QuakeIndex

Earthquake · reviewed by a seismologist

M 5.2mw

130km W of Brookings, OR

· 10.0 km deep · released about 1.1 kilotons 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 5.2 (mw)
Depth
10.0 km below the surface
Felt
19 reports · strongest reported intensity IV
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 279 days ago

This was a moderate earthquake. Shaking at this size can damage poorly built structures close to the epicentre. 19 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.1 kilotons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 6.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 150× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6.9× the energy of this one
  3. Magna, Utah 2020 M 5.7 4.9× the energy of this one
  4. This earthquake M 5.2 about 1.1 kilotons of TNT
  5. Around the size people start to feel M 3.0 this one released 2,300× 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 41.8912, -125.8367. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.5 116 km WSW of Pistol River, Oregon
  2. 1.9 107 km W of Crescent City, California
  3. 3.1 120 km WSW of Gold Beach, OR
  4. 4.0 139 km WSW of Pistol River, Oregon
  5. 2.8 112 km W of Crescent City, CA
  6. 2.8 146 km W of Pistol River, Oregon
  7. 1.9 109 km WSW of Pistol River, Oregon
  8. 2.2 111km W of Crescent City, CA
  9. 2.8 154 km WSW of Pistol River, Oregon
  10. 2.3 108 km W of Gold Beach, Oregon
  11. 2.3 130 km WSW of Pistol River, Oregon
  12. 3.2 125 km WSW of Pistol River, Oregon
  13. 3.6 164 km W of Crescent City, California
  14. 1.9 144 km WSW of Pