QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

6km NNW of Lakeside, CA

· 5.2 km deep · released about 630 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Diego County 21 kmOrange County 115 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 2.9 (ml)
Depth
5.2 km below the surface
Felt
511 reports · strongest reported intensity V
Nearest
San Diego County, 21 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2304 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 511 people have reported feeling it to USGS.

How big was it?

This earthquake released about 630 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 24,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 17,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.5× the energy of this one
  4. This earthquake M 2.9 about 630 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 32.9082, -116.9533. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Diego County, CA 21 km (13 mi) SW of here earthquakes near San Diego County
Orange County, CA 115 km (71 mi) SE of here earthquakes near Orange County
Riverside County, CA 127 km (79 mi) SW of here earthquakes near Riverside County

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

Aftershocks so far

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

  1. 1.7 2km WNW of Julian, CA
  2. 3.6 6km SSW of Warner Springs, CA
  3. 3.3 14km SW of Coronado, CA
  4. 1.7 12km NE of Julian, CA
  5. 1.7 2km SSW of San Ysidro, CA
  6. 2.8 11km ESE of Julian, CA
  7. 1.9 7km W of Palomar Observatory, CA
  8. 1.8 5km SSE of Lake Henshaw, CA
  9. 1.7 9km N of San Pasqual, CA
  10. 1.9 8km W of Encinitas, CA
  11. 1.8 7km SE of Bonita, CA
  12. 1.6 6km WNW of Lake Henshaw, CA
  13. 1.7 7km ESE of Chula Vista, CA
  14. 1.6 4km E of Julian, CA
  15. 2.0 11km NE of Julian, 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.