QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

4 km SSE of Ocotillo, California

· 12 km deep · released about 8.7 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Imperial County 69 kmSan Diego County 83 kmRiverside County 114 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 1.6 (ml)
Depth
12 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Imperial County, 69 km ENE
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 8.7 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 8.7 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 32.7065, -115.9737. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Imperial County, CA 69 km (43 mi) WSW of here earthquakes near Imperial County
San Diego County, CA 83 km (51 mi) ESE of here earthquakes near San Diego County
Riverside County, CA 114 km (71 mi) S of here earthquakes near Riverside 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. 3.0 26km ENE of Pine Valley, CA
  2. 1.6 6km ENE of Imperial, CA
  3. 1.5 5km S of Brawley, CA
  4. 2.0 26km WNW of Ocotillo, CA
  5. 1.5 29km SE of Campo, CA
  6. 2.0 8km SSW of Progreso, B.C., MX
  7. 1.9 4km WSW of Progreso, B.C., MX
  8. 1.6 9km S of Progreso, B.C., MX
  9. 1.5 13km W of Progreso, B.C., MX
  10. 1.7 24km E of Pine Valley, CA
  11. 2.4 24km E of Pine Valley, CA
  12. 1.8 23km ESE of Ocotillo Wells, CA
  13. 1.6 25km ESE of Julian, CA
  14. 2.0 23km NE of Pine Valley, CA
  15. 1.8 4km NE of Progreso, B.C., MX

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 4.0 on 2016-07-31 — it released about 3,800 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.