Earthquake · reviewed by a seismologist
M 1.7ml
40km SW of Ludlow, CA
- When
- Magnitude
- M 1.7 (ml)
- Depth
- 1.8 km below the surface
- Felt
- no reports yet
- Nearest
- San Bernardino County, 49 km NE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2403 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
How big was it?
This earthquake released about 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
- Magna, Utah 2020 M 5.7 970,000× the energy of this one
- Around the size people start to feel M 3.0 86× the energy of this one
- This earthquake M 1.7 about 11 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 34.5070, -116.5127. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| San Bernardino County, CA | 49 km (31 mi) | SW of here | earthquakes near San Bernardino County |
| Riverside County, CA | 98 km (61 mi) | NNW of here | earthquakes near Riverside County |
| Orange County, CA | 149 km (92 mi) | NE of here | earthquakes near Orange 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.
- 1.7 17km ENE of Lucerne Valley, CA
- 1.7 22km N of Yucca Valley, CA
- 1.6 7km ENE of Big Bear City, CA
- 1.9 19km SSW of Ludlow, CA
- 1.7 19km N of Yucca Valley, CA
- 1.6 9km NW of Morongo Valley, CA
- 1.6 35km NE of Lucerne Valley, CA
- 2.1 36km WSW of Ludlow, CA
- 2.6 25km WNW of Ludlow, CA
- 2.0 10km N of Big Bear Lake, CA
- 1.8 22km N of Yucca Valley, CA
- 1.5 37km WSW of Ludlow, CA
- 1.6 5km N of Yucca Valley, CA
- 1.7 17km WNW of Morongo Valley, CA
- 3.0 35km ENE of Lucerne Valley, 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 7,900 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.