Earthquake · reviewed by a seismologist
M 2.2md
20km WNW of Boonville, CA
- When
- Magnitude
- M 2.2 (md)
- Depth
- -0.4 km below the surface
- Felt
- no reports yet
- Nearest
- Mendocino County, 39 km NNE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2948 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 69 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 5.8 220,000× the energy of this one
- Magna, Utah 2020 M 5.7 150,000× the energy of this one
- Around the size people start to feel M 3.0 14× the energy of this one
- This earthquake M 2.2 about 69 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 39.0983, -123.5610. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Mendocino County, CA | 39 km (24 mi) | SSW of here | earthquakes near Mendocino County |
| Lake County, CA | 70 km (44 mi) | W of here | earthquakes near Lake County |
| Sonoma County, CA | 84 km (52 mi) | NW of here | earthquakes near Sonoma County |
| Glenn County, CA | 114 km (71 mi) | WSW of here | earthquakes near Glenn County |
| Colusa County, CA | 114 km (71 mi) | W of here | earthquakes near Colusa County |
| Napa County, CA | 126 km (78 mi) | WNW of here | earthquakes near Napa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
56 earthquakes have been recorded within 50 km since this one.
- 2.1 15km SW of Lakeport, CA
- 1.8 10km NNW of Redwood Valley, CA
- 2.1 9km NNW of Redwood Valley, CA
- 1.7 10km NNW of Redwood Valley, CA
- 1.5 11km NNW of Redwood Valley, CA
- 2.1 4km NW of Redwood Valley, CA
- 1.7 4km NNW of Redwood Valley, CA
- 1.7 10km NNW of Redwood Valley, CA
- 1.8 14km SSE of Boonville, CA
- 2.7 9km NNW of Redwood Valley, CA
- 1.7 10km NNW of Redwood Valley, CA
- 2.1 10km NNW of Redwood Valley, CA
- 2.6 10km NNW of Redwood Valley, CA
- 2.0 10km NNW of Redwood Valley, CA
- 1.9 11km ESE of Willits, 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.
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.