QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

11km NNE of Pine Valley, CA

· 8.5 km deep · released about 6.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Diego County 30 kmRiverside County 101 kmImperial County 106 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 1.6 (ml)
Depth
8.5 km below the surface
Felt
no reports yet
Nearest
San Diego County, 30 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2858 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 6.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.6 about 6.4 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 32.9150, -116.4828. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Diego County, CA 30 km (19 mi) ESE of here earthquakes near San Diego County
Riverside County, CA 101 km (63 mi) SSW of here earthquakes near Riverside County
Imperial County, CA 106 km (66 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

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

  1. 2.0 16km ESE of Julian, CA
  2. 1.8 8km ENE of Julian, CA
  3. 2.5 2km SE of Lake Henshaw, CA
  4. 1.6 8km NNW of Borrego Springs, CA
  5. 1.9 2km SE of Lake Henshaw, CA
  6. 1.6 2km SE of Lake Henshaw, CA
  7. 1.5 8km NNW of Borrego Springs, CA
  8. 2.4 2km SE of Lake Henshaw, CA
  9. 1.5 8km NNW of Borrego Springs, CA
  10. 1.5 8km ENE of Julian, CA
  11. 1.6 2km SE of Lake Henshaw, CA
  12. 2.1 8km NNW of Borrego Springs, CA
  13. 1.8 6km WNW of Borrego Springs, CA
  14. 2.0 2km SE of Lake Henshaw, CA
  15. 1.9 15km ESE 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.