off the coast of Oregon

Yes. A magnitude 4.9 earthquake was recorded off the coast of Oregon at 21:22 UTC on 2021-02-20, 10 km deep. 5 people have reported feeling it to USGS.

2021-02-20 21:22 UTC · 10 km deep · released about 340 tons of TNT

Felt it? Tell USGS Check my area

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: 2021-02-20 21:22 UTC
Magnitude: M 4.9 (mww)
Depth: 10 km below the surface
Felt: 5 reports · strongest reported intensity I
Status: Reviewed by a seismologist

USGS · last changed by USGS 326 days ago · we first saw it 326 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.

At this magnitude and depth, people at rest would likely notice it out to about 181 km (112 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 340 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.9 would have released about 32 times as much.

Northridge, California 1994 M 6.7 500× the energy of this one
Mineral, Virginia 2011 M 5.8 22× the energy of this one
Magna, Utah 2020 M 5.7 16× the energy of this one
This earthquake M 4.9 about 340 tons of TNT
Around the size people start to feel M 3.0 this one released 710× 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 6.3 on 2019-08-29 — about 130 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

Map loads when it scrolls into view

Aftershocks so far

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

4.0 off the coast of Oregon 08:31 UTC
2.8 269 km WNW of Bandon, Oregon 14:14 UTC
3.9 off the coast of Oregon 13:47 UTC
4.4 off the coast of Oregon 12:24 UTC
3.0 271 km W of Bandon, Oregon 21:18 UTC
3.0 298 km W of Bandon, Oregon 17:37 UTC
2.9 off the coast of Oregon 19:21 UTC
3.5 266 km W of Bandon, Oregon 11:21 UTC
3.5 269 km W of Bandon, Oregon 15:29 UTC
6.0 267 km W of Bandon, Oregon 20:15 UTC
3.6 off the coast of Oregon 08:13 UTC
4.3 298 km WNW of Bandon, Oregon 00:25 UTC
4.0 275 km WNW of Bandon, Oregon 15:36 UTC
3.1 off the coast of Oregon 05:09 UTC
3.1 289 km W of Bandon, Oregon 00:03 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 07:56 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.