QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

Earthquake near West Bishop, CA

No earthquake was likely felt in West Bishop in the 24 hours to 4:17 am PST (12:17 UTC). The last one was M 2.3, 15 km (10 mi) WNW, at 4:24 pm PDT on 24 October 2026, estimated intensity II (weak) in town. Every earthquake near West Bishop

This page: a magnitude 1.5 earthquake was recorded 20 km (13 mi) west of West Bishop, CA, at 11:26 pm PDT on 17 October 2022 (06:26 UTC), 16 km deep.

USGS: 8km WSW of Round Valley, CA

11:26 pm PDT, Oct 17, 2022 · · 16 km deep · released about 5.7 lb of TNT

10 km30 km60 km120 km N Mono County 62 kmMadera County 96 kmEsmeralda County 103 kmFresno County 110 kmMariposa County 111 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
11:26 pm PDT on 17 October 2022 ()
Where
20 km (13 mi) west of West Bishop, CA · earthquakes near West Bishop
Magnitude
M 1.5 (md)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Mono County, 62 km NNW
Nearest mapped fault
Round Valley fault, 10 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 1486 days ago

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

At this magnitude and depth it was probably too small to be felt, even directly above it. In West Bishop, 20 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.

Earthquakes near other towns within 30 km: Dixon Lane-Meadow Creek, Bishop.

How big was it?

This earthquake released about 5.7 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.7 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.

For this area

The largest earthquake within 50 km since 2016 was M 4.8 on 2016-02-16 — about 75,000 times the energy of this one.

Before 2016, the USGS record lists 38 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.4 The 1986 Chalfant Valley, California Earthquake · 28 km NE of this epicentre
  2. 6.2 9 km SW of Aspen Springs, California · 17 km NW of this epicentre
  3. 6.1 11 km WNW of Aspen Springs, California · 27 km NNW of this epicentre
  4. 6.1 8 km W of Aspen Springs, California · 22 km NNW of this epicentre
  5. 6.1 4 km NNW of Round Valley, California · 11 km NE 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 37.3798, -118.6837. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Mono County, CA 62 km (38 mi) NNW earthquakes near Mono County
Madera County, CA 96 km (60 mi) W earthquakes near Madera County
Esmeralda County, NV 103 km (64 mi) ENE earthquakes near Esmeralda County
Fresno County, CA 110 km (69 mi) SW earthquakes near Fresno County
Mariposa County, CA 111 km (69 mi) WNW earthquakes near Mariposa County
Tuolumne County, CA 133 km (83 mi) WNW earthquakes near Tuolumne 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. 2.5 13km SE of Mammoth Lakes, CA
  2. 1.6 13km SE of Mammoth Lakes, CA
  3. 1.8 14km SE of Mammoth Lakes, CA
  4. 1.8 10km WSW of Toms Place, CA
  5. 1.5 15km W of Round Valley, CA
  6. 2.3 22km WSW of Wilkerson, CA
  7. 2.6 10km WSW of Toms Place, CA
  8. 1.6 16km WSW of Toms Place, CA
  9. 1.7 6km NNE of Round Valley, CA
  10. 1.7 California-Nevada border region
  11. 1.6 3km E of Round Valley, CA
  12. 1.9 13km W of Toms Place, CA
  13. 1.6 10km SSE of Mammoth Lakes, CA
  14. 1.7 3km ENE of Bishop, CA
  15. 3.1 2km ENE of Bishop, 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.