QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

17 km NE of Upper Lake, CA

· 5.5 km deep · released about 9.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 22 kmGlenn County 49 kmColusa County 51 kmMendocino County 56 kmSonoma County 86 kmNapa County 97 kmSutter County 100 kmYolo County 104 kmTehama County 105 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 1.7 (md)
Depth
5.5 km below the surface
Felt
no reports yet
Nearest
Lake County, 22 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 430 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 9.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 99× the energy of this one
  4. This earthquake M 1.7 about 9.6 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 39.2947, -122.8142. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, CA 22 km (13 mi) NNW of here earthquakes near Lake County
Glenn County, CA 49 km (31 mi) SW of here earthquakes near Glenn County
Colusa County, CA 51 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 86 km (54 mi) N of here earthquakes near Sonoma County
Napa County, CA 97 km (60 mi) NNW 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. 1.9 9 km ENE of Clearlake, CA
  2. 2.2 16 km WNW of Lake Pillsbury, CA
  3. 1.5 16 km WNW of Lake Pillsbury, CA
  4. 1.6 11 km N of Cloverdale, CA
  5. 1.5 7 km NE of Willits, CA
  6. 1.5 10 km NNW of Redwood Valley, CA
  7. 1.6 14 km N of Lake Pillsbury, CA
  8. 1.6 10 km NNW of Redwood Valley, CA
  9. 1.5 2 km SSW of Redwood Valley, CA
  10. 1.7 9 km ESE of Willits, CA
  11. 1.6 4 km ESE of Lower Lake, CA
  12. 1.8 4 km ESE of Lower Lake, CA
  13. 1.5 3 km E of Talmage, CA
  14. 1.5 4 km ESE of Lower Lake, CA
  15. 1.8 4 km ESE of Talmage, 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 130,000 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.