QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

1km NNE of San Fernando, CA

· 7.4 km deep · released about 630 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 19 kmVentura County 65 kmOrange County 92 kmKern County 120 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 2.9 (ml)
Depth
7.4 km below the surface
Felt
400 reports · strongest reported intensity III
Measured shaking
intensity III (ShakeMap)
Nearest
Los Angeles County, 19 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1341 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 400 people have reported feeling it to USGS.

How big was it?

This earthquake released about 630 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 24,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 17,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.5× the energy of this one
  4. This earthquake M 2.9 about 630 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 34.2965, -118.4342. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Los Angeles County, CA 19 km (12 mi) NW of here earthquakes near Los Angeles County
Ventura County, CA 65 km (40 mi) E of here earthquakes near Ventura County
Orange County, CA 92 km (57 mi) NW of here earthquakes near Orange County
Kern County, CA 120 km (74 mi) SSE of here earthquakes near Kern County

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

Aftershocks so far

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

  1. 1.6 4km SSE of Piru, CA
  2. 2.2 7km SSW of Littlerock, CA
  3. 2.0 8km SE of Piru, CA
  4. 1.6 7km SSE of Littlerock, CA
  5. 2.0 11km N of Piru, CA
  6. 1.9 11km N of Piru, CA
  7. 2.4 11km N of Piru, CA
  8. 2.1 3km NE of Gardena, CA
  9. 3.2 10km SW of Valencia, CA
  10. 2.0 11km NNW of Piru, CA
  11. 2.6 2km WSW of Silver Lake, CA
  12. 1.5 0km SSW of View Park-Windsor Hills, CA
  13. 1.6 2km NW of Marina del Rey, CA
  14. 2.1 1km WSW of View Park-Windsor Hills, CA
  15. 3.3 1km SE of South Gate, 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 310 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.