Earthquake · reviewed by a seismologist
M 2.8ml
2 km SW of Lake Henshaw, CA
- When
- Magnitude
- M 2.8 (ml)
- Depth
- 12 km below the surface
- Felt
- 141 reports · strongest reported intensity IV
- Nearest
- San Diego County, 23 km S
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1031 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 141 people have reported feeling it to USGS.
How big was it?
This earthquake released about 510 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 30,000× the energy of this one
- Magna, Utah 2020 M 5.7 21,000× the energy of this one
- Around the size people start to feel M 3.0 1.9× the energy of this one
- This earthquake M 2.8 about 510 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.
Where
Epicentre 33.2330, -116.7775. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| San Diego County, CA | 23 km (14 mi) | N of here | earthquakes near San Diego County |
| Riverside County, CA | 91 km (56 mi) | SW of here | earthquakes near Riverside County |
| Orange County, CA | 105 km (65 mi) | ESE of here | earthquakes near Orange County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
50 earthquakes have been recorded within 50 km since this one.
- 1.5 6 km WNW of Borrego Springs, CA
- 1.7 23 km NE of Pine Valley, CA
- 2.0 6 km W of Borrego Springs, CA
- 1.7 22 km ESE of Anza, CA
- 1.7 7 km N of Borrego Springs, CA
- 1.7 7 km W of Borrego Springs, CA
- 1.6 11 km ENE of Borrego Springs, CA
- 1.6 13 km SSE of Anza, CA
- 1.6 11 km SSW of Idyllwild, CA
- 1.6 15 km NE of Borrego Springs, CA
- 1.9 6 km W of Borrego Springs, CA
- 1.9 4 km NW of Lake Henshaw, CA
- 1.5 22 km ESE of Anza, CA
- 1.6 9 km NNW of Borrego Springs, CA
- 2.0 11 km ENE of Borrego Springs, 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.
For this area
The largest earthquake within 50 km in our catalogue was M 5.2 on 2016-06-10 — it released about 3,600 times the energy of this one.
From the QuakeIndex catalogue, built from the USGS FDSN event service.
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.