236 km W of Bandon, Oregon

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 149 km (93 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 120 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.6 would have released about 32 times as much.

1. Northridge, California 1994 M 6.7 1,400× the energy of this one
2. Mineral, Virginia 2011 M 5.8 63× the energy of this one
3. Magna, Utah 2020 M 5.7 45× the energy of this one
4. This earthquake M 4.6 about 120 tons of TNT
5. Around the size people start to feel M 3.0 this one released 250× 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 (31 mi) since our catalogue begins in 2016. No other earthquake of M4 or more has been recorded this close in that time.

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

Epicentre 43.4443, -127.2908. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 3.0 251 km WNW of Bandon, Oregon 23:32 UTC
2. 3.1 274 km W of Bandon, Oregon 01:52 UTC
3. 2.9 271 km W of Bandon, Oregon 19:08 UTC
4. 5.4 227 km W of Bandon, Oregon 14:59 UTC
5. 2.7 220 km W of Bandon, Oregon 07:08 UTC
6. 4.1 225 km W of Bandon, Oregon 00:29 UTC
7. 2.7 244 km W of Langlois, Oregon 01:48 UTC
8. 4.2 201 km W of Bandon, Oregon 20:43 UTC
9. 3.9 258 km WNW of Bandon, Oregon 08:58 UTC
10. 3.1 263 km W of Bandon, Oregon 12:05 UTC
11. 3.2 218 km W of Langlois, Oregon 23:33 UTC
12. 3.7 194 km W of Bandon, Oregon 18:08 UTC
13. 4.5 273 km WNW of Bandon, Oregon 00:21 UTC
14. 3.1 260 km W of Bandon, Oregon 06:24 UTC
15. 3.0 off the coast of Oregon 18:03 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 06:31 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.