QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3ml

Earthquake near Brookings, OR

USGS: 5 km N of Brookings, Oregon

1:01 am PDT, Apr 5, 2021 · · 6.0 km deep · released about 88 lb of TNT

Every earthquake near Brookings Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Curry County 41 kmDel Norte County 47 kmJosephine County 66 km
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
1:01 am PDT on 5 April 2021 ()
Where
6 km (4 mi) N of Brookings, OR · earthquakes near Brookings
Magnitude
M 2.3 (ml)
Depth
6.0 km below the surface
Felt
no reports yet
Nearest
Curry County, 41 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2006 days ago

A magnitude 2.3 earthquake was recorded 6 km (4 mi) N of Brookings, OR, at 1:01 am PDT on 5 April 2021 (08:01 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Harbor, Fort Dick.

How big was it?

This earthquake released about 88 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 170,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 120,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 88 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.

For this area

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 5.9 5 km NNE of Hiouchi, California · 35 km SSE of this epicentre

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 42.1040, -124.2822. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Curry County, OR 41 km (25 mi) N earthquakes near Curry County
Del Norte County, CA 47 km (29 mi) SSE earthquakes near Del Norte County
Josephine County, OR 66 km (41 mi) ENE earthquakes near Josephine County

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

Aftershocks so far

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

  1. 1.6 6 km E of Pistol River, Oregon
  2. 1.8 6 km E of Pistol River, Oregon
  3. 1.6 8 km E of Pistol River, Oregon
  4. 1.7 7 km E of Pistol River, Oregon
  5. 1.8 15 km SSW of Pistol River, Oregon
  6. 1.9 7 km NE of Harbor, Oregon
  7. 3.0 6 km E of Pistol River, Oregon
  8. 1.6 6 km E of Pistol River, Oregon
  9. 1.8 13 km NNW of Brookings, Oregon
  10. 1.5 6 km SE of Gold Beach, Oregon
  11. 1.6 15 km SW of Pistol River, Oregon
  12. 1.9 6 km S of Gold Beach, Oregon
  13. 1.9 20 km W of Pistol River, Oregon
  14. 1.8 12 km SSW of Brookings, Oregon
  15. 1.9 12 km WSW of Smith River, California

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

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.