QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

2km ENE of Simi Valley, CA

· 10 km deep · released about 6.2 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Ventura County 39 kmLos Angeles County 43 kmOrange County 110 kmKern County 119 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 1.5 (ml)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Ventura County, 39 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2984 days ago

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

How big was it?

This earthquake released about 6.2 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.5 about 6.2 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 34.2745, -118.7205. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Ventura County, CA 39 km (24 mi) ESE of here earthquakes near Ventura County
Los Angeles County, CA 43 km (27 mi) WNW of here earthquakes near Los Angeles County
Orange County, CA 110 km (68 mi) NW of here earthquakes near Orange County
Kern County, CA 119 km (74 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

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

  1. 1.7 6km WNW of Castaic, CA
  2. 1.6 3km ESE of Fillmore, CA
  3. 2.6 12km W of Malibu, CA
  4. 1.5 11km E of Santa Clarita, CA
  5. 3.0 6km S of Ojai, CA
  6. 1.8 21km SSW of Frazier Park, CA
  7. 2.1 16km N of Santa Paula, CA
  8. 1.5 16km N of Santa Paula, CA
  9. 1.6 16km ENE of Ojai, CA
  10. 1.6 16km SW of Thousand Oaks, CA
  11. 1.6 14km NE of Ojai, CA
  12. 1.6 2km NW of Marina del Rey, CA
  13. 1.8 2km NW of Lennox, CA
  14. 1.8 2km NW of Lennox, CA
  15. 1.5 16km NW of Fillmore, 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 4.1 on 2016-03-12 — it released about 7,700 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.