QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6md

18km W of Cape Vizcaino, CA

· 5.6 km deep · released about 260 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mendocino County 62 kmHumboldt 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 2.6 (md)
Depth
5.6 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Mendocino County, 62 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1254 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 260 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 59,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 42,000× the energy of this one
  3. Around the size people start to feel M 3.0 3.7× the energy of this one
  4. This earthquake M 2.6 about 260 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 39.7455, -124.0430. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mendocino County, CA 62 km (39 mi) NW of here earthquakes near Mendocino County
Humboldt County, CA 107 km (67 mi) S of here earthquakes near Humboldt County
Trinity County, CA 128 km (79 mi) SW of here earthquakes near Trinity County
Lake County, CA 132 km (82 mi) WNW of here earthquakes near Lake 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 9 km SSE of Redway, CA
  2. 1.6 2 km N of Redway, CA
  3. 2.3 12 km ESE of Redway, CA
  4. 2.0 12 km ESE of Redway, CA
  5. 2.3 14 km NW of Laytonville, CA
  6. 1.5 8 km NE of Shelter Cove, CA
  7. 1.8 11 km NNW of Laytonville, CA
  8. 2.1 10 km NNW of Laytonville, CA
  9. 1.8 14 km SSW of Laytonville, CA
  10. 1.6 10 km ESE of Rockport, CA
  11. 1.7 3 km NE of Redway, CA
  12. 1.6 9 km NNE of Rockport, CA
  13. 1.7 10 km ESE of Redway, CA
  14. 2.3 4 km NW of Redway, CA
  15. 1.9 15 km NW of Laytonville, 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 4.3 on 2017-12-14 — it released about 290 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.