QuakeIndex

Earthquake · reviewed by a seismologist

M 4.1mb

266 km WSW of Crescent City, California

· 10 km deep · released about 21 tons 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 4.1 (mb)
Depth
10 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 870 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.

How big was it?

This earthquake released about 21 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 7,900× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 350× the energy of this one
  3. Magna, Utah 2020 M 5.7 250× the energy of this one
  4. This earthquake M 4.1 about 21 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 45× more

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 41.2848, -127.3357. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.8 250 km WSW of Crescent City, California
  2. 3.0 253 km W of Indianola, California
  3. 4.3 244 km W of Ferndale, California
  4. 3.4 233 km WSW of Pistol River, Oregon
  5. 2.7 245 km W of Ferndale, California
  6. 2.6 243 km W of Crescent City, California
  7. 2.6 243 km WSW of Pistol River, Oregon
  8. 3.4 258 km W of Ferndale, California
  9. 4.5 268 km W of Indianola, California
  10. 3.2 262 km W of Indianola, California
  11. 3.2 238 km WSW of Pistol River, Oregon
  12. 5.2 251 km W of Crescent City, California
  13. 4.4 260 km WSW of Crescent City, California
  14. 3.4 271 km WSW of Pistol River, Oregon
  15. 3.2 261 km W of Crescent City, 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 2016-01-30 — it released about 32 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.