Earthquake · reviewed by a seismologist
M 3.4mw
20km E of Boron, CA
- When
- Magnitude
- M 3.4 (mw)
- Depth
- 1.8 km below the surface
- Felt
- 8 reports · strongest reported intensity III
- Measured shaking
- intensity V (ShakeMap)
- Nearest
- San Bernardino County, 114 km E
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3258 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 8 people have reported feeling it to USGS.
How big was it?
This earthquake released about 2.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 80,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 3,600× the energy of this one
- Magna, Utah 2020 M 5.7 2,500× the energy of this one
- This earthquake M 3.4 about 2.1 tons of TNT
- Around the size people start to feel M 3.0 this one released 4.4× 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 34.9698, -117.4272. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| San Bernardino County, CA | 114 km (71 mi) | W of here | earthquakes near San Bernardino County |
| Los Angeles County, CA | 115 km (71 mi) | NE of here | earthquakes near Los Angeles County |
| Kern County, CA | 126 km (78 mi) | ESE of here | earthquakes near Kern 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 5km NW of Boron, CA
- 1.6 4km NNW of Boron, CA
- 2.8 28km NNW of Barstow, CA
- 1.8 4km NNW of Boron, CA
- 1.6 5km NNW of Boron, CA
- 1.8 5km NW of Boron, CA
- 1.8 5km NNW of Boron, CA
- 1.7 5km NNW of Boron, CA
- 1.5 5km NNW of Boron, CA
- 1.8 4km NNW of Boron, CA
- 1.6 5km NNW of Boron, CA
- 1.6 5km NNW of Boron, CA
- 1.5 5km N of Boron, CA
- 1.8 5km NW of Boron, CA
- 1.9 6km NNW of Boron, 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.