QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

16 km SSW of Ferndale, California

· 27 km deep · released about 7.8 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Humboldt County 46 kmTrinity County 106 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 1.6 (md)
Depth
27 km below the surface
Felt
no reports yet
Nearest
Humboldt County, 46 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3516 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 7.8 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 120× the energy of this one
  4. This earthquake M 1.6 about 7.8 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 40.4338, -124.3368. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Humboldt County, CA 46 km (29 mi) SW of here earthquakes near Humboldt County
Trinity County, CA 106 km (66 mi) WSW of here earthquakes near Trinity County
Mendocino County, CA 135 km (84 mi) NW of here earthquakes near Mendocino County

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

Aftershocks so far

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

  1. 3.9 32 km SW of Scotia, California
  2. 1.9 14 km SW of Scotia, California
  3. 2.7 45 km SW of Ferndale, California
  4. 3.1 44 km SW of Ferndale, California
  5. 2.2 40 km SW of Ferndale, California
  6. 2.8 38 km WSW of Ferndale, California
  7. 1.9 29 km SW of Scotia, California
  8. 2.7 44 km SW of Ferndale, California
  9. 2.1 18 km ESE of Indianola, California
  10. 2.7 34 km SW of Scotia, California
  11. 2.4 40 km SW of Ferndale, California
  12. 2.4 37 km SSW of Ferndale, California
  13. 2.2 1 km NNE of Humboldt Hill, California
  14. 2.2 45 km SW of Ferndale, California
  15. 1.7 12 km WNW of Redway, 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 4.8 on 2016-07-21 — it released about 63,000 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.