QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

6km S of Idyllwild, CA

· 15 km deep · released about 9.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 68 kmSan Diego County 74 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 1.7 (ml)
Depth
15 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 3518 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 9.6 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 99× the energy of this one
  4. This earthquake M 1.7 about 9.6 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 33.6877, -116.7312. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 68 km (42 mi) W of here earthquakes near Riverside County
San Diego County, CA 74 km (46 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

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

  1. 2.2 17km S of Hemet, CA
  2. 1.7 8km SE of Valle Vista, CA
  3. 1.5 12km NNE of Thousand Palms, CA
  4. 2.0 12km NNE of Thousand Palms, CA
  5. 2.1 6km NNW of Banning, CA
  6. 1.5 12km N of Borrego Springs, CA
  7. 1.6 6km NE of Nuevo, CA
  8. 1.5 17km SW of La Quinta, CA
  9. 1.6 7km SSE of Idyllwild, CA
  10. 1.7 18km WNW of Morongo Valley, CA
  11. 1.7 2km NNE of Yucaipa, CA
  12. 1.7 8km NE of Aguanga, CA
  13. 2.1 4km N of Banning, CA
  14. 1.8 5km SW of Idyllwild, CA
  15. 1.6 9km NE of Aguanga, 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 190,000 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.