M0.8 earthquake 19 km E of Cloverdale, California, United States

Name: M0.8 earthquake 19 km E of Cloverdale, California, United States
Start: 2026-09-28T11:19:02.950Z
End: 2026-09-28T11:19:02.950Z
Location: 19 km E of Cloverdale, California, United States

A magnitude 0.8 earthquake struck 19 km E of Cloverdale, California, United States at 04:19 local time (11:19 UTC) on 28 Sept 2026, at a depth of 2 km, according to USGS. The solution is preliminary and may be revised.

Data: USGS · updated 2026-09-28 11:20 UTC · automatic solution

Magnitude: 0.8micro
duration magnitude (md)
Depth: 2.1 km
Status: Automatic
Origin time: 2026-09-28 11:19:02 UTC; Local: 28 Sept 2026, 04:19:02 (America/Los Angeles)
Epicentre: 38.837° N, 122.799° W

Circles show this event and others within 30 km from 7 days before to 30 days after. Lines: plate boundaries and GEM active faults. Open on the live map

Nearby places

Distance and estimated shaking at nearby places
Place	Distance	Est. shaking
CloverdaleCalifornia, United States · pop. 8,811	19 km	INot felt
ClearlakeCalifornia, United States · pop. 15,182	20 km	INot felt
WindsorCalifornia, United States · pop. 27,464	32 km	INot felt
Santa RosaCalifornia, United States · pop. 178,127	45 km	INot felt
Rohnert ParkCalifornia, United States · pop. 42,407	56 km	INot felt
Agua CalienteCalifornia, United States · pop. 27,090	63 km	INot felt
SacramentoCalifornia, United States · pop. 524,943	117 km	INot felt
San FranciscoCalifornia, United States · pop. 827,526	123 km	INot felt

Shaking is an estimate from the intensity prediction equation of Allen, Wald & Worden (2012), not an observation. Local ground and buildings can change it by a level or more.

Every agency's solution

Agencies locate earthquakes with their own stations and methods, so their numbers differ. We match reports of the same event by time, distance and magnitude and show them side by side. The headline uses USGS · NC.

Agency	Magnitude	Depth	Epicentre	Time offset	Status
USGS · NCheadlineNorthern California Seismic System via U.S. Geological Survey	0.8 md	2.1 km	38.84° N, 122.80° W	–	Automatic

How big was it?

Usually not felt. Recorded by nearby seismometers; thousands occur worldwide every day.

It released roughly the energy of 239 g of TNT. Magnitude is logarithmic: each whole step means about 32 times more energy and 10 times larger waves on a seismogram. Depth matters too: at 2 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

Compare M0.8 with M1.0

M1.0 releases about 2× the energy of M0.8, and its waves are about 1.6× taller on a seismogram. Energy: 477 g of TNT vs 239 g of TNT.

Each square is the energy of one M0.8. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

16 later earthquakes within 30 km; the largest was M2.1 3 h 25 min ago. 213 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M0.8

16 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).

Did you feel it?

Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.

Reports on SeismoAtlas

No reports yet.

Event id nc75443767. First recorded here 28 Sept 2026, 17:32:07 UTC. Solutions: USGS · NC (usgs:nc75443767). Cite as: SeismoAtlas, “M0.8 earthquake 19 km E of Cloverdale, California, United States”, https://seismoatlas.com/earthquake/nc75443767-m0-8-earthquake-19-km-e-of-cloverdale-california-united-states, data from USGS.

JSON: /api/v1/events/nc75443767. SeismoAtlas is not an official warning service.

Time after mainshock (hours)	Magnitude	Depth (km)
1.21	0.8	3
2.22	0.8	3
4.49	0.7	1
5.01	0.7	2
5.01	0.7	2
5.31	1.6	3
6.63	0.8	2
6.95	1.1	2
7.30	0.5	1
7.68	0.6	2
9.03	2.1	1
9.04	0.6	1
9.05	0.8	0
9.05	0.8	0
9.12	1.4	0
9.92	0.7	3