QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

7km WSW of Santa Monica, CA

· 9.8 km deep · released about 41 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 35 kmVentura County 66 kmOrange County 81 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
9.8 km below the surface
Felt
11 reports · strongest reported intensity III
Nearest
Los Angeles County, 35 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3518 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 11 people have reported feeling it to USGS.

How big was it?

This earthquake released about 41 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 5.8 370,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 260,000× the energy of this one
  3. Around the size people start to feel M 3.0 23× the energy of this one
  4. This earthquake M 2.1 about 41 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 34.0022, -118.5592. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Los Angeles County, CA 35 km (22 mi) SW of here earthquakes near Los Angeles County
Ventura County, CA 66 km (41 mi) SE of here earthquakes near Ventura County
Orange County, CA 81 km (50 mi) WNW of here earthquakes near Orange County

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

Aftershocks so far

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

  1. 1.6 4 km NNW of Malibu, California
  2. 1.9 3 km NNW of Malibu, California
  3. 2.1 3 km NNW of Malibu, California
  4. 2.2 6 km NW of San Fernando, California
  5. 3.1 2 km WNW of Santa Monica, California
  6. 1.8 9 km SSW of Rancho Palos Verdes, California
  7. 1.8 1 km NNW of North Hills, California
  8. 1.9 2km SW of MacArthur Park, CA
  9. 1.7 4km N of Simi Valley, CA
  10. 1.7 2km S of Sherman Oaks, CA
  11. 1.6 3km E of Marina del Rey, CA
  12. 1.6 3km WSW of Lake View Terrace, CA
  13. 1.7 8km SE of Malibu, CA
  14. 2.1 4km SW of Baldwin Hills, CA
  15. 1.6 4km SSE of San Fernando, 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.