QuakeIndex

Earthquake · reviewed by a seismologist

M 2.0md

4km NE of Lake Pillsbury, CA

· 3.6 km deep · released about 32 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 40 kmMendocino County 44 kmGlenn County 49 kmColusa County 66 kmTehama County 97 kmSonoma County 102 kmSutter County 115 kmNapa County 116 kmButte County 116 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
Magnitude
M 2.0 (md)
Depth
3.6 km below the surface
Felt
no reports yet
Nearest
Lake County, 40 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1259 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 32 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 470,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 330,000× the energy of this one
  3. Around the size people start to feel M 3.0 30× the energy of this one
  4. This earthquake M 2.0 about 32 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.

Where

Epicentre 39.4413, -122.9272. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, CA 40 km (25 mi) NNW of here earthquakes near Lake County
Mendocino County, CA 44 km (28 mi) E of here earthquakes near Mendocino County
Glenn County, CA 49 km (30 mi) WSW of here earthquakes near Glenn County
Colusa County, CA 66 km (41 mi) WNW of here earthquakes near Colusa County
Tehama County, CA 97 km (60 mi) SW of here earthquakes near Tehama County
Sonoma County, CA 102 km (63 mi) N of here earthquakes near Sonoma County

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

Aftershocks so far

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

  1. 1.6 10 km SE of Lake Pillsbury, CA
  2. 2.2 10 km N of Lake Pillsbury, CA
  3. 2.6 10 km N of Lake Pillsbury, CA
  4. 1.8 6 km ESE of Lake Pillsbury, CA
  5. 1.7 14 km N of Lake Pillsbury, CA
  6. 2.2 6 km SE of Lake Pillsbury, CA
  7. 1.6 9 km ESE of Willits, CA
  8. 1.7 14 km NNE of Redwood Valley, CA
  9. 2.1 11 km ESE of Talmage, CA
  10. 2.9 11km N of Brooktrails, CA
  11. 1.5 8km SE of Willits, CA
  12. 1.8 10km SE of Willits, CA
  13. 1.6 14km NE of Upper Lake, CA
  14. 1.6 8km E of Willits, CA
  15. 1.7 4km E of Upper Lake, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 5.1 on 2016-08-10 — it released about 40,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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