QuakeIndex

Earthquake · automatic estimate, may change

M 1.6md

19 km SE of Navarro Head, CA

· 0.7 km deep · released about 7.3 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mendocino County 39 kmLake County 72 kmSonoma County 85 kmGlenn County 116 kmColusa 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 1.6 (md)
Depth
0.7 km below the surface
Felt
no reports yet
Nearest
Mendocino County, 39 km NNE
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 658 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 7.3 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,500,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.3 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 39.1007, -123.5780. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mendocino County, CA 39 km (24 mi) SSW of here earthquakes near Mendocino County
Lake County, CA 72 km (45 mi) W of here earthquakes near Lake County
Sonoma County, CA 85 km (53 mi) NW of here earthquakes near Sonoma County
Glenn County, CA 116 km (72 mi) WSW of here earthquakes near Glenn County
Colusa County, CA 116 km (72 mi) W of here earthquakes near Colusa County
Napa County, CA 127 km (79 mi) WNW of here earthquakes near Napa County

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

Aftershocks so far

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

  1. 1.7 6 km E of Redwood Valley, CA
  2. 1.7 6 km ESE of Boonville, CA
  3. 1.7 12 km E of Navarro Head, CA
  4. 2.0 0 km NNW of Willits, CA
  5. 1.8 20 km ESE of Navarro Head, CA
  6. 1.9 1 km NNW of Willits, CA
  7. 2.1 1 km NNW of Willits, CA
  8. 2.7 1 km NNW of Willits, CA
  9. 3.6 1 km NNW of Willits, CA
  10. 1.5 8 km W of Redwood Valley, CA
  11. 1.8 9 km NNW of Redwood Valley, CA
  12. 1.7 12 km W of Brooktrails, CA
  13. 2.4 10 km NNW of Redwood Valley, CA
  14. 1.5 10 km SSE of Willits, CA
  15. 2.2 8 km ESE of Willits, 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 4.4 on 2020-12-06 — it released about 16,000 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.