Earthquake · reviewed by a seismologist
M 2.4md
Earthquake near Ferndale, CA
No earthquake was likely felt in Ferndale in the 24 hours to 2:56 am PST (10:56 UTC). The last one was M 5.0, 113 km (70 mi) W, at 8:56 pm PST on 4 November 2026, estimated intensity III (weak) in town; 145 felt reports to USGS. Every earthquake near Ferndale
This page: a magnitude 2.4 earthquake was recorded 43 km (27 mi) southwest of Ferndale, CA, at 5:27 pm PDT on 15 April 2026 (00:27 UTC), 20 km deep.
USGS: 32 km W of Petrolia, CA
- When
- 5:27 pm PDT on 15 April 2026 ()
- Where
- 43 km (27 mi) southwest of Ferndale, CA · earthquakes near Ferndale
- Magnitude
- M 2.4 (md)
- Depth
- 20 km below the surface
- Felt
- no reports yet
- Nearest
- Humboldt County, 75 km ENE
- Nearest mapped fault
- Mattole Canyon fault, 21 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 205 days ago
Earthquake alerts for Ferndale, CA
Get a notification in this browser when USGS records an earthquake near Ferndale, 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 4 km (2 mi) from the epicentre. In Ferndale, 43 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 110 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
- Magna, Utah 2020 M 5.7 95,000× the energy of this one
- Around the size people start to feel M 3.0 8.5× the energy of this one
- This earthquake M 2.4 about 110 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 7.0 on 2024-12-05 — about 8,500,000 times the energy of this one.
Before 2016, the USGS record lists 42 earthquakes of M5 or more within 50 km; the five largest:
- 7.2 The 1992 Petrolia, California Earthquake · 37 km E of this epicentre
- 6.6 32 km SW of Ferndale, California · 11 km ENE of this epicentre
- 6.5 30 km WSW of Ferndale, California · 13 km NE of this epicentre
- 6.5 The 2010 Eureka, California Earthquake · 35 km N of this epicentre
- 6.0 Near Rio Dell, California · 43 km ENE 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 40.3388, -124.6672. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Humboldt County, CA | 75 km (46 mi) | ENE | earthquakes near Humboldt County |
| Mendocino County, CA | 145 km (90 mi) | SE | earthquakes near Mendocino 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.
- 1.7 24 km WSW of Ferndale, CA
- 2.2 23 km WNW of Ferndale, CA
- 2.8 63 km W of Petrolia, CA
- 2.6 16 km W of Petrolia, CA
- 2.6 54 km W of Petrolia, CA
- 2.5 63 km W of Petrolia, CA
- 4.5 61 km W of Petrolia, CA
- 4.0 61 km W of Petrolia, CA
- 2.9 61 km W of Petrolia, CA
- 2.4 55 km W of Petrolia, CA
- 4.5 64 km W of Petrolia, CA
- 5.1 62 km W of Petrolia, CA
- 2.2 28 km W of Petrolia, CA
- 2.3 25 km W of Ferndale, CA
- 2.2 10 km W of Petrolia, 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.