QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

Earthquake near Topaz Ranch Estates, NV

No earthquake was likely felt in Topaz Ranch Estates in the 24 hours to 1:41 pm PST (21:41 UTC). The last one was M 2.3, 8 km (5 mi) SW, at 6:36 pm PDT on 29 September 2026, estimated intensity II (weak) in town. Every earthquake near Topaz Ranch Estates

This page: a magnitude 1.5 earthquake was recorded 37 km (23 mi) south of Topaz Ranch Estates, NV, at 4:00 am PDT on 21 October 2025 (11:00 UTC), 9.4 km deep.

USGS: 14 km SSW of Walker, California

4:00 am PDT, Oct 21, 2025 · · 9.4 km deep · released about 5.7 lb of TNT

Every earthquake near Topaz Ranch Estates Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alpine County 31 kmDouglas County 55 kmTuolumne County 56 kmLyon County 75 kmMono County 82 kmCarson City 84 kmCalaveras County 90 kmEl Dorado County 94 kmAmador County 95 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
4:00 am PDT on 21 October 2025 ()
Where
37 km (23 mi) south of Topaz Ranch Estates, NV · earthquakes near Topaz Ranch Estates
Magnitude
M 1.5 (ml)
Depth
9.4 km below the surface
Felt
no reports yet
Nearest
Alpine County, 31 km NW
Nearest mapped fault
West Walker River fault, 9 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 387 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 4 km (2 mi) from the epicentre. In Topaz Ranch Estates, 37 km away, the estimate is intensity I (not felt). 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 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 6.0 on 2021-07-08 — about 5,200,000 times the energy of this one.

Before 2016, the USGS record lists 6 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.1 4 km S of Carter Springs, Nevada · 46 km N of this epicentre
  2. 5.2 23 km S of Walker, California · 13 km SSE of this epicentre
  3. 5.1 19 km W of Bridgeport, California · 23 km SSE of this epicentre
  4. 5.1 8 km ESE of Mesa Vista, California · 43 km NNW of this epicentre
  5. 5.0 Near Coleville, California · 20 km NNE 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 38.4096, -119.5653. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Alpine County, CA 31 km (19 mi) NW earthquakes near Alpine County
Douglas County, NV 55 km (34 mi) N earthquakes near Douglas County
Tuolumne County, CA 56 km (34 mi) SW earthquakes near Tuolumne County
Lyon County, NV 75 km (47 mi) NNE earthquakes near Lyon County
Mono County, CA 82 km (51 mi) SE earthquakes near Mono County
Carson City, NV 84 km (52 mi) N earthquakes near Carson City

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

Aftershocks so far

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

  1. 1.6 7 km ENE of Coleville, California
  2. 2.3 20 km E of Markleeville, CA
  3. 1.6 4 km SW of Walker, California
  4. 1.6 13 km SE of Markleeville, CA
  5. 2.0 14 km SE of Markleeville, CA
  6. 2.0 6 km SSW of Smith Valley, Nevada
  7. 2.7 3 km W of Walker, CA
  8. 1.9 15 km SE of Markleeville, CA
  9. 1.9 14 km SE of Markleeville, CA
  10. 2.3 15 km SE of Markleeville, CA
  11. 2.3 15 km ESE of Markleeville, CA
  12. 2.0 16 km S of Bridgeport, CA
  13. 2.0 2 km SW of Walker, CA
  14. 1.8 6 km ESE of Markleeville, CA
  15. 2.2 18 km NE of Dardanelle, 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.