QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

Earthquake near East Quincy, CA

No earthquake was likely felt in East Quincy in the 24 hours to 7:51 am PST (15:51 UTC). The last one was M 2.3, 6 km (3 mi) N, at 5:11 am PST on 7 November 2026, estimated intensity II (weak) in town. Every earthquake near East Quincy

This page: a magnitude 2.2 earthquake was recorded 14 km (9 mi) southeast of East Quincy, CA, at 12:50 am PDT on 5 November 2023 (07:50 UTC), less than 1 km deep. 2 people have reported feeling it to USGS.

USGS: 8 km S of Spring Garden, CA

87 km (54 mi) WNW of Reno, NV

12:50 am PDT, Nov 5, 2023 · · -1.0 km deep · released about 67 lb of TNT

Every earthquake near East Quincy Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Plumas County 18 kmSierra County 37 kmNevada County 60 kmButte County 72 kmYuba County 79 kmPlacer County 86 kmLassen County 99 kmStorey County 117 kmCarson City 118 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
12:50 am PDT on 5 November 2023 ()
Where
14 km (9 mi) southeast of East Quincy, CA · earthquakes near East Quincy
Magnitude
M 2.2 (md)
Depth
-1.0 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Plumas County, 18 km N
Nearest mapped fault
Mohawk Valley 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 1102 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 19 km (12 mi) from the epicentre. In East Quincy, 14 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: East Quincy 14 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 67 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 230,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 160,000× the energy of this one
  3. Around the size people start to feel M 3.0 14× the energy of this one
  4. This earthquake M 2.2 about 67 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 5.5 on 2023-05-11 — about 75,000 times the energy of this one.

Before 2016, the USGS record lists 4 earthquakes of M5 or more within 50 km:

  1. 5.9 West of Downieville, California · 41 km SSW of this epicentre
  2. 5.7 2 km NNE of Canyondam, California · 46 km NNW of this epicentre
  3. 5.2 3 km N of Blairsden, California · 15 km E of this epicentre
  4. 5.0 Nevada County, California · 49 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 39.8358, -120.7927. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Plumas County, CA 18 km (11 mi) N earthquakes near Plumas County
Sierra County, CA 37 km (23 mi) SE earthquakes near Sierra County
Nevada County, CA 60 km (37 mi) S earthquakes near Nevada County
Butte County, CA 72 km (45 mi) WSW earthquakes near Butte County
Yuba County, CA 79 km (49 mi) SW earthquakes near Yuba County
Placer County, CA 86 km (54 mi) S earthquakes near Placer County

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

Aftershocks so far

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

  1. 2.6 6 km NW of Belden, CA
  2. 2.3 6 km WNW of Belden, CA
  3. 2.5 5 km NW of Belden, CA
  4. 2.3 5 km NW of Belden, CA
  5. 2.2 5 km NW of Belden, CA
  6. 2.9 6 km NW of Belden, CA
  7. 2.6 5 km NW of Belden, CA
  8. 2.2 5 km NW of Belden, CA
  9. 2.7 5 km NW of Belden, CA
  10. 2.2 5 km NW of Belden, CA
  11. 4.4 6 km NW of Belden, CA
  12. 4.1 6 km WNW of Belden, CA
  13. 2.0 3 km ENE of Canyondam, CA
  14. 2.2 2 km NNW of Canyondam, CA
  15. 2.2 4 km SSE of Canyondam, 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.