QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4ml

7km SE of Julian, CA

· 15 km deep · released about 130 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Diego County 20 kmRiverside County 94 kmImperial County 112 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 2.4 (ml)
Depth
15 km below the surface
Felt
4 reports · strongest reported intensity II
Nearest
San Diego County, 20 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3387 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 4 people have reported feeling it to USGS.

How big was it?

This earthquake released about 130 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 120,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 83,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.4× the energy of this one
  4. This earthquake M 2.4 about 130 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 33.0290, -116.5590. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Diego County, CA 20 km (13 mi) E of here earthquakes near San Diego County
Riverside County, CA 94 km (58 mi) SSW of here earthquakes near Riverside County
Imperial County, CA 112 km (70 mi) W of here earthquakes near Imperial County
Orange County, CA 134 km (83 mi) ESE of here earthquakes near Orange 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. 1.7 9km ESE of San Diego Country Estates, CA
  2. 1.6 16km N of Borrego Springs, CA
  3. 1.8 9km N of Lake Henshaw, CA
  4. 1.7 12km NNW of Ocotillo Wells, CA
  5. 1.5 14km SSE of Anza, CA
  6. 1.6 6km N of Lakeside, CA
  7. 1.7 16km SSW of Ocotillo Wells, CA
  8. 1.8 15km ESE of Julian, CA
  9. 1.6 12km NNW of Borrego Springs, CA
  10. 2.9 8km E of Ocotillo Wells, CA
  11. 2.1 17km NNW of Ocotillo Wells, CA
  12. 1.8 18km NE of Borrego Springs, CA
  13. 1.7 16km ESE of Julian, CA
  14. 1.7 18km ESE of Julian, CA
  15. 2.1 5km WNW 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.

For this area

The largest earthquake within 50 km in our catalogue was M 5.2 on 2016-06-10 — it released about 14,000 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.