QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

Earthquake near China Lake Acres, CA

No earthquake was likely felt in China Lake Acres in the 24 hours to 3:37 pm PST (23:37 UTC). The last one was M 3.2, 37 km (23 mi) S, at 8:01 am PDT on 23 September 2026, estimated intensity II (weak) in town; 3 felt reports to USGS. Every earthquake near China Lake Acres

This page: a magnitude 2.2 earthquake was recorded 50 km (31 mi) north of China Lake Acres, CA, at 12:39 pm PST on 9 November 2017 (20:39 UTC), 2.1 km deep. 1 person has reported feeling it to USGS.

USGS: 9km ENE of Coso Junction, CA

12:39 pm PST, Nov 9, 2017 · · 2.1 km deep · released about 54 lb of TNT

Every earthquake near China Lake Acres Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Inyo County 67 kmTulare County 84 kmKern 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
12:39 pm PST on 9 November 2017 ()
Where
50 km (31 mi) north of China Lake Acres, CA · earthquakes near China Lake Acres
Magnitude
M 2.2 (ml)
Depth
2.1 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Inyo County, 67 km NE
Nearest mapped fault
Southern Sierra Nevada fault, 12 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3290 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth, people at rest would likely notice it out to about 18 km (11 mi) from the epicentre. In China Lake Acres, 50 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

How big was it?

This earthquake released about 54 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 280,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 200,000× the energy of this one
  3. Around the size people start to feel M 3.0 18× the energy of this one
  4. This earthquake M 2.2 about 54 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.

For this area

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record lists 18 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.3 The 1946 Walker Pass, California Earthquake · 43 km S of this epicentre
  2. 5.8 16km NNE of Ridgecrest, California · 41 km SSE of this epicentre
  3. 5.4 14km NW of Inyokern, CA · 41 km S of this epicentre
  4. 5.4 4km N of Inyokern, CA · 45 km S of this epicentre
  5. 5.4 17km N of Ridgecrest, California · 38 km SSE of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 36.0830, -117.8583. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Inyo County, CA 67 km (42 mi) NE earthquakes near Inyo County
Tulare County, CA 84 km (52 mi) WNW earthquakes near Tulare County
Kern County, CA 114 km (71 mi) SW earthquakes near Kern 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. 1.6 8km ENE of Coso Junction, CA
  2. 1.5 25km WNW of Inyokern, CA
  3. 1.6 26km E of Coso Junction, CA
  4. 1.5 34km W of Coso Junction, CA
  5. 2.5 15km NE of Little Lake, CA
  6. 1.6 12km NNE of Ridgecrest, CA
  7. 2.1 27km ENE of Coso Junction, CA
  8. 2.1 5km NE of Coso Junction, CA
  9. 2.5 11km E of Coso Junction, CA
  10. 2.4 11km SE of Olancha, CA
  11. 1.6 18km ENE of Coso Junction, CA
  12. 1.6 32km NNE of Kernville, CA
  13. 1.6 11km S of Little Lake, CA
  14. 1.9 11km S of Little Lake, CA
  15. 1.6 11km S of Little Lake, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.