quarry blast · reviewed by a seismologist
M 1.9ml
26km W of Ludlow, CA
- When
- Magnitude
- M 1.9 (ml)
- Depth
- -0.9 km below the surface
- Felt
- 1 report · strongest reported intensity III
- Nearest
- San Bernardino County, 27 km ENE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2763 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.
USGS catalogues this as quarry blast, not an earthquake.
How big was it?
This earthquake released about 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
- Magna, Utah 2020 M 5.7 500,000× the energy of this one
- Around the size people start to feel M 3.0 45× the energy of this one
- This earthquake M 1.9 about 21 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 34.7497, -116.4453. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| San Bernardino County, CA | 27 km (17 mi) | WSW of here | earthquakes near San Bernardino County |
| Riverside County, CA | 120 km (75 mi) | NNW of here | earthquakes near Riverside County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
36 earthquakes have been recorded within 50 km since this one.
- 1.9 18km SSW of Ludlow, CA
- 1.8 25km ENE of Barstow, CA
- 1.7 15km NW of Ludlow, CA
- 1.9 36km N of Yucca Valley, CA
- 1.6 28km N of Yucca Valley, CA
- 1.6 28km N of Yucca Valley, CA
- 1.8 27km N of Yucca Valley, CA
- 1.5 17km WNW of Ludlow, CA
- 3.1 26km NE of Barstow, CA
- 2.1 25km NE of Barstow, CA
- 3.0 36km SE of Fort Irwin, CA
- 1.9 24km E of Barstow, CA
- 2.3 22km NE of Barstow, CA
- 2.0 20km SSE of Fort Irwin, CA
- 1.9 20km SSW of Ludlow, 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 4.3 on 2016-02-20 — it released about 4,100 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.