QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

20 km NNE of Upper Lake, California

· 8.9 km deep · released about 6.8 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 25 kmGlenn County 46 kmColusa County 52 kmMendocino County 56 kmSonoma County 90 kmSutter County 101 kmNapa County 101 kmTehama County 101 kmYolo County 107 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
8.9 km below the surface
Felt
no reports yet
Nearest
Lake County, 25 km SSE
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 6.8 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 2,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,600,000× the energy of this one
  3. Around the size people start to feel M 3.0 140× the energy of this one
  4. This earthquake M 1.6 about 6.8 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 39.3305, -122.8075. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, CA 25 km (16 mi) NNW of here earthquakes near Lake County
Glenn County, CA 46 km (29 mi) SW of here earthquakes near Glenn County
Colusa County, CA 52 km (32 mi) WNW of here earthquakes near Colusa County
Mendocino County, CA 56 km (35 mi) ESE of here earthquakes near Mendocino County
Sonoma County, CA 90 km (56 mi) N of here earthquakes near Sonoma County
Sutter County, CA 101 km (63 mi) WNW of here earthquakes near Sutter County

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

Aftershocks so far

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

  1. 1.8 16 km NNE of Nice, California
  2. 1.6 9 km SW of Kelseyville, California
  3. 1.6 2 km NW of Lower Lake, California
  4. 1.7 2 km NW of Lower Lake, California
  5. 2.0 18 km NE of Upper Lake, California
  6. 1.5 19 km NE of Upper Lake, California
  7. 1.9 27 km WSW of Paskenta, California
  8. 1.7 18 km NNE of Upper Lake, California
  9. 1.6 18 km NE of Upper Lake, California
  10. 2.0 18 km NE of Upper Lake, California
  11. 1.5 9 km ESE of Calpella, California
  12. 2.1 17 km NE of Upper Lake, California
  13. 1.7 9 km N of Redwood Valley, California
  14. 2.2 4 km E of Willits, California
  15. 2.4 28 km NNE of Potter Valley, 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 190,000 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.