QuakeIndex

Earthquake · reviewed by a seismologist

M 4.6mww

234 km W of Bandon, Oregon

· 10 km deep · released about 120 tons of TNT

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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
Magnitude
M 4.6 (mww)
Depth
10 km below the surface
Felt
2 reports · strongest reported intensity II
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 362 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 2 people have reported feeling it to USGS.

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.

  1. Northridge, California 1994 M 6.7 1,400× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 63× the energy of this one
  3. Magna, Utah 2020 M 5.7 45× the energy of this one
  4. This earthquake M 4.6 about 120 tons of TNT
  5. 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

Epicentre 43.4651, -127.2580. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.6 197 km W of Bandon, Oregon
  2. 3.1 274 km W of Bandon, Oregon
  3. 2.8 195 km W of Bandon, Oregon
  4. 2.9 258 km WNW of Bandon, Oregon
  5. 3.0 266 km WNW of Bandon, Oregon
  6. 2.9 189 km W of Bandon, Oregon
  7. 3.9 249 km W of Bandon, Oregon
  8. 3.2 232 km W of Bandon, Oregon
  9. 3.0 276 km WNW of Bandon, Oregon
  10. 3.9 196 km W of Bandon, Oregon
  11. 3.2 191 km W of Bandon, Oregon
  12. 3.2 231 km WNW of Bandon, Oregon
  13. 3.1 262 km W of Bandon, Oregon
  14. 3.2 211 km W of Bandon, Oregon
  15. 3.2 232 km W of Bandon, Oregon

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.

For this area

The largest earthquake within 50 km in our catalogue was M 6.2 on 2018-08-22 — it released about 250 times the energy of this one.

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

On USGS

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