QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

17km NNE of Pine Valley, CA

· 11 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Diego County 33 kmRiverside County 95 kmImperial County 101 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
11 km below the surface
Felt
no reports yet
Nearest
San Diego County, 33 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3421 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 32.9508, -116.4295. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Diego County, CA 33 km (21 mi) ESE of here earthquakes near San Diego County
Riverside County, CA 95 km (59 mi) SSW of here earthquakes near Riverside County
Imperial County, CA 101 km (63 mi) W of here earthquakes near Imperial County

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

Aftershocks so far

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

  1. 2.4 7km SE of Julian, CA
  2. 3.2 27km WSW of Westmorland, CA
  3. 1.7 6km NNE of Borrego Springs, CA
  4. 2.0 11km NE of Ocotillo Wells, CA
  5. 2.0 14 km NE of Borrego Springs, California
  6. 1.5 18 km S of Salton City, California
  7. 2.9 22 km SSW of Salton City, California
  8. 2.0 7 km S of Borrego Springs, California
  9. 1.8 22 km NNE of Ramona, California
  10. 1.9 15 km ENE of Mt Laguna, California
  11. 1.5 7 km NNW of Borrego Springs, California
  12. 1.7 14 km SSW of Salton City, California
  13. 1.9 10 km S of Mt Laguna, California
  14. 2.1 8 km NNW of Borrego Springs, California
  15. 1.6 12 km SSW of Salton City, California

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.