QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

4km N of Topanga, CA

· 4.8 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 33 kmVentura County 54 kmOrange County 92 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
4.8 km below the surface
Felt
10 reports · strongest reported intensity III
Nearest
Los Angeles County, 33 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1643 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 10 people have reported feeling it to USGS.

How big was it?

This earthquake released about 14 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 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× the energy of this one
  4. This earthquake M 1.8 about 14 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 34.1268, -118.6117. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Los Angeles County, CA 33 km (21 mi) WSW of here earthquakes near Los Angeles County
Ventura County, CA 54 km (34 mi) ESE of here earthquakes near Ventura County
Orange County, CA 92 km (57 mi) WNW of here earthquakes near Orange County

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

Aftershocks so far

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

  1. 2.4 13km W of Palos Verdes Estates, CA
  2. 2.3 12km WSW of Manhattan Beach, CA
  3. 2.2 12km WSW of Manhattan Beach, CA
  4. 2.3 1km S of View Park-Windsor Hills, CA
  5. 2.0 11km SW of Marina del Rey, CA
  6. 1.5 1km NNE of Maywood, CA
  7. 1.7 2km E of Carson, CA
  8. 1.9 17km W of Malibu, CA
  9. 1.6 2km SSE of Granada Hills, CA
  10. 1.8 4km ESE of Gardena, CA
  11. 1.5 2km SSW of Culver City, CA
  12. 1.8 2km SSW of Culver City, CA
  13. 1.8 6km WSW of Valencia, CA
  14. 1.9 6km WSW of Valencia, CA
  15. 2.5 2km N 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.5 on 2020-09-19 — it released about 14,000 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.