off the coast of Oregon

This was a moderate earthquake. Shaking at this size can damage poorly built structures close to the epicentre. 12 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.9 kilotons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 6.4 would have released about 32 times as much.

1. Northridge, California 1994 M 6.7 89× the energy of this one
2. Mineral, Virginia 2011 M 5.8 4× the energy of this one
3. Magna, Utah 2020 M 5.7 2.8× the energy of this one
4. This earthquake M 5.4 about 1.9 kilotons of TNT
5. Around the size people start to feel M 3.0 this one released 4,000× 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.

Where

Epicentre 43.8194, -128.0455. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 3.0 266 km WNW of Bandon, Oregon 23:13 UTC
2. 2.8 283 km W of Bandon, Oregon 23:06 UTC
3. 3.4 285 km W of Bandon, Oregon 06:29 UTC
4. 3.1 282 km W of Bandon, Oregon 06:35 UTC
5. 6.0 off the coast of Oregon 03:25 UTC
6. 4.7 273 km WNW of Bandon, Oregon 09:57 UTC
7. 3.0 276 km WNW of Bandon, Oregon 07:32 UTC
8. 4.3 off the coast of Oregon 08:38 UTC
9. 2.8 269 km WNW of Bandon, Oregon 14:14 UTC
10. 3.9 off the coast of Oregon 13:47 UTC
11. 2.7 262 km W of Bandon, Oregon 00:48 UTC
12. 4.4 off the coast of Oregon 12:24 UTC
13. 3.0 271 km W of Bandon, Oregon 21:18 UTC
14. 3.0 298 km W of Bandon, Oregon 17:37 UTC
15. 2.9 off the coast of Oregon 19:21 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 15:04 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

For this area

The largest earthquake within 50 km in our catalogue was M 6.3 on 2019-08-29 — it released about 22 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

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.