Updated 2026-08-27 04:38:01 UTC

M 3.9 — 31 km NNW of Covelo, CA

Magnitude 3.9, depth 8.3 km, 2026-08-05 22:20:58 UTC.

MagnitudeM 3.9
Depth8.3 km
Felt reports8
Statusreviewed
TsunamiNo
Quake Pulse Activity Index

Activity trend

A high index means recent activity is high relative to the selected historical baseline. It does not mean that a larger earthquake is about to occur.

Quake Pulse Activity Index84/100Elevated
Current 30 days18
Historical monthly median11.0
Historical percentileP84
M5+ in 30 days6
M6+ in 30 days0
Activity trendabove the historical median (+64%)
Baseline months: 60Last calculation: 2026-09-03 06:17:39How the index works →
Quake Pulse

What to know

A short factual reading of this event from the available observations.

  • Magnitude M 3.9 at 8.3 km depth.
  • 8 felt report(s) are associated with the USGS record.
  • The available PAGER level is GREEN.
Counts describe detected earthquakes and are not a forecast or hazard assessment.
Quake Pulse

Within the Quake Pulse database

Long-term comparisons are more robust at higher magnitudes because small-earthquake detection capability has changed over time.

Magnitude rank in database#188,224
Magnitude rank in country#5,036
M4.5+ within 250 km, ±15 days0
Quake Pulse

Impact and context

Descriptive indicators available for this event and its surroundings.

8/100Limited context
Felt reports8
Max felt intensity (CDI)3.8
Instrumental intensity (MMI)3.3
PAGER alertGREEN
Tsunami indicator—
USGS significance235
Depth contextShallow
Nearby major citySan Francisco265 km · 808,000

Nearby major city

Displayed population is the indexed city population, not an estimate of people exposed.

● Quake Pulse Alerts

Follow this area

Get an e-mail when a new earthquake matches your threshold.

Create an alert →

These indicators describe data available after detection. They are neither a forecast nor a direct estimate of damage or individual risk.

Quake Pulse

Around this epicenter

Nearby events observed around this epicenter. Spatial proximity does not necessarily mean they belong to the same sequence.

