QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6ml

167 km W of Ferndale, California

· 12 km deep · released about 240 lb of TNT

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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 (ml)
Depth
12 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1984 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 240 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 63,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
  3. Around the size people start to feel M 3.0 4× the energy of this one
  4. This earthquake M 2.6 about 240 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 40.4014, -126.2316. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.7 181 km W of Ferndale, California
  2. 2.7 125 km WNW of Petrolia, CA
  3. 2.7 161 km W of Ferndale, California
  4. 2.8 200 km W of Ferndale, California
  5. 2.9 183 km W of Ferndale, California
  6. 2.7 131 km WNW of Petrolia, CA
  7. 4.0 165 km WSW of Ferndale, California
  8. 2.9 129 km WNW of Petrolia, CA
  9. 4.2 135 km WNW of Petrolia, CA
  10. 4.4 145 km WNW of Petrolia, CA
  11. 2.7 169 km W of Ferndale, California
  12. 2.9 123 km WNW of Petrolia, CA
  13. 3.9 127 km WNW of Petrolia, CA
  14. 4.3 170 km W of Ferndale, California
  15. 2.9 165 km W of Ferndale, 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 6.6 on 2016-12-08 — it released about 1,000,000 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.