Earthquake · reviewed by a seismologist
M 1.6md
Earthquake near Boonville, CA
No earthquake was likely felt in Boonville in the 24 hours to 12:19 pm PST (20:19 UTC). The last one was M 4.0, 65 km (41 mi) NNE, at 5:01 am PDT on 28 October 2026, estimated intensity II (weak) in town; 14 felt reports to USGS. Every earthquake near Boonville
This page: a magnitude 1.6 earthquake was recorded 16 km (10 mi) east-southeast of Boonville, CA, at 12:59 pm PST on 29 November 2021 (20:59 UTC), 5.9 km deep.
USGS: 16km ESE of Boonville, CA
- When
- 12:59 pm PST on 29 November 2021 ()
- Where
- 16 km (10 mi) east-southeast of Boonville, CA · earthquakes near Boonville
- Magnitude
- M 1.6 (md)
- Depth
- 5.9 km below the surface
- Felt
- no reports yet
- Nearest
- Lake County, 43 km ENE
- Nearest mapped fault
- Maacama fault, 12 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1802 days ago
Earthquake alerts for Boonville, CA
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 9 km (6 mi) from the epicentre. In Boonville, 16 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Earthquakes near other towns within 30 km: Talmage, Ukiah, Cloverdale, Lakeport, North Lakeport.
How big was it?
This earthquake released about 6.8 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.
- Mineral, Virginia 2011 M 5.8 2,200,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,600,000× the energy of this one
- Around the size people start to feel M 3.0 140× the energy of this one
- This earthquake M 1.6 about 6.8 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.
For this area
The largest earthquake within 50 km since 2016 was M 5.0 on 2016-12-14 — about 140,000 times the energy of this one.
Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:
- 5.2 6 km ESE of Talmage, California · 21 km NNE of this epicentre
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 38.9500, -123.2022. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Lake County, CA | 43 km (27 mi) | ENE | earthquakes near Lake County |
| Sonoma County, CA | 53 km (33 mi) | SSE | earthquakes near Sonoma County |
| Mendocino County, CA | 58 km (36 mi) | NNW | earthquakes near Mendocino County |
| Colusa County, CA | 87 km (54 mi) | ENE | earthquakes near Colusa County |
| Napa County, CA | 91 km (56 mi) | ESE | earthquakes near Napa County |
| Glenn County, CA | 100 km (62 mi) | NE | earthquakes near Glenn County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
58 earthquakes have been recorded within 50 km since this one.
- 2.0 10km NNW of Redwood Valley, CA
- 1.6 4km WNW of The Geysers, CA
- 1.8 9km NNW of Redwood Valley, CA
- 2.5 5km NNW of The Geysers, CA
- 1.8 6km NNW of The Geysers, CA
- 2.5 13km SE of Talmage, CA
- 1.7 1km N of The Geysers, CA
- 1.6 1km NW of The Geysers, CA
- 1.7 20km ESE of Navarro Head, CA
- 1.7 4km E of Redwood Valley, CA
- 2.1 4km E of Redwood Valley, CA
- 1.5 9km S of Boonville, CA
- 1.5 1km NNW of The Geysers, CA
- 1.8 8km NW of The Geysers, CA
- 2.2 10km 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.