Earthquake · reviewed by a seismologist
M 1.6md
Earthquake near Boonville, CA
No earthquake was likely felt in Boonville in the 24 hours to 2:20 pm PST (22:20 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 20 km (12 mi) west-northwest of Boonville, CA, at 2:11 pm PDT on 28 May 2024 (21:11 UTC), 6.0 km deep.
USGS: 20 km NW of Boonville, CA
- When
- 2:11 pm PDT on 28 May 2024 ()
- Where
- 20 km (12 mi) west-northwest of Boonville, CA · earthquakes near Boonville
- Magnitude
- M 1.6 (md)
- Depth
- 6.0 km below the surface
- Felt
- no reports yet
- Nearest
- Mendocino County, 40 km NNE
- Nearest mapped fault
- San Andreas fault, 14 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 889 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, 20 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.
How big was it?
This earthquake released about 7.6 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 2,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
- Around the size people start to feel M 3.0 130× the energy of this one
- This earthquake M 1.6 about 7.6 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 4.4 on 2020-12-06 — about 15,000 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 · 41 km E 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 39.0873, -123.5687. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Mendocino County, CA | 40 km (25 mi) | NNE | earthquakes near Mendocino County |
| Lake County, CA | 71 km (44 mi) | E | earthquakes near Lake County |
| Sonoma County, CA | 84 km (52 mi) | SE | earthquakes near Sonoma County |
| Colusa County, CA | 115 km (72 mi) | E | earthquakes near Colusa County |
| Glenn County, CA | 116 km (72 mi) | ENE | earthquakes near Glenn County |
| Napa County, CA | 126 km (78 mi) | ESE | earthquakes near Napa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
49 earthquakes have been recorded within 50 km since this one.
- 2.2 7 km ESE of Redwood Valley, CA
- 1.7 12 km WSW of Lakeport, CA
- 2.0 12 km W of Lakeport, CA
- 1.6 7 km E of Willits, CA
- 1.6 19 km SE of Navarro Head, CA
- 1.5 15 km ESE of Boonville, CA
- 1.6 15 km ESE of Navarro Head, CA
- 2.5 2 km NNE of Point Arena, CA
- 1.8 21 km SW of Willits, CA
- 1.7 5 km SE of Willits, CA
- 1.6 7 km S of Talmage, CA
- 2.1 19 km SSE of Boonville, CA
- 1.6 5 km WSW of Redwood Valley, CA
- 2.1 5 km SW of Boonville, CA
- 2.3 12 km ENE of Navarro Head, 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.