QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

19km ESE of Anza, CA

· 14 km deep · released about 360 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 53 kmSan Diego County 57 kmImperial County 117 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 2.7 (ml)
Depth
14 km below the surface
Felt
6 reports · strongest reported intensity II
Nearest
Riverside County, 53 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1198 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 6 people have reported feeling it to USGS.

How big was it?

This earthquake released about 360 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 42,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 30,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.6× the energy of this one
  4. This earthquake M 2.7 about 360 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 33.4797, -116.4948. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 53 km (33 mi) WSW of here earthquakes near Riverside County
San Diego County, CA 57 km (35 mi) NNE of here earthquakes near San Diego County
Imperial County, CA 117 km (72 mi) WNW of here earthquakes near Imperial County
Orange County, CA 121 km (75 mi) E 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 21km NNW of Borrego Springs, CA
  2. 1.7 0km E of Julian, CA
  3. 1.6 22km SSW of La Quinta, CA
  4. 1.9 10km NNW of Anza, CA
  5. 1.6 14km SE of Anza, CA
  6. 1.5 13km SE of Anza, CA
  7. 1.6 13km SE of Anza, CA
  8. 1.6 5km ENE of Borrego Springs, CA
  9. 1.7 11km NNE of Julian, CA
  10. 2.6 5km NW of Palomar Observatory, CA
  11. 3.4 5km NW of Palomar Observatory, CA
  12. 1.9 10km SSW of Idyllwild, CA
  13. 1.8 16km NNW of Ocotillo Wells, CA
  14. 1.6 5km WSW of Palomar Observatory, CA
  15. 1.5 22km ESE of Anza, 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 5,100 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.