QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

12km E of Redwood Valley, CA

· 7.2 km deep · released about 6.2 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 32 kmMendocino County 38 kmGlenn County 70 kmColusa County 72 kmSonoma County 82 kmNapa County 105 kmYolo County 119 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 1.5 (md)
Depth
7.2 km below the surface
Felt
no reports yet
Nearest
Lake County, 32 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1707 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 6.2 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.5 about 6.2 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 39.2512, -123.0722. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, CA 32 km (20 mi) WNW of here earthquakes near Lake County
Mendocino County, CA 38 km (23 mi) ESE of here earthquakes near Mendocino County
Glenn County, CA 70 km (43 mi) SW of here earthquakes near Glenn County
Colusa County, CA 72 km (45 mi) W of here earthquakes near Colusa County
Sonoma County, CA 82 km (51 mi) N of here earthquakes near Sonoma County
Napa County, CA 105 km (65 mi) NW of here earthquakes near Napa County

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

Aftershocks so far

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

  1. 2.0 7km NNW of Redwood Valley, CA
  2. 1.8 20km ENE of Navarro Head, CA
  3. 1.7 8km WNW of Upper Lake, CA
  4. 1.7 5km E of Lake Pillsbury, CA
  5. 1.8 1km ESE of Lake Pillsbury, CA
  6. 1.9 18km SW of Willits, CA
  7. 1.9 3km ENE of North Lakeport, CA
  8. 1.8 14km NE of Willits, CA
  9. 1.5 10km NW of The Geysers, CA
  10. 1.9 20km NE of Brooktrails, CA
  11. 1.7 6km E of Willits, CA
  12. 1.7 17km SE of Lake Pillsbury, CA
  13. 2.3 9km WNW of Cobb, CA
  14. 1.9 2km W of Redwood Valley, CA
  15. 1.6 7km ESE of Redwood Valley, 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 210,000 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.