173 km WSW of Port Orford, Oregon

This was a moderate earthquake. Shaking at this size can damage poorly built structures close to the epicentre. 5 people have reported feeling it to USGS.

How big was it?

This earthquake released about 670 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 6.1 would have released about 32 times as much.

1. Northridge, California 1994 M 6.7 250× the energy of this one
2. Mineral, Virginia 2011 M 5.8 11× the energy of this one
3. Magna, Utah 2020 M 5.7 7.9× the energy of this one
4. This earthquake M 5.1 about 670 tons of TNT
5. Around the size people start to feel M 3.0 this one released 1,400× 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 42.4522, -126.5700. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 2.7 168 km WSW of Port Orford, Oregon 04:40 UTC
2. 2.9 163 km W of Port Orford, Oregon 06:04 UTC
3. 2.9 177 km WSW of Port Orford, Oregon 03:36 UTC
4. 4.1 179 km WSW of Port Orford, Oregon 20:43 UTC
5. 2.5 175 km WSW of Port Orford, Oregon 18:26 UTC
6. 2.7 137 km W of Gold Beach, Oregon 00:42 UTC
7. 2.6 186 km W of Pistol River, Oregon 17:59 UTC
8. 2.5 132 km WSW of Port Orford, Oregon 02:25 UTC
9. 3.5 156 km W of Port Orford, Oregon 01:19 UTC
10. 2.7 175 km WSW of Port Orford, Oregon 06:56 UTC
11. 2.6 160 km W of Port Orford, Oregon 16:36 UTC
12. 2.7 138 km WSW of Port Orford, Oregon 12:05 UTC
13. 3.0 146 km WSW of Port Orford, Oregon 19:02 UTC
14. 2.8 177 km WSW of Port Orford, Oregon 11:55 UTC
15. 3.0 186 km WSW of Port Orford, Oregon 13:25 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 20:20 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 5.9 on 2021-06-04 — it released about 16 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.