Earthquake · reviewed by a seismologist
M 1.6md
Earthquake near Willits, CA
No earthquake was likely felt in Willits in the 24 hours to 10:57 pm PST (06:57 UTC). The last one was M 1.5, 9 km (5 mi) ESE, at 10:30 pm PST on 2 November 2026, estimated intensity II (weak) in town. Every earthquake near Willits
This page: a magnitude 1.6 earthquake was recorded 32 km (20 mi) northeast of Willits, CA, at 12:05 am PST on 11 January 2018 (08:05 UTC), 6.8 km deep.
USGS: 24km NNW of Lake Pillsbury, CA
- When
- 12:05 am PST on 11 January 2018 ()
- Where
- 32 km (20 mi) northeast of Willits, CA · earthquakes near Willits
- Magnitude
- M 1.6 (md)
- Depth
- 6.8 km below the surface
- Felt
- no reports yet
- Nearest
- Mendocino County, 36 km WSW
- Nearest mapped fault
- Bartlett Springs fault system, under 1 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 3226 days ago
Earthquake alerts for Willits, CA
Get a notification in this browser when USGS records an earthquake near Willits, CA. No account or email needed.
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 Willits, 32 km away, the estimate is intensity I (not felt). 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: Covelo.
How big was it?
This earthquake released about 8.4 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 1,800,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
- Around the size people start to feel M 3.0 110× the energy of this one
- This earthquake M 1.6 about 8.4 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 5.1 on 2016-08-10 — about 150,000 times the energy of this one.
Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.
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 39.6050, -123.0843. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Mendocino County, CA | 36 km (23 mi) | WSW | earthquakes near Mendocino County |
| Glenn County, CA | 58 km (36 mi) | E | earthquakes near Glenn County |
| Lake County, CA | 62 km (39 mi) | SSE | earthquakes near Lake County |
| Colusa County, CA | 87 km (54 mi) | ESE | earthquakes near Colusa County |
| Tehama County, CA | 93 km (58 mi) | NE | earthquakes near Tehama County |
| Trinity County, CA | 116 km (72 mi) | N | earthquakes near Trinity County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
57 earthquakes have been recorded within 50 km since this one.
- 1.8 7km ENE of Brooktrails, CA
- 1.9 9km SE of Lake Pillsbury, CA
- 2.8 16km WNW of Lake Pillsbury, CA
- 1.8 13km SSW of Lake Pillsbury, CA
- 1.6 12km S of Lake Pillsbury, CA
- 1.7 24km NW of Alder Springs, CA
- 1.6 25km NE of Covelo, CA
- 1.6 17km SE of Lake Pillsbury, CA
- 1.5 6km SSE of Laytonville, CA
- 1.6 17km NNE of Nice, CA
- 1.8 15km ESE of Lake Pillsbury, CA
- 1.9 8km ESE of Willits, CA
- 1.8 18km SE of Lake Pillsbury, CA
- 1.7 7km ESE of Redwood Valley, CA
- 2.0 7km NW of Laytonville, 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.