QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

16 km WSW of Burnt Ranch, California

· 29 km deep · released about 200 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Humboldt County 24 kmTrinity County 47 kmDel Norte County 114 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 2.5 (md)
Depth
29 km below the surface
Felt
no reports yet
Nearest
Humboldt County, 24 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3245 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 200 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 75,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 53,000× the energy of this one
  3. Around the size people start to feel M 3.0 4.7× the energy of this one
  4. This earthquake M 2.5 about 200 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 40.7527, -123.6522. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Humboldt County, CA 24 km (15 mi) ENE of here earthquakes near Humboldt County
Trinity County, CA 47 km (29 mi) WNW of here earthquakes near Trinity County
Del Norte County, CA 114 km (71 mi) SSE of here earthquakes near Del Norte County
Siskiyou County, CA 132 km (82 mi) SW of here earthquakes near Siskiyou County
Tehama County, CA 139 km (86 mi) WNW of here earthquakes near Tehama County

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

Aftershocks so far

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

  1. 1.8 13km ESE of Hydesville, CA
  2. 2.1 6km E of Fortuna, CA
  3. 2.0 14km WNW of Willow Creek, CA
  4. 1.9 2km SW of Arcata, CA
  5. 2.3 28km W of Hayfork, CA
  6. 2.4 28km W of Hayfork, CA
  7. 1.6 29km NNE of Redway, CA
  8. 1.8 15km SE of Blue Lake, CA
  9. 1.7 2km SSE of Hydesville, CA
  10. 1.7 30km NNE of Redway, CA
  11. 2.3 6km SSE of Pine Hills, CA
  12. 2.7 14km ESE of Willow Creek, CA
  13. 2.7 5km WNW of Arcata, CA
  14. 2.0 37km NNE of Redway, CA
  15. 2.5 38km NNE of Redway, 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 4.8 on 2016-07-21 — it released about 2,500 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.