QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

Earthquake near Alturas, CA

No earthquake was likely felt in Alturas in the 24 hours to 5:20 am PST (13:20 UTC). The last one was M 5.7, 272 km (169 mi) SSE, at 6:29 pm PDT on 13 April 2026, estimated intensity II (weak) in town; 6,515 felt reports to USGS. Every earthquake near Alturas

This page: a magnitude 2.2 earthquake was recorded 33 km (20 mi) south-southeast of Alturas, CA, at 6:52 pm PDT on 9 June 2022 (01:52 UTC), 12 km deep.

USGS: 6km ESE of Likely, CA

6:52 pm PDT, Jun 9, 2022 · · 12 km deep · released about 64 lb of TNT

Every earthquake near Alturas Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Modoc County 49 kmLassen County 56 kmWashoe County 83 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
6:52 pm PDT on 9 June 2022 ()
Where
33 km (20 mi) south-southeast of Alturas, CA · earthquakes near Alturas
Magnitude
M 2.2 (md)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Modoc County, 49 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1615 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 14 km (9 mi) from the epicentre. In Alturas, 33 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.

How big was it?

This earthquake released about 64 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 5.7 170,000× the energy of this one
  3. Around the size people start to feel M 3.0 15× the energy of this one
  4. This earthquake M 2.2 about 64 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 2 earthquakes of M5 or more within 50 km:

  1. 5.2 12 km SE of Eagleville, California · 37 km E of this epicentre
  2. 5.0 26 km S of Likely, California · 23 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 41.2022, -120.4353. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Modoc County, CA 49 km (31 mi) NNW earthquakes near Modoc County
Lassen County, CA 56 km (35 mi) SSW earthquakes near Lassen County
Washoe County, NV 83 km (52 mi) SE earthquakes near Washoe County

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

Aftershocks so far

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

  1. 3.1 39 km SSW of Likely, CA
  2. 1.6 11 km E of Eagleville, California
  3. 2.4 46 km S of Eagleville, California
  4. 1.9 23 km SSE of Eagleville, California
  5. 2.1 12 km SW of Lake City, California
  6. 1.6 14 km SE of Eagleville, California
  7. 1.6 24 km SE of Likely, California
  8. 2.6 18 km SW of Reederville, NV
  9. 2.1 13 km SE of Alturas, 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.