QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

2km NW of Seal Beach, CA

· 12 km deep · released about 38 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 33 kmLos Angeles County 51 kmVentura County 115 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
12 km below the surface
Felt
11 reports · strongest reported intensity IV
Nearest
Orange County, 33 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3640 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 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 33.7527, -118.1192. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 33 km (20 mi) WNW of here earthquakes near Orange County
Los Angeles County, CA 51 km (32 mi) SSE of here earthquakes near Los Angeles County
Ventura County, CA 115 km (72 mi) SE of here earthquakes near Ventura County

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

Aftershocks so far

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

  1. 1.6 3 km SE of Sunset Beach, California
  2. 1.9 2km SW of MacArthur Park, CA
  3. 2.1 2km SE of Brea, CA
  4. 1.6 3km E of Marina del Rey, CA
  5. 1.7 10km WNW of Corona, CA
  6. 2.1 4km SW of Baldwin Hills, CA
  7. 2.0 19km NNW of Avalon, CA
  8. 1.6 2km WSW of Lakewood, CA
  9. 1.6 2km SE of Hawthorne, CA
  10. 2.4 10km S of Rancho Palos Verdes, CA
  11. 1.9 2km NW of Willowbrook, CA
  12. 1.6 3km WSW of Compton, CA
  13. 1.6 1km ESE of Hawthorne, CA
  14. 1.9 1km SSE of View Park-Windsor Hills, CA
  15. 1.6 18km WSW of Manhattan Beach, 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.