QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

3km S of Hemet, CA

· 17 km deep · released about 9.3 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 74 kmSan Diego County 80 kmRiverside County 90 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 1.7 (ml)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Orange County, 74 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1477 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 9.3 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 100× the energy of this one
  4. This earthquake M 1.7 about 9.3 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 33.7242, -116.9762. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 74 km (46 mi) E of here earthquakes near Orange County
San Diego County, CA 80 km (50 mi) NNW of here earthquakes near San Diego County
Riverside County, CA 90 km (56 mi) W of here earthquakes near Riverside County
Los Angeles County, CA 130 km (81 mi) ESE of here earthquakes near Los Angeles County

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

Aftershocks so far

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

  1. 2.3 11km NW of Anza, CA
  2. 1.5 4km NNW of Anza, CA
  3. 2.2 6km NE of Cabazon, CA
  4. 2.7 5km E of Calimesa, CA
  5. 2.5 2km NE of Cabazon, CA
  6. 1.6 1km ESE of Loma Linda, CA
  7. 1.8 2km NW of Cabazon, CA
  8. 1.8 15km NNW of Aguanga, CA
  9. 1.6 9km N of Cabazon, CA
  10. 2.2 8km SE of Valle Vista, CA
  11. 1.9 2km ESE of Colton, CA
  12. 1.5 7km SSE of Home Gardens, CA
  13. 2.6 2km WNW of Aguanga, CA
  14. 1.7 9km NNE of Nuevo, CA
  15. 2.2 9km S of Idyllwild, 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 4.5 on 2018-05-08 — it released about 18,000 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.