Earthquake near Fortuna, CA

No earthquake was likely felt in Fortuna in the 24 hours to 6:12 am PST (14:12 UTC). The last one was M 5.0, 123 km (76 mi) W, at 8:56 pm PST on 4 November 2026, estimated intensity II (weak) in town; 145 felt reports to USGS. Every earthquake near Fortuna

This page: a magnitude 2.6 earthquake was recorded 47 km (29 mi) west of Fortuna, CA, at 9:05 pm PDT on 6 May 2024 (04:05 UTC), 24 km deep.

USGS: 37 km W of Ferndale, CA

9:05 pm PDT, May 6, 2024 · 2024-05-07 04:05 UTC · 24 km deep · released about 270 lb of TNT

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Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.

When: 9:05 pm PDT on 6 May 2024 (2024-05-07 04:05 UTC)
Where: 47 km (29 mi) west of Fortuna, CA · earthquakes near Fortuna
Magnitude: M 2.6 (md)
Depth: 24 km below the surface
Felt: no reports yet
Nearest: Humboldt County, 68 km ENE
Status: Reviewed by a seismologist

USGS · last changed by USGS 845 days ago · we first saw it 845 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 2 km (1 mi) from the epicentre. In Fortuna, 47 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 270 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 57,000× the energy of this one
Magna, Utah 2020 M 5.7 40,000× the energy of this one
Around the size people start to feel M 3.0 3.6× the energy of this one
This earthquake M 2.6 about 270 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 6.4 on 2022-12-20 — about 450,000 times the energy of this one.

Before 2016, the USGS record lists 37 earthquakes of M5 or more within 50 km; the five largest:

7.2 The 1992 Petrolia, California Earthquake · 48 km ESE of this epicentre Apr 25, 1992
6.6 32 km SW of Ferndale, California · 25 km SSE of this epicentre Apr 26, 1992
6.5 The 1932 Eureka, California Earthquake · 40 km ENE of this epicentre Jun 6, 1932
6.5 30 km WSW of Ferndale, California · 20 km SE of this epicentre Apr 26, 1992
6.5 The 2010 Eureka, California Earthquake · 9 km N of this epicentre Jan 10, 2010

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

Map loads when it scrolls into view

Nearby places

Place	Distance	Direction from the epicentre
Humboldt County, CA	68 km (42 mi)	ENE	earthquakes near Humboldt 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.

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 14:12 UTC. 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.