Earthquake · reviewed by a seismologist
M 2.2md
14km WSW of Ferndale, CA
- When
- Magnitude
- M 2.2 (md)
- Depth
- 19 km below the surface
- Felt
- no reports yet
- Nearest
- Humboldt County, 45 km ENE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1209 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 54 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 280,000× the energy of this one
- Magna, Utah 2020 M 5.7 200,000× the energy of this one
- Around the size people start to feel M 3.0 18× the energy of this one
- This earthquake M 2.2 about 54 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 40.5187, -124.4042. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Humboldt County, CA | 45 km (28 mi) | WSW of here | earthquakes near Humboldt County |
| Trinity County, CA | 110 km (68 mi) | W of here | earthquakes near Trinity County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
59 earthquakes have been recorded within 50 km since this one.
- 2.3 6 km S of Ferndale, CA
- 2.4 7 km S of Petrolia, CA
- 2.5 16 km WSW of Petrolia, CA
- 2.4 17 km NW of Ferndale, CA
- 2.0 12 km WSW of Ferndale, CA
- 2.0 14 km WSW of Ferndale, CA
- 1.9 4km WSW of Fortuna, CA
- 2.3 23km NW of Petrolia, CA
- 1.7 32km W of Petrolia, CA
- 1.8 5km SSW of Petrolia, CA
- 1.8 7km NNE of Hydesville, CA
- 2.3 10km SW of Petrolia, CA
- 1.7 9km WSW of Petrolia, CA
- 2.3 15km WSW of Ferndale, CA
- 1.7 11km WSW 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 6.4 on 2022-12-20 — it released about 2,200,000 times the energy of this one.
From the QuakeIndex catalogue, built from the USGS FDSN event service.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.