QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

5km NW of Chatsworth, CA

· 3.5 km deep · released about 9.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 36 kmVentura County 46 kmOrange County 105 kmKern County 117 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 1.7 (ml)
Depth
3.5 km below the surface
Felt
2 reports · strongest reported intensity III
Nearest
Los Angeles County, 36 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1236 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 9.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 99× the energy of this one
  4. This earthquake M 1.7 about 9.6 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 34.2935, -118.6383. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Los Angeles County, CA 36 km (23 mi) WNW of here earthquakes near Los Angeles County
Ventura County, CA 46 km (29 mi) E of here earthquakes near Ventura County
Orange County, CA 105 km (65 mi) NW of here earthquakes near Orange County
Kern County, CA 117 km (73 mi) S of here earthquakes near Kern County

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

Aftershocks so far

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

  1. 1.7 6 km E of Moorpark, CA
  2. 1.7 14 km SSW of Thousand Oaks, CA
  3. 1.5 10 km W of Malibu, CA
  4. 2.1 3 km NNE of Granada Hills, CA
  5. 1.7 10 km E of Santa Clarita, CA
  6. 1.7 1 km ENE of Lennox, CA
  7. 1.9 16 km N of Fillmore, CA
  8. 1.6 6km NNE of Chatsworth, CA
  9. 1.6 7km WNW of Castaic, CA
  10. 1.8 4km SSE of Highland Park, CA
  11. 2.0 18km W of Malibu, CA
  12. 2.5 17km NNW of Fillmore, CA
  13. 1.5 1km SSW of Century City, CA
  14. 1.8 16km N of Fillmore, CA
  15. 1.6 8km N of Chatsworth, 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 4.2 on 2023-01-25 — it released about 6,000 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.