QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

4km N of Pine Valley, CA

· 13 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Diego County 30 kmRiverside County 109 kmImperial County 111 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 1.8 (ml)
Depth
13 km below the surface
Felt
no reports yet
Nearest
San Diego County, 30 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1883 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 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 32.8550, -116.5288. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Diego County, CA 30 km (18 mi) SE of here earthquakes near San Diego County
Riverside County, CA 109 km (68 mi) SSW of here earthquakes near Riverside County
Imperial County, CA 111 km (69 mi) W of here earthquakes near Imperial County
Orange County, CA 148 km (92 mi) SE of here earthquakes near Orange County

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

Aftershocks so far

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

  1. 1.9 26km SSW of Ocotillo Wells, CA
  2. 2.3 3km SE of Lake Henshaw, CA
  3. 1.7 13km SSW of Ocotillo Wells, CA
  4. 1.8 11km E of Julian, CA
  5. 1.8 27km ENE of Pine Valley, CA
  6. 2.0 7km NW of Ocotillo, CA
  7. 1.6 6km NNW of Lakeside, CA
  8. 1.9 28km SSW of Ocotillo Wells, CA
  9. 2.1 16km ESE of Julian, CA
  10. 1.6 3km ENE of Rancho San Diego, CA
  11. 1.9 4km WSW of Borrego Springs, CA
  12. 1.6 11km NE of Julian, CA
  13. 1.6 6km NNW of Lakeside, CA
  14. 1.6 24km SSW of Ocotillo Wells, CA
  15. 1.6 6km NE of Rancho San Diego, 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.