Earthquake near Dollar Point, CA

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 16 km (10 mi) from the epicentre. In Dollar Point, 9 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: Sunnyside-Tahoe City 12 km, intensity II · Tahoe Vista 13 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 40 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 380,000× the energy of this one
2. Magna, Utah 2020 M 5.7 270,000× the energy of this one
3. Around the size people start to feel M 3.0 24× the energy of this one
4. This earthquake M 2.1 about 40 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 4.7 on 2021-05-07 — about 7,200 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. 6.1 4 km S of Carter Springs, Nevada · 47 km SE of this epicentre Sep 12, 1994
2. 6.0 Near Reno, Nevada · 46 km NNE of this epicentre Feb 18, 1914
3. 6.0 6 km WNW of Verdi, California · 47 km N of this epicentre Dec 29, 1948
4. 5.9 9 km NW of Truckee, California · 36 km NNW of this epicentre Sep 12, 1966
5. 5.3 11 km N of Soda Springs, California · 47 km NW of this epicentre Mar 30, 1943

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 39.1253, -120.0297. Map © OpenStreetMap contributors.

Nearby places

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

Aftershocks so far

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

1. 2.4 3km NE of Dollar Point, CA 23:51 UTC
2. 2.2 4km E of Truckee, CA 18:57 UTC
3. 1.8 4km SW of Tahoe Vista, CA 05:57 UTC
4. 2.0 4 km N of Carter Springs, Nevada 17:50 UTC
5. 1.6 9 km E of Carson City, Nevada 21:01 UTC
6. 1.7 7 km ENE of Floriston, California 11:28 UTC
7. 1.6 6 km ENE of Floriston, California 23:30 UTC
8. 1.6 4 km N of Carter Springs, Nevada 03:12 UTC
9. 1.6 5 km SW of Dayton, Nevada 05:08 UTC
10. 2.1 6km N of Tahoe Vista, CA 00:04 UTC
11. 2.1 7 km ENE of Floriston, California 03:16 UTC
12. 1.5 7 km W of Mesa Vista, California 22:27 UTC
13. 1.5 7 km ENE of Floriston, California 02:24 UTC
14. 1.9 4 km N of Carter Springs, Nevada 17:40 UTC
15. 1.9 4 km N of Carter Springs, Nevada 10:48 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 19:55 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

• The official USGS event page — the source of record for every value above
• Did you feel it? Report it to USGS — reports go to USGS, not to us
• ShakeMap for this event, when USGS has produced one

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