QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

2km SSE of Duarte, CA

· 8.9 km deep · released about 6.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 28 kmOrange County 53 kmVentura County 110 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 1.6 (ml)
Depth
8.9 km below the surface
Felt
no reports yet
Nearest
Los Angeles County, 28 km WNW
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.

How big was it?

This earthquake released about 6.4 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 2,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.6 about 6.4 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 34.1248, -117.9702. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Los Angeles County, CA 28 km (17 mi) ESE of here earthquakes near Los Angeles County
Orange County, CA 53 km (33 mi) NNW of here earthquakes near Orange County
Ventura County, CA 110 km (68 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

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

  1. 1.5 6 km SSE of Lytle Creek, California
  2. 2.0 8 km ENE of San Antonio Heights, California
  3. 2.0 5 km NW of Fontana, California
  4. 1.6 4 km SSE of Placentia, California
  5. 1.8 10 km ENE of Villa Park, California
  6. 2.4 4 km SSE of Lytle Creek, California
  7. 2.7 9 km SW of Corona, California
  8. 1.8 1 km NNW of North Hills, California
  9. 1.7 2 km N of East La Mirada, California
  10. 1.9 2 km N of East La Mirada, California
  11. 1.6 3 km SE of Sunset Beach, California
  12. 1.9 2km SW of MacArthur Park, CA
  13. 2.1 2km SE of Brea, CA
  14. 1.5 3km NE of Fontana, CA
  15. 1.7 2km S of Sherman Oaks, 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.