M 3.9 · 31 km NNW of Covelo, CA · 100 kmInteractive 3D view of earthquakes within 100 km of M 3.9 · 31 km NNW of Covelo, CA.M 3.9 · 31 km NNW of Covelo, CAM 2.3 · 5 km NE of Willits, CA · 65.6 kmM 1.8 · 16 km SE of Petrolia, CA · 64.2 kmM 2.0 · 15 km SSE of Willow Creek, CA · 89.6 kmM 2.8 · 15 km SE of Petrolia, CA · 65.9 kmM 2.3 · 5 km ENE of Willits, CA · 68.5 kmM 2.1 · 5 km ENE of Willits, CA · 68.1 kmM 1.4 · 31 km NW of Covelo, CA · 1.7 kmM 1.4 · 15 km W of Ukiah, CA · 97.4 kmM 2.1 · 15 km W of Ukiah, CA · 97.7 kmM 1.3 · 3 km NNW of Redwood Valley, CA · 84.2 kmM 1.3 · 8 km NW of Redwood Valley, CA · 80.0 kmM 1.9 · 17 km WNW of Cape Vizcaino, CA · 55.1 kmM 1.5 · 17 km WNW of Cape Vizcaino, CA · 56.4 kmM 2.5 · 23 km W of Petrolia, CA · 98.1 kmM 1.5 · 18 km WNW of Lake Pillsbury, CA · 66.9 kmM 1.7 · 2 km ESE of Redway, CA · 32.0 kmM 1.9 · 11 km ESE of Willow Creek, CA · 98.6 kmM 1.4 · 2 km NNW of Redwood Valley, CA · 84.5 kmM 1.4 · 2 km ENE of Willits, CA · 68.4 kmM 1.7 · 3 km S of Redwood Valley, CA · 89.9 kmM 1.5 · 9 km N of Redwood Valley, CA · 78.4 kmM 1.9 · 9 km NW of Redwood Valley, CA · 79.2 kmM 1.8 · 2 km NNW of Redway, CA · 34.7 kmM 2.7 · 6 km NNW of Redwood Valley, CA · 81.0 kmM 1.9 · 12 km WSW of Petrolia, CA · 87.4 kmM 1.6 · 11 km N of Redwood Valley, CA · 75.8 kmM 1.4 · 3 km SSE of Redwood Valley, CA · 90.1 kmM 1.7 · 2 km ESE of Petrolia, CA · 77.2 kmM 2.1 · 11 km WNW of Redwood Valley, CA · 81.3 kmM 1.4 · 9 km NW of Redwood Valley, CA · 79.0 kmM 1.5 · 9 km NW of Redwood Valley, CA · 79.2 kmM 1.5 · 11 km N of Redwood Valley, CA · 76.2 kmM 1.9 · 16 km W of Cape Vizcaino, CA · 59.4 kmM 1.8 · 10 km N of Lake Pillsbury, CA · 72.1 kmM 2.6 · 10 km N of Lake Pillsbury, CA · 72.6 kmM 1.4 · 5 km NNW of Redwood Valley, CA · 82.4 kmM 1.5 · 18 km SE of Lake Pillsbury, CA · 97.3 kmM 1.9 · 16 km E of Willow Creek, CA · 99.1 kmM 1.2 · 7 km N of Brooktrails, CA · 58.2 kmM 1.0 · 8 km NW of Redwood Valley, CA · 79.8 kmM 0.8 · 15 km W of Ukiah, CA · 95.7 kmM 1.8 · 19 km W of Petrolia, CA · 94.8 kmM 1.7 · 15 km WSW of Ferndale, CA · 99.9 kmM 1.2 · 7 km E of Redwood Valley, CA · 89.5 kmM 1.2 · 16 km SE of Petrolia, CA · 63.2 kmM 1.0 · 16 km SE of Petrolia, CA · 63.5 kmM 1.7 · 29 km WSW of Hayfork, CA · 46.2 kmM 1.7 · 15 km W of Cape Vizcaino, CA · 58.7 kmM 1.1 · 22 km ESE of Rio Dell, CA · 56.3 kmM 1.7 · 8 km NW of Redwood Valley, CA · 80.1 kmM 1.3 · 11 km N of Redwood Valley, CA · 75.5 kmM 1.8 · 19 km NE of Upper Lake, CA · 99.2 kmM 1.5 · 3 km WNW of Redway, CA · 36.8 kmM 1.5 · 9 km ESE of Redwood Valley, CA · 92.8 kmM 1.3 · 8 km NNE of Redwood Valley, CA · 80.1 kmM 2.6 · 28 km NW of Weaverville, CA · 96.1 kmM 1.5 · 11 km N of Redwood Valley, CA · 75.8 kmM 1.8 · 8 km NW of Redwood Valley, CA · 80.3 kmM 1.3 · 6 km NNW of Redwood Valley, CA · 81.5 kmM 1.4 · 6 km NNW of Redwood Valley, CA · 81.4 kmM 1.2 · 6 km NNW of Redwood Valley, CA · 81.2 kmM 1.4 · 8 km NW of Redwood Valley, CA · 79.7 kmM 1.7 · 9 km ESE of Lake Pillsbury, CA · 88.1 kmM 1.2 · 10 km N of Redwood Valley, CA · 76.9 kmM 1.4 · 4 km ENE of Willits, CA · 67.1 kmM 1.6 · 8 km NW of Redwood Valley, CA · 80.3 kmM 1.3 · 2 km WNW of Redway, CA · 36.0 kmM 1.5 · 14 km WSW of Ferndale, CA · 98.1 kmM 1.7 · 12 km ESE of Willits, CA · 75.2 kmM 1.3 · 11 km N of Redwood Valley, CA · 76.2 kmM 1.4 · 8 km ESE of Redwood Valley, CA · 91.6 kmM 1.1 · 3 km SE of Redwood Valley, CA · 89.8 kmM 1.4 · 9 km ESE of Willits, CA · 74.2 kmM 1.4 · 5 km S of Redwood Valley, CA · 92.1 kmM 1.8 · 15 km WSW of Ferndale, CA · 99.4 kmM 2.6 · 5 km S of Petrolia, CA · 76.7 kmM 1.4 · 8 km NW of Redwood Valley, CA · 79.4 kmM 1.7 · 8 km NW of Redwood Valley, CA · 79.5 kmM 1.9 · 8 km NW of Redwood Valley, CA · 79.3 kmM 1.0 · 9 km NW of Redwood Valley, CA · 79.3 kmM 2.0 · 30 km E of Rio Dell, CA · 55.0 kmM 1.1 · 8 km NW of Redwood Valley, CA · 79.6 kmM 1.7 · 12 km W of Petrolia, CA · 88.9 kmM 1.9 · 10 km ENE of Rockport, CA · 36.3 kmM 1.7 · 10 km ENE of Rockport, CA · 35.8 kmM 2.7 · 32 km NNW of Covelo, CA · 1.0 kmM 1.7 · 9 km N of Redwood Valley, CA · 77.8 kmM 1.9 · 8 km N of Covelo, CA · 25.0 kmM 2.5 · 9 km E of Rancho Tehama Reserve, CA · 98.3 kmM 2.6 · 32 km NW of Covelo, CA · 1.0 kmM 1.1 · 9 km NW of Redwood Valley, CA · 79.4 kmM 1.6 · 41 km WNW of Rancho Tehama Reserve, CA · 54.8 kmM 1.2 · 1 km ESE of Redwood Valley, CA · 87.3 kmM 1.8 · 12 km N of Redwood Valley, CA · 75.3 kmM 1.7 · 16 km WNW of Petrolia, CA · 94.8 kmM 1.5 · 7 km SE of Redway, CA · 27.5 kmM 1.5 · 30 km NW of Covelo, CA · 1.0 kmM 1.1 · 30 km NW of Covelo, CA · 1.1 kmM 3.2 · 31 km NNW of Covelo, CA · 0.4 kmM 1.3 · 5 km SE of Redwood Valley, CA · 90.7 km
M 3.9 · 31 km NNW of Covelo, CA100 km100 Recent earthquakes

Descriptive map centered on the epicenter; it does not represent felt intensity or risk.

Sequence context

No public sequence is currently associated with this event.

Nearby events · 100 km

Quake Pulse

USGS data evolution

Earthquake parameters can be revised after first publication. This timeline shows versions retained by Quake Pulse.

Revisions1
Magnitude change+0.0M 3.9 → M 3.9
Depth change+0.0 km
Last update64210 min
2026-08-27 04:38:01 UTC2026-08-27 04:38:01 UTC

Explore related context

Putting this earthquake in context

An earthquake record can change after the first automatic publication as additional stations contribute data and analysts refine the solution.

Interpret the numbers

Magnitude, depth, felt reports and status describe different parts of the event. None of them alone predicts the consequences for a specific city.

Important limits

If the earthquake creates a safety concern, follow local authorities and official warning channels rather than relying on a public data website.

Read the methodology →

Blog

Latest from the blog

Guides, explainers and practical reading to go beyond the live data.

View all articles →