QuakeIndex

Earthquake · reviewed by a seismologist

M 4.4mw

4 km SSE of Highland Park, CA

· 11 km deep · released about 58 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 15 kmOrange County 58 kmVentura County 93 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 4.4 (mw)
Depth
11 km below the surface
Felt
24250 reports · strongest reported intensity V
Measured shaking
intensity V (ShakeMap)
USGS impact alert
green
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Nearest
Los Angeles County, 15 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 60 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 24250 people have reported feeling it to USGS.

How big was it?

This earthquake released about 58 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 2,900× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 130× the energy of this one
  3. Magna, Utah 2020 M 5.7 92× the energy of this one
  4. This earthquake M 4.4 about 58 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 120× more

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 34.0825, -118.1788. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Los Angeles County, CA 15 km (9 mi) SSE of here earthquakes near Los Angeles County
Orange County, CA 58 km (36 mi) NW of here earthquakes near Orange County
Ventura County, CA 93 km (58 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

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

  1. 1.8 1 km ENE of Valinda, CA
  2. 1.6 6 km W of Chatsworth, CA
  3. 1.6 2 km NNW of Orange, CA
  4. 1.5 2 km N of Orange, CA
  5. 1.6 2 km N of Orange, CA
  6. 1.7 3 km SSE of Highland Park, CA
  7. 1.7 4 km ESE of Yorba Linda, CA
  8. 1.7 5 km SSE of Highland Park, CA
  9. 1.5 3 km WNW of Rossmoor, CA
  10. 1.6 3 km SSW of Baldwin Hills, CA
  11. 2.0 5 km S of Highland Park, CA
  12. 1.7 2 km NNE of Villa Park, CA
  13. 1.8 2 km SSE of Rolling Hills, CA
  14. 1.6 4 km SSE of Highland Park, CA
  15. 2.0 2 km E of Hawthorne, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.5 on 2020-09-19 — it released about 1.7 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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