QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

5km SSW of Idyllwild, CA

· 17 km deep · released about 18 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 68 kmSan Diego County 75 kmOrange County 97 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 1.9 (ml)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Riverside County, 68 km E
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 18 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 840,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 600,000× the energy of this one
  3. Around the size people start to feel M 3.0 53× the energy of this one
  4. This earthquake M 1.9 about 18 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 33.6978, -116.7340. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 68 km (42 mi) W of here earthquakes near Riverside County
San Diego County, CA 75 km (47 mi) N of here earthquakes near San Diego County
Orange County, CA 97 km (60 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

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

  1. 1.8 18km N of Borrego Springs, CA
  2. 1.6 6km NE of Anza, CA
  3. 3.1 4km NE of Anza, CA
  4. 2.2 5km NE of Anza, CA
  5. 2.5 10km ENE of Aguanga, CA
  6. 1.5 7km NNE of Banning, CA
  7. 1.6 19km NNW of Borrego Springs, CA
  8. 1.7 8km ESE of Yucaipa, CA
  9. 1.9 3km W of Aguanga, CA
  10. 1.6 8km NE of Aguanga, CA
  11. 1.6 5 km S of Banning, California
  12. 2.1 0 km SSW of Mountain Center, California
  13. 2.6 2 km NW of San Jacinto, California
  14. 1.7 0 km S of Mountain Center, California
  15. 2.1 0 km SSW of Mountain Center, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 5.2 on 2016-06-10 — it released about 100,000 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.