QuakeIndex

Earthquake · automatic estimate, may change

M 1.8ml

4km SW of MacArthur Park, CA

· 7.0 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 20 kmOrange County 62 kmVentura County 85 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 1.8 (ml)
Depth
7.0 km below the surface
Felt
no reports yet
Nearest
Los Angeles County, 20 km NNE
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 2599 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 17 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 870,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 620,000× the energy of this one
  3. Around the size people start to feel M 3.0 55× the energy of this one
  4. This earthquake M 1.8 about 17 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 34.0240, -118.3037. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Los Angeles County, CA 20 km (12 mi) SSW of here earthquakes near Los Angeles County
Orange County, CA 62 km (39 mi) NW of here earthquakes near Orange County
Ventura County, CA 85 km (53 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

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

  1. 1.5 1km W of Willowbrook, CA
  2. 1.8 3km SE of Rowland Heights, CA
  3. 1.6 2km SSE of Granada Hills, CA
  4. 2.0 4km NNW of Villa Park, CA
  5. 1.7 3km NE of Granada Hills, CA
  6. 2.4 3km NNE of Granada Hills, CA
  7. 3.6 4km NNE of Granada Hills, CA
  8. 2.3 5km E of Seal Beach, CA
  9. 1.7 4km S of Huntington Beach, CA
  10. 1.6 1km SE of Compton, CA
  11. 1.9 2km NNE of Maywood, CA
  12. 2.9 3km ENE of Brea, CA
  13. 2.1 3km NE of Brea, CA
  14. 1.5 4km ENE of Brea, CA
  15. 3.2 2km ENE of Brea, 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.