QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

33km WSW of Ludlow, CA

· 1.9 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Bernardino County 37 kmRiverside County 114 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 1.5 (ml)
Depth
1.9 km below the surface
Felt
no reports yet
Nearest
San Bernardino County, 37 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1943 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 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 34.6618, -116.5143. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Bernardino County, CA 37 km (23 mi) SW of here earthquakes near San Bernardino County
Riverside County, CA 114 km (71 mi) NNW of here earthquakes near Riverside County
Orange County, CA 160 km (99 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

44 earthquakes have been recorded within 50 km since this one.

  1. 1.7 18km WSW of Ludlow, CA
  2. 2.5 11km E of Big Bear City, CA
  3. 1.8 8km N of Big Bear City, CA
  4. 2.1 8km N of Big Bear City, CA
  5. 1.9 36km WSW of Ludlow, CA
  6. 1.6 36km N of Yucca Valley, CA
  7. 1.8 40km ENE of Lucerne Valley, CA
  8. 2.1 39km SSE of Fort Irwin, CA
  9. 2.6 36km NE of Lucerne Valley, CA
  10. 1.5 39km NE of Big Bear City, CA
  11. 2.6 20km S of Fort Irwin, CA
  12. 2.0 18km SW of Ludlow, CA
  13. 2.2 14km WSW of Ludlow, CA
  14. 1.6 12km ESE of Lucerne Valley, CA
  15. 1.8 26km N of Yucca 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 16,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.