QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

8km NNW of Borrego Springs, CA

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

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Diego County 47 kmRiverside County 60 kmImperial County 104 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
8.4 km below the surface
Felt
38 reports · strongest reported intensity V
Nearest
San Diego County, 47 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 713 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 38 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 33.3193, -116.4203. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Diego County, CA 47 km (29 mi) NE of here earthquakes near San Diego County
Riverside County, CA 60 km (37 mi) SW of here earthquakes near Riverside County
Imperial County, CA 104 km (65 mi) WNW of here earthquakes near Imperial County

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

Aftershocks so far

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

  1. 1.8 12km SSW of Borrego Springs, CA
  2. 1.6 6km SW of Salton City, CA
  3. 1.6 8km ENE of Aguanga, CA
  4. 1.6 8km NNW of Borrego Springs, CA
  5. 1.8 19km E of Julian, CA
  6. 1.7 23km ESE of Anza, CA
  7. 1.6 6km SSE of Idyllwild, CA
  8. 1.5 9km E of Julian, CA
  9. 1.9 12km NE of Borrego Springs, CA
  10. 1.8 12km NE of Borrego Springs, CA
  11. 1.6 3km SSE of Lake Henshaw, CA
  12. 1.8 13km N of Ocotillo Wells, CA
  13. 2.4 15km E of Ocotillo Wells, CA
  14. 1.6 12km ENE of Borrego Springs, CA
  15. 1.6 7km NW of Borrego Springs, 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 5.2 on 2016-06-10 — it released about 1,200 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.