175 km W of Ferndale, California

Yes. A magnitude 5.8 earthquake was recorded 175 km W of Ferndale, California at 16:39 UTC on 2018-01-25, 8.9 km deep. 216 people have reported feeling it to USGS.

2018-01-25 16:39 UTC · 8.9 km deep · released about 7.6 kilotons 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: 2018-01-25 16:39 UTC
Magnitude: M 5.8 (mww)
Depth: 8.9 km below the surface
Felt: 216 reports · strongest reported intensity V
Measured shaking: intensity III (ShakeMap)
USGS impact alert: green
Tsunami: USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Status: Reviewed by a seismologist

USGS · last changed by USGS 1655 days ago · we first saw it 1655 days ago

This was a moderate earthquake. Shaking at this size can damage poorly built structures close to the epicentre.

At this magnitude and depth, people at rest would likely notice it out to about 310 km (193 mi) from the epicentre. 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 7.6 kilotons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 6.8 would have released about 32 times as much.

Ridgecrest, California 2019 M 7.1 89× the energy of this one
Loma Prieta, California 1989 M 6.9 45× the energy of this one
Northridge, California 1994 M 6.7 22× the energy of this one
This earthquake M 5.8 about 7.6 kilotons of TNT
Magna, Utah 2020 M 5.7 this one released 1.4× more
Around the size people start to feel M 3.0 this one released 16,000× more

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 6.6 on 2016-12-08 — about 16 times the energy of this one.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

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

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Aftershocks so far

59 earthquakes have been recorded within 50 km since this one.

3.4 201 km W of Ferndale, California 21:30 UTC
3.2 200 km W of Ferndale, California 07:49 UTC
2.8 164 km W of Ferndale, California 14:07 UTC
2.7 219 km W of Ferndale, California 02:58 UTC
2.8 157 km W of Ferndale, California 15:58 UTC
2.9 off the coast of Northern California 20:32 UTC
2.7 167 km W of Ferndale, California 18:46 UTC
3.0 165 km W of Ferndale, California 00:27 UTC
3.0 off the coast of Northern California 10:38 UTC
2.7 186 km W of Ferndale, California 03:56 UTC
2.9 210 km W of Ferndale, California 01:12 UTC
2.8 189 km W of Ferndale, California 22:10 UTC
3.1 136km W of Petrolia, CA 03:46 UTC
2.0 145 km W of Ferndale, California 07:02 UTC
4.4 216 km W of Ferndale, California 15:22 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 16:02 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.