QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

6km NNE of North Shore, CA

· 8.3 km deep · released about 9.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 19 kmImperial County 79 kmSan Diego County 102 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
8.3 km below the surface
Felt
no reports yet
Nearest
Riverside County, 19 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1304 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 33.5780, -115.9080. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 19 km (12 mi) SSE of here earthquakes near Riverside County
Imperial County, CA 79 km (49 mi) NW of here earthquakes near Imperial County
San Diego County, CA 102 km (63 mi) NE 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

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

  1. 2.0 8km NE of Borrego Springs, CA
  2. 1.6 13km WSW of Niland, CA
  3. 1.9 9km NNE of Ocotillo Wells, CA
  4. 1.6 13km E of Ocotillo Wells, CA
  5. 1.9 13km E of Ocotillo Wells, CA
  6. 1.8 11km NNE of Ocotillo Wells, CA
  7. 1.5 10km ENE of Ocotillo Wells, CA
  8. 1.6 5km WSW of Salton City, CA
  9. 1.5 10km WSW of Niland, CA
  10. 2.3 5km NNW of Niland, CA
  11. 1.8 10km WSW of Niland, CA
  12. 1.5 26km ENE of Thermal, CA
  13. 1.5 25km ENE of Thermal, CA
  14. 1.6 17km SW of Oasis, CA
  15. 1.6 12km ENE of Indio, 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 4.3 on 2016-09-27 — it released about 9,800 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.