QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

Earthquake near Topaz Ranch Estates, NV

No earthquake was likely felt in Topaz Ranch Estates in the 24 hours to 8:57 am PST (16:57 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 1.8 earthquake was recorded 6 km (4 mi) east-southeast of Topaz Ranch Estates, NV, at 5:51 am PDT on 23 October 2017 (12:51 UTC), 10 km deep.

USGS: 5 km ESE of Topaz Ranch Estates, Nevada

99 km (61 mi) SSE of Reno, NV · 55 km (34 mi) SSE of Carson, NV

5:51 am PDT, Oct 23, 2017 · · 10 km deep · released about 15 lb of TNT

10 km30 km60 km120 km N Douglas County 25 kmAlpine County 33 kmLyon County 40 kmCarson City 55 kmStorey County 80 kmTuolumne County 90 kmMineral County 92 kmEl Dorado County 95 kmMono County 102 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
5:51 am PDT on 23 October 2017 ()
Where
6 km (4 mi) east-southeast of Topaz Ranch Estates, NV · earthquakes near Topaz Ranch Estates
Magnitude
M 1.8 (ml)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Douglas County, 25 km NW
Nearest mapped fault
Antelope Valley fault, 6 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 3056 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 9 km (6 mi) from the epicentre. In Topaz Ranch Estates, 6 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.

Likely felt in: Topaz Ranch Estates 6 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 7 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.1 4 km S of Carter Springs, Nevada · 22 km WNW of this epicentre
  2. 5.5 California-Nevada border region · 38 km NNE of this epicentre
  3. 5.2 23 km S of Walker, California · 47 km S of this epicentre
  4. 5.1 10 km SE of South Lake Tahoe, California · 43 km WNW of this epicentre
  5. 5.1 8 km ESE of Mesa Vista, California · 24 km WNW 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 38.7180, -119.4399. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Douglas County, NV 25 km (16 mi) NW earthquakes near Douglas County
Alpine County, CA 33 km (20 mi) WSW earthquakes near Alpine County
Lyon County, NV 40 km (25 mi) NNE earthquakes near Lyon County
Carson City, NV 55 km (34 mi) NNW earthquakes near Carson City
Storey County, NV 80 km (50 mi) N earthquakes near Storey County
Tuolumne County, CA 90 km (56 mi) SSW earthquakes near Tuolumne County

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

Aftershocks so far

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

  1. 2.5 7km SSW of Markleeville, CA
  2. 1.6 1 km SW of Walker, California
  3. 1.6 6 km SE of Carter Springs, Nevada
  4. 1.8 3 km NW of Topaz, California
  5. 1.7 10 km SE of Markleeville, California
  6. 1.8 11 km SE of Markleeville, California
  7. 2.3 11km SE of Markleeville, CA
  8. 1.5 5 km WSW of Topaz Lake, Nevada
  9. 1.9 16 km NNW of Bridgeport, California
  10. 1.5 10 km WNW of Bridgeport, California
  11. 1.8 18 km S of Markleeville, California
  12. 1.9 17 km NNW of Bridgeport, California
  13. 1.6 7 km SSE of Markleeville, California
  14. 2.5 12 km NW of Bridgeport, California
  15. 1.7 16 km NNW of Bridgeport, California

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.