Earthquake · reviewed by a seismologist
M 1.5md
Earthquake near Kelseyville, CA
No earthquake was likely felt in Kelseyville in the 24 hours to 12:43 am PST (08:43 UTC). The last one was M 2.6, 22 km (14 mi) SSE, at 4:44 pm PST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Kelseyville
This page: a magnitude 1.5 earthquake was recorded 10 km (6 mi) southwest of Kelseyville, CA, at 12:14 pm PDT on 27 March 2018 (19:14 UTC), 4.1 km deep.
USGS: 10km SW of Kelseyville, CA
54 km (34 mi) NNW of Santa Rosa, CA · 133 km (82 mi) NNW of San Francisco, CA
- When
- 12:14 pm PDT on 27 March 2018 ()
- Where
- 10 km (6 mi) southwest of Kelseyville, CA · earthquakes near Kelseyville
- Magnitude
- M 1.5 (md)
- Depth
- 4.1 km below the surface
- Felt
- no reports yet
- Nearest
- Lake County, 26 km NNE
- Nearest mapped fault
- Maacama fault, 9 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 3143 days ago
Earthquake alerts for Kelseyville, CA
Get a notification in this browser when USGS records an earthquake near Kelseyville, 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 Kelseyville, 10 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: Soda Bay, Cloverdale, Lakeport, Clear Lake Riviera, Cobb, North Lakeport.
How big was it?
This earthquake released about 5.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,700,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
- Around the size people start to feel M 3.0 170× the energy of this one
- This earthquake M 1.5 about 5.6 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 5.1 on 2016-08-10 — about 230,000 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 · 28 km NW 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 38.9080, -122.9075. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Lake County, CA | 26 km (16 mi) | NNE | earthquakes near Lake County |
| Sonoma County, CA | 43 km (26 mi) | S | earthquakes near Sonoma County |
| Colusa County, CA | 65 km (40 mi) | ENE | earthquakes near Colusa County |
| Napa County, CA | 67 km (42 mi) | SE | earthquakes near Napa County |
| Mendocino County, CA | 74 km (46 mi) | NW | earthquakes near Mendocino County |
| Glenn County, CA | 89 km (55 mi) | NNE | earthquakes near Glenn County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
59 earthquakes have been recorded within 50 km since this one.
- 1.5 4km N of Upper Lake, CA
- 1.6 2km S of Anderson Springs, CA
- 1.8 10km NW of The Geysers, CA
- 1.8 3km SE of The Geysers, CA
- 1.6 7km NW of The Geysers, CA
- 1.6 4km SSE of Soda Bay, CA
- 2.2 3km WSW of Anderson Springs, CA
- 1.8 7km WNW of The Geysers, CA
- 1.6 7km NW of The Geysers, CA
- 2.1 2km ESE of The Geysers, CA
- 2.4 10km E of Hidden Valley Lake, CA
- 2.0 6km WNW of The Geysers, CA
- 2.2 7km WNW of The Geysers, CA
- 1.8 10km WNW of Cobb, CA
- 1.9 9km SE of Lake Pillsbury, 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.