Earthquake · reviewed by a seismologist
M 3.5ml
23km NNW of Borrego Springs, CA
- When
- Magnitude
- M 3.5 (ml)
- Depth
- 11 km below the surface
- Felt
- 186 reports · strongest reported intensity IV
- Measured shaking
- intensity V (ShakeMap)
- Nearest
- Riverside County, 49 km NE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1565 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 186 people have reported feeling it to USGS.
How big was it?
This earthquake released about 2.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.5 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 72,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 3,200× the energy of this one
- Magna, Utah 2020 M 5.7 2,300× the energy of this one
- This earthquake M 3.5 about 2.3 tons of TNT
- Around the size people start to feel M 3.0 this one released 4.9× more
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 33.4593, -116.4243. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Riverside County, CA | 49 km (31 mi) | SW of here | earthquakes near Riverside County |
| San Diego County, CA | 58 km (36 mi) | NE of here | earthquakes near San Diego County |
| Imperial County, CA | 110 km (68 mi) | WNW of here | earthquakes near Imperial 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.
- 1.9 19km ESE of Anza, CA
- 1.8 23km ESE of Anza, CA
- 1.9 23km ESE of Anza, CA
- 2.5 23km ESE of Anza, CA
- 2.4 20km ESE of Anza, CA
- 1.7 7km ENE of Anza, CA
- 2.9 24km ESE of Anza, CA
- 1.6 9km NE of Borrego Springs, CA
- 2.4 23km SSW of La Quinta, CA
- 1.6 18km ESE of Anza, CA
- 1.9 3km WNW of Lake Henshaw, CA
- 1.6 17km ESE of Julian, CA
- 1.9 23km SSW of La Quinta, CA
- 1.9 23km SSW of La Quinta, CA
- 1.6 20km 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.
For this area
The largest earthquake within 50 km in our catalogue was M 5.2 on 2016-06-10 — it released about 390 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.