QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

near the coast of Northern California

· 5.9 km deep · released about 7.8 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mendocino County 28 kmLake County 44 kmGlenn County 67 kmColusa County 79 kmSonoma County 96 kmTehama County 113 kmNapa County 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
Magnitude
M 1.6 (md)
Depth
5.9 km below the surface
Felt
no reports yet
Nearest
Mendocino County, 28 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3515 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 7.8 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 1,900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 120× the energy of this one
  4. This earthquake M 1.6 about 7.8 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 39.3743, -123.1205. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mendocino County, CA 28 km (18 mi) ESE of here earthquakes near Mendocino County
Lake County, CA 44 km (27 mi) NW of here earthquakes near Lake County
Glenn County, CA 67 km (41 mi) WSW of here earthquakes near Glenn County
Colusa County, CA 79 km (49 mi) WNW of here earthquakes near Colusa County
Sonoma County, CA 96 km (60 mi) N of here earthquakes near Sonoma County
Tehama County, CA 113 km (70 mi) SW of here earthquakes near Tehama County

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

Aftershocks so far

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

  1. 1.6 near the coast of Northern California
  2. 1.8 8 km WSW of Covelo, California
  3. 1.8 18 km NE of Upper Lake, California
  4. 2.8 19 km NNE of Upper Lake, California
  5. 1.6 2 km SSE of Lakeport, California
  6. 1.6 18 km NE of Upper Lake, California
  7. 1.6 2 km NW of Redwood Valley, California
  8. 1.6 13 km WSW of Elk Creek, California
  9. 1.6 6 km E of Redwood Valley, California
  10. 1.8 16 km NNE of Nice, California
  11. 1.8 10 km WSW of Covelo, California
  12. 2.0 18 km NE of Upper Lake, California
  13. 1.5 19 km NE of Upper Lake, California
  14. 2.3 13 km SSE of Laytonville, California
  15. 1.7 9 km N of Philo, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 5.1 on 2016-08-10 — it released about 170,000 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.