Earthquake · reviewed by a seismologist
M 2.2md
3km NW of Willow Creek, CA
- When
- Magnitude
- M 2.2 (md)
- Depth
- 23 km below the surface
- Felt
- no reports yet
- Nearest
- Humboldt County, 36 km SW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1952 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 64 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 5.8 230,000× the energy of this one
- Magna, Utah 2020 M 5.7 170,000× the energy of this one
- Around the size people start to feel M 3.0 15× the energy of this one
- This earthquake M 2.2 about 64 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 40.9598, -123.6543. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Humboldt County, CA | 36 km (23 mi) | NE of here | earthquakes near Humboldt County |
| Trinity County, CA | 57 km (36 mi) | NW of here | earthquakes near Trinity County |
| Del Norte County, CA | 92 km (57 mi) | SSE of here | earthquakes near Del Norte County |
| Siskiyou County, CA | 117 km (73 mi) | SW of here | earthquakes near Siskiyou County |
| Tehama County, CA | 152 km (94 mi) | NW of here | earthquakes near Tehama County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
48 earthquakes have been recorded within 50 km since this one.
- 2.1 22km E of Willow Creek, CA
- 2.4 22km SE of Blue Lake, CA
- 2.0 10km NNW of Willow Creek, CA
- 2.1 30km WNW of Weaverville, CA
- 2.9 30km WNW of Weaverville, CA
- 2.1 29km E of Hydesville, CA
- 2.5 30km SE of Blue Lake, CA
- 2.5 5km SSE of Weitchpec, CA
- 2.7 6km S of Weitchpec, CA
- 2.7 21km WNW of Weitchpec, CA
- 2.2 22km SSE of Willow Creek, CA
- 2.3 22km SSE of Willow Creek, CA
- 2.2 22km SSE of Willow Creek, CA
- 3.5 16km NE of Willow Creek, CA
- 3.0 19km SE of Willow Creek, 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 7,700 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.