QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

16km NW of Bayview, CA

· 21 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Humboldt County 38 kmDel Norte County 102 kmTrinity County 104 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 1.8 (md)
Depth
21 km below the surface
Felt
no reports yet
Nearest
Humboldt County, 38 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2229 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 14 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 790,000× the energy of this one
  3. Around the size people start to feel M 3.0 70× the energy of this one
  4. This earthquake M 1.8 about 14 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 40.8673, -124.3183. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Humboldt County, CA 38 km (23 mi) WNW of here earthquakes near Humboldt County
Del Norte County, CA 102 km (63 mi) SSW of here earthquakes near Del Norte County
Trinity County, CA 104 km (65 mi) WNW of here earthquakes near Trinity County

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

Aftershocks so far

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

  1. 2.7 1km NNE of Humboldt Hill, CA
  2. 2.8 49km W of Ferndale, CA
  3. 2.1 10km SSW of Ferndale, CA
  4. 2.8 11km NW of Eureka, CA
  5. 1.8 18km WNW of Ferndale, CA
  6. 2.6 32km WNW of Ferndale, CA
  7. 2.0 7km N of Ferndale, CA
  8. 1.6 14km SW of Ferndale, CA
  9. 2.5 10km WNW of Humboldt Hill, CA
  10. 1.8 27km SSE of Blue Lake, CA
  11. 1.6 14km SW of Ferndale, CA
  12. 2.2 8km SSE of Ferndale, CA
  13. 2.2 4km NW of Humboldt Hill, CA
  14. 2.3 1km ENE of Humboldt Hill, CA
  15. 1.8 21km NW of Petrolia, 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 36,000 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.