QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

2km NNW of San Jacinto, CA

· 14 km deep · released about 1,500 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 76 kmSan Diego County 88 kmRiverside County 90 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 3.1 (ml)
Depth
14 km below the surface
Felt
140 reports · strongest reported intensity IV
Measured shaking
intensity V (ShakeMap)
Nearest
Orange County, 76 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2836 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 140 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,500 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 230,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 10,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,200× the energy of this one
  4. This earthquake M 3.1 about 1,500 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.6× more

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 33.7963, -116.9673. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 76 km (47 mi) E of here earthquakes near Orange County
San Diego County, CA 88 km (55 mi) NNW of here earthquakes near San Diego County
Riverside County, CA 90 km (56 mi) W of here earthquakes near Riverside County
Los Angeles County, CA 127 km (79 mi) ESE of here earthquakes near Los Angeles County
San Bernardino County, CA 138 km (86 mi) SSW of here earthquakes near San Bernardino County

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

Aftershocks so far

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

  1. 2.4 7km NE of Aguanga, CA
  2. 2.4 9km NE of Aguanga, CA
  3. 3.0 7km NE of Aguanga, CA
  4. 3.7 7km NE of Aguanga, CA
  5. 2.9 7km NE of Aguanga, CA
  6. 1.8 8km NE of Aguanga, CA
  7. 1.9 9km NE of Aguanga, CA
  8. 1.6 8km NNE of Beaumont, CA
  9. 1.9 9km NE of Aguanga, CA
  10. 2.2 9km NE of Aguanga, CA
  11. 1.8 9km NE of Aguanga, CA
  12. 1.7 8km NE of Aguanga, CA
  13. 1.5 8km NNE of Beaumont, CA
  14. 1.6 7km SE of Home Gardens, CA
  15. 2.2 8km NE of Aguanga, 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 2018-05-08 — it released about 110 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.