QuakeIndex

Earthquake · reviewed by a seismologist

M 5.2mw

5 km S of Julian, CA

· 14 km deep · released about 980 tons of TNT

10 km30 km60 km120 km N San Diego County 17 kmRiverside County 95 kmImperial County 116 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 5.2 (mw)
Depth
14 km below the surface
Felt
42638 reports · strongest reported intensity VI
Measured shaking
intensity VI (ShakeMap)
USGS impact alert
green
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Nearest
San Diego County, 17 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 93 days ago

This was a moderate earthquake. Shaking at this size can damage poorly built structures close to the epicentre. 42638 people have reported feeling it to USGS.

How big was it?

This earthquake released about 980 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 6.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 170× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 7.7× the energy of this one
  3. Magna, Utah 2020 M 5.7 5.4× the energy of this one
  4. This earthquake M 5.2 about 980 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2,100× more

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 33.0358, -116.5948. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Diego County, CA 17 km (11 mi) E of here earthquakes near San Diego County
Riverside County, CA 95 km (59 mi) SW of here earthquakes near Riverside County
Imperial County, CA 116 km (72 mi) W of here earthquakes near Imperial County
Orange County, CA 131 km (81 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

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

  1. 1.6 3 km WSW of Julian, CA
  2. 2.1 2 km SSW of Julian, CA
  3. 1.7 8 km NE of Borrego Springs, CA
  4. 2.2 3 km S of Julian, CA
  5. 2.5 2 km SW of Julian, CA
  6. 1.5 2 km WSW of Julian, CA
  7. 1.9 8 km NNE of Julian, CA
  8. 2.6 3 km SSW of Julian, CA
  9. 2.3 6 km SSE of Julian, CA
  10. 1.6 4 km S of Julian, CA
  11. 1.7 4 km SSE of Julian, CA
  12. 2.5 14 km SE of Anza, CA
  13. 1.6 2 km SW of Julian, CA
  14. 1.5 3 km SSW of Julian, CA
  15. 1.9 4 km SSE 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.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.