QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

Earthquake near Searles Valley, CA

No earthquake was likely felt in Searles Valley in the 24 hours to 10:27 am PST (18:27 UTC). The last one was M 2.7, 21 km (13 mi) N, at 11:15 am PST on 4 November 2026, estimated intensity II (weak) in town. Every earthquake near Searles Valley

This page: a magnitude 2.7 earthquake was recorded 49 km (30 mi) north-northwest of Searles Valley, CA, at 2:15 am PDT on 25 March 2021 (09:15 UTC), 2.1 km deep. 3 people have reported feeling it to USGS.

USGS: 33km ENE of Coso Junction, CA

2:15 am PDT, Mar 25, 2021 · · 2.1 km deep · released about 290 lb of TNT

Every earthquake near Searles Valley Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Inyo County 47 kmTulare County 105 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
2:15 am PDT on 25 March 2021 ()
Where
49 km (30 mi) north-northwest of Searles Valley, CA · earthquakes near Searles Valley
Magnitude
M 2.7 (ml)
Depth
2.1 km below the surface
Felt
3 reports · strongest reported intensity III
Nearest
Inyo County, 47 km NNE
Nearest mapped fault
Ash Hill fault, 20 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 1557 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 24 km (15 mi) from the epicentre. In Searles Valley, 49 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 290 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 51,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 36,000× the energy of this one
  3. Around the size people start to feel M 3.0 3.2× the energy of this one
  4. This earthquake M 2.7 about 290 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

The largest earthquake within 50 km since 2016 was M 7.1 on 2019-07-06 — about 4,600,000 times the energy of this one.

Before 2016, the USGS record lists 12 earthquakes of M5 or more within 50 km; the five largest:

  1. 5.8 16km NNE of Ridgecrest, California · 46 km S of this epicentre
  2. 5.4 17km N of Ridgecrest, California · 44 km S of this epicentre
  3. 5.3 27km E of Coso Junction, California · 11 km SSW of this epicentre
  4. 5.2 15km NNE of Inyokern, CA · 46 km SSW of this epicentre
  5. 5.2 16km N of Ridgecrest, California · 46 km S 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 36.1715, -117.6128. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Inyo County, CA 47 km (29 mi) NNE earthquakes near Inyo County
Tulare County, CA 105 km (65 mi) W earthquakes near Tulare County
Kern County, CA 136 km (85 mi) SW earthquakes near Kern County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 1.7 16km SE of Lone Pine, CA
  2. 1.6 27km N of Searles Valley, CA
  3. 1.6 13km SE of Olancha, CA
  4. 1.9 13km SE of Olancha, CA
  5. 2.3 15km W of Searles Valley, CA
  6. 1.8 5km SSE of Coso Junction, CA
  7. 2.6 36km WSW of Stovepipe Wells, CA
  8. 1.9 5km SSE of Coso Junction, CA
  9. 1.6 13km SE of Olancha, CA
  10. 2.1 16km W of Searles Valley, CA
  11. 1.6 27km E of Coso Junction, CA
  12. 1.6 19km E of Little Lake, CA
  13. 2.2 19km E of Little Lake, CA
  14. 1.5 16km W of Searles Valley, CA
  15. 1.8 16km E 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.