QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

3km S of Compton, CA

· 8.1 km deep · released about 38 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 37 kmOrange County 46 kmVentura County 100 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 2.1 (ml)
Depth
8.1 km below the surface
Felt
18 reports · strongest reported intensity IV
Nearest
Los Angeles County, 37 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3672 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 18 people have reported feeling it to USGS.

How big was it?

This earthquake released about 38 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 390,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 280,000× the energy of this one
  3. Around the size people start to feel M 3.0 25× the energy of this one
  4. This earthquake M 2.1 about 38 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 33.8682, -118.2197. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Los Angeles County, CA 37 km (23 mi) S of here earthquakes near Los Angeles County
Orange County, CA 46 km (29 mi) WNW of here earthquakes near Orange County
Ventura County, CA 100 km (62 mi) ESE of here earthquakes near Ventura County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 2.4 1km ENE of Brea, CA
  2. 1.7 7km WSW of Huntington Beach, CA
  3. 1.6 2km N of Costa Mesa, CA
  4. 2.1 7km WSW of Huntington Beach, CA
  5. 1.8 18km SSW of Rancho Palos Verdes, CA
  6. 2.1 7km WSW of Santa Monica, CA
  7. 1.9 19km S of Malibu Beach, CA
  8. 1.7 6km SW of Chino Hills, CA
  9. 1.6 4km N of Yorba Linda, CA
  10. 2.0 3km WSW of Panorama City, CA
  11. 2.3 14km SSE of Malibu Beach, CA
  12. 1.6 4km WSW of Compton, CA
  13. 2.5 2km NNE of Costa Mesa, CA
  14. 2.0 2km ESE of Rowland Heights, CA
  15. 2.1 4km W of Costa Mesa, 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

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