QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

Earthquake near Westlake Village, CA

No earthquake was likely felt in Westlake Village in the 24 hours to 11:29 pm PST (07:29 UTC). The last one was M 2.3, 16 km (10 mi) SSW, at 4:53 am PDT on 16 October 2026, estimated intensity II (weak) in town; 2 felt reports to USGS. Every earthquake near Westlake Village

This page: a magnitude 2.1 earthquake was recorded 10 km (6 mi) southwest of Westlake Village, CA, at 9:09 am PDT on 25 April 2020 (16:09 UTC), 17 km deep. 3 people have reported feeling it to USGS.

USGS: 10km SW of Westlake Village, CA

11 km (7 mi) S of Thousand Oaks, CA · 45 km (28 mi) W of Los Angeles, CA

9:09 am PDT, Apr 25, 2020 · · 17 km deep · released about 46 lb of TNT

Every earthquake near Westlake Village Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Ventura County 37 kmLos Angeles County 59 kmOrange County 113 kmSanta Barbara County 116 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
9:09 am PDT on 25 April 2020 ()
Where
10 km (6 mi) southwest of Westlake Village, CA · earthquakes near Westlake Village
Magnitude
M 2.1 (ml)
Depth
17 km below the surface
Felt
3 reports · strongest reported intensity II
Nearest
Ventura County, 37 km NW
Nearest mapped fault
Malibu Coast fault, 6 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2390 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth, people at rest would likely notice it out to about 2 km (1 mi) from the epicentre. In Westlake Village, 10 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Earthquakes near other towns within 30 km: Thousand Oaks, Agoura Hills, Malibu, Oak Park, Agoura, Camarillo.

How big was it?

This earthquake released about 46 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 330,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 21× the energy of this one
  4. This earthquake M 2.1 about 46 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.

For this area

The largest earthquake within 50 km since 2016 was M 4.0 on 2020-01-02 — about 730 times the energy of this one.

Before 2016, the USGS record lists 16 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.7 Northridge, California, earthquake · 35 km ENE of this epicentre
  2. 5.9 1km ENE of Granada Hills, California · 42 km ENE of this epicentre
  3. 5.6 7km NNE of Simi Valley, California · 31 km NE of this epicentre
  4. 5.3 2 km SSW of Santa Monica, California · 38 km ESE of this epicentre
  5. 5.3 The 1973 Point Mugu, California Earthquake · 19 km SW of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 34.0962, -118.8942. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Ventura County, CA 37 km (23 mi) NW earthquakes near Ventura County
Los Angeles County, CA 59 km (37 mi) E earthquakes near Los Angeles County
Orange County, CA 113 km (70 mi) ESE earthquakes near Orange County
Santa Barbara County, CA 116 km (72 mi) WNW earthquakes near Santa Barbara 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. 3.1 1km N of San Fernando, CA
  2. 2.1 1km NNW of San Fernando, CA
  3. 2.1 1km ESE of Sylmar, CA
  4. 1.9 1km W of Sylmar, CA
  5. 2.1 1km WSW of Sylmar, CA
  6. 2.4 1km WSW of Sylmar, CA
  7. 2.5 1km WSW of Sylmar, CA
  8. 4.2 1km SE of Sylmar, CA
  9. 1.8 14km SSE of Malibu Beach, CA
  10. 1.6 10km S of Malibu Beach, CA
  11. 2.2 4km NNW of Santa Monica, CA
  12. 2.5 22km SE of Santa Cruz Is. (E end), CA
  13. 1.5 3km SW of San Fernando, CA
  14. 2.0 2km SW of San Fernando, CA
  15. 1.7 15km SSW of Thousand 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.