Earthquake · reviewed by a seismologist
M 2.3ml
Earthquake near Oasis, CA
No earthquake was likely felt in Oasis in the 24 hours to 7:39 am PST (15:39 UTC). The last one was M 4.9, 144 km (89 mi) SE, at 10:27 am PST on 3 November 2026, estimated intensity II (weak) in town; 321 felt reports to USGS. Every earthquake near Oasis
This page: a magnitude 2.3 earthquake was recorded 18 km (11 mi) south-southwest of Oasis, CA, at 7:07 am PST on 11 December 2021 (15:07 UTC), 11 km deep. 1 person has reported feeling it to USGS.
USGS: 18km SSW of Oasis, CA
45 km (28 mi) S of Indio, CA · 105 km (65 mi) ENE of San Diego, CA
- When
- 7:07 am PST on 11 December 2021 ()
- Where
- 18 km (11 mi) south-southwest of Oasis, CA · earthquakes near Oasis
- Magnitude
- M 2.3 (ml)
- Depth
- 11 km below the surface
- Felt
- 1 report · strongest reported intensity II
- Nearest
- Riverside County, 48 km NNE
- Nearest mapped fault
- San Jacinto fault, 2 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 1796 days ago
Earthquake alerts for Oasis, 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 16 km (10 mi) from the epicentre. In Oasis, 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.
Earthquakes near other towns within 30 km: Desert Shores, Borrego Springs, Salton City, Mecca.
How big was it?
This earthquake released about 82 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
- Magna, Utah 2020 M 5.7 130,000× the energy of this one
- Around the size people start to feel M 3.0 12× the energy of this one
- This earthquake M 2.3 about 82 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 5.2 on 2016-06-10 — about 22,000 times the energy of this one.
Before 2016, the USGS record lists 16 earthquakes of M5 or more within 50 km; the five largest:
- 6.6 The 1968 Borrego Mountain, California Earthquake · 18 km SSE of this epicentre
- 6.6 The 1987 Superstition Hills, California Earthquake · 47 km SE of this epicentre
- 6.4 The 1954 San Jacinto Fault, California Earthquake · 10 km ESE of this epicentre
- 6.2 The 1987 Elmore Ranch, California Earthquake · 45 km SE of this epicentre
- 6.0 16km WSW of Oasis, CA · 10 km NW 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 33.3260, -116.1870. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Riverside County, CA | 48 km (30 mi) | NNE | earthquakes near Riverside County |
| San Diego County, CA | 64 km (40 mi) | WSW | earthquakes near San Diego County |
| Imperial County, CA | 84 km (52 mi) | ESE | earthquakes near Imperial County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
51 earthquakes have been recorded within 50 km since this one.
- 1.6 23km ESE of Anza, CA
- 2.0 23km ESE of Anza, CA
- 2.8 13km N of Borrego Springs, CA
- 1.5 23km ESE of Anza, CA
- 1.7 23km ESE of Anza, CA
- 1.8 23km ESE of Anza, CA
- 2.0 23km ESE of Anza, CA
- 1.7 23km ESE of Anza, CA
- 1.7 24km ESE of Anza, CA
- 2.1 23km ESE of Anza, CA
- 1.7 23km ESE of Anza, CA
- 2.9 23km ESE of Anza, CA
- 1.8 23km ESE of Anza, CA
- 1.9 24km SSW of La Quinta, CA
- 2.3 24km ESE of Anza, 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.