13 km NNW of Shaniko, Oregon

2020-11-23 07:09 UTC · 16 km deep · released about 46 lb 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: 2020-11-23 07:09 UTC
Magnitude: M 2.1 (ml)
Depth: 16 km below the surface
Felt: no reports yet
Nearest: Wasco County, 29 km W
Status: Reviewed by a seismologist

USGS · last changed by USGS 2134 days ago · we first saw it 2134 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 46 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 330,000× the energy of this one
Magna, Utah 2020 M 5.7 230,000× the energy of this one
Around the size people start to feel M 3.0 21× the energy of this one
This earthquake M 2.1 about 46 lb of TNT

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 45.1212, -120.7968. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction
Wasco County, OR	29 km (18 mi)	E of here	earthquakes near Wasco County
Sherman County, OR	32 km (20 mi)	SSW of here	earthquakes near Sherman County
Gilliam County, OR	50 km (31 mi)	SW of here	earthquakes near Gilliam County
Jefferson County, OR	61 km (38 mi)	NNE of here	earthquakes near Jefferson County
Wheeler County, OR	74 km (46 mi)	NW of here	earthquakes near Wheeler County
Hood River County, OR	80 km (50 mi)	ESE of here	earthquakes near Hood River County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

1.7 8 km SE of Wasco, Oregon 20:53 UTC
1.9 4 km SE of Pine Grove, Oregon 01:12 UTC
1.5 5 km ESE of Dufur, Oregon 00:29 UTC
1.6 1 km E of Moro, Oregon 21:57 UTC
1.6 17 km SSW of Grass Valley, Oregon 06:44 UTC
1.5 11 km SSE of Pine Grove, Oregon 09:52 UTC
1.7 5 km ESE of Pine Grove, Oregon 20:57 UTC
1.6 11 km SSE of Maupin, Oregon 19:04 UTC
1.8 15 km NNW of Shaniko, Oregon 00:56 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 04:33 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.