QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

11km WNW of Morongo Valley, CA

· 11 km deep · released about 19 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 75 kmSan Bernardino County 99 kmOrange County 109 kmSan Diego 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 1.9 (ml)
Depth
11 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Riverside County, 75 km ESE
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. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 19 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 5.8 790,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 560,000× the energy of this one
  3. Around the size people start to feel M 3.0 50× the energy of this one
  4. This earthquake M 1.9 about 19 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 34.0743, -116.7000. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 75 km (47 mi) WNW of here earthquakes near Riverside County
San Bernardino County, CA 99 km (62 mi) SSW of here earthquakes near San Bernardino County
Orange County, CA 109 km (68 mi) ENE of here earthquakes near Orange County
San Diego County, CA 117 km (73 mi) N of here earthquakes near San Diego County

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

Aftershocks so far

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

  1. 1.7 16km ENE of Thousand Palms, CA
  2. 1.8 6km ESE of Valle Vista, CA
  3. 1.9 8km ESE of Yucaipa, CA
  4. 1.9 5km SSW of Idyllwild, CA
  5. 1.9 10km NNW of Big Bear City, CA
  6. 2.1 2km SE of Big Bear City, CA
  7. 2.5 2km SE of Loma Linda, CA
  8. 3.1 2km SSE of Big Bear City, CA
  9. 2.0 5km SE of Loma Linda, CA
  10. 1.5 7km S of Idyllwild, CA
  11. 1.5 19km N of Cabazon, CA
  12. 1.6 6km SW of Idyllwild, CA
  13. 2.0 5km SW of Idyllwild, CA
  14. 3.1 2km ESE of Loma Linda, CA
  15. 1.8 9km NNW of Big Bear Lake, 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 4.4 on 2016-01-06 — it released about 6,000 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.