236 km W of Bandon, Oregon

2016-01-30 03:42 UTC · 10 km deep · released about 120 tons of TNT

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: 2016-01-30 03:42 UTC
Magnitude: M 4.6 (mb)
Depth: 10 km below the surface
Felt: no reports yet
Status: Reviewed by a seismologist

USGS · last changed by USGS 3819 days ago · we first saw it 3819 days ago

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

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.

Northridge, California 1994 M 6.7 1,400× the energy of this one
Mineral, Virginia 2011 M 5.8 63× the energy of this one
Magna, Utah 2020 M 5.7 45× the energy of this one
This earthquake M 4.6 about 120 tons of TNT
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.

Where

Map loads when it scrolls into view

Epicentre 43.4443, -127.2908. Map © OpenStreetMap contributors.

Aftershocks so far

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

3.0 251 km WNW of Bandon, Oregon 23:32 UTC
3.1 274 km W of Bandon, Oregon 01:52 UTC
2.9 271 km W of Bandon, Oregon 19:08 UTC
5.4 227 km W of Bandon, Oregon 14:59 UTC
2.7 220 km W of Bandon, Oregon 07:08 UTC
4.1 225 km W of Bandon, Oregon 00:29 UTC
2.7 244 km W of Langlois, Oregon 01:48 UTC
4.2 201 km W of Bandon, Oregon 20:43 UTC
3.9 258 km WNW of Bandon, Oregon 08:58 UTC
3.1 263 km W of Bandon, Oregon 12:05 UTC
3.2 218 km W of Langlois, Oregon 23:33 UTC
3.7 194 km W of Bandon, Oregon 18:08 UTC
4.5 273 km WNW of Bandon, Oregon 00:21 UTC
3.1 260 km W of Bandon, Oregon 06:24 UTC
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 15:26 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.