SE of Mammoth Lakes, California · 46 km E 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 37.4818, -119.3888. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Madera County, CA | 44 km (27 mi) | SW | earthquakes near Madera County |
| Mariposa County, CA | 47 km (29 mi) | WNW | earthquakes near Mariposa County |
| Mono County, CA | 66 km (41 mi) | NE | earthquakes near Mono County |
| Tuolumne County, CA | 79 km (49 mi) | NW | earthquakes near Tuolumne County |
| Fresno County, CA | 84 km (52 mi) | SSW | earthquakes near Fresno County |
| Merced County, CA | 122 km (76 mi) | WSW | earthquakes near Merced County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
57 earthquakes have been recorded within 50 km since this one.
- 1.8 19km SE of Yosemite Valley, CA
- 2.1 19km SE of Yosemite Valley, CA
- 1.8 20km SE of Yosemite Valley, CA
- 1.7 16km WSW of Toms Place, CA
- 2.3 17km WSW of Toms Place, CA
- 1.9 17km WSW of Toms Place, CA
- 2.5 16km WSW of Toms Place, CA
- 2.0 30km ENE of Shaver Lake, CA
- 1.6 17km WSW of Toms Place, CA
- 1.8 29km NE of Oakhurst, CA
- 1.6 17km WSW of Mammoth Lakes, CA
- 1.9 30km NE of Oakhurst, CA
- 2.4 17km WSW of Mammoth Lakes, CA
- 1.5 32km ENE of Shaver Lake, CA
- 1.6 7km ENE of Mammoth Lakes, 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.