QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

8km NE of Imperial, CA

· 9.7 km deep · released about 10 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Imperial County 21 kmRiverside County 102 kmSan Diego County 118 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
9.7 km below the surface
Felt
no reports yet
Nearest
Imperial County, 21 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3258 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 10 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 1,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 92× the energy of this one
  4. This earthquake M 1.7 about 10 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 32.9065, -115.5207. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Imperial County, CA 21 km (13 mi) SW of here earthquakes near Imperial County
Riverside County, CA 102 km (63 mi) SSE of here earthquakes near Riverside County
San Diego County, CA 118 km (73 mi) E 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

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

  1. 2.3 4km SW of Imperial, CA
  2. 1.8 8km SSE of Brawley, CA
  3. 1.7 8km SSE of Brawley, CA
  4. 1.7 8km SSE of Brawley, CA
  5. 1.9 8km SSE of Brawley, CA
  6. 1.9 9km SSE of Brawley, CA
  7. 1.7 8km SSE of Brawley, CA
  8. 1.7 4km SW of Imperial, CA
  9. 2.2 4km SW of Imperial, CA
  10. 1.5 4km SW of Imperial, CA
  11. 1.5 16km ENE of Ocotillo, CA
  12. 1.7 10km SW of Niland, CA
  13. 3.4 11km WNW of Calipatria, CA
  14. 1.5 16km E of Ocotillo Wells, CA
  15. 1.8 5km ENE of Imperial, 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 9,100 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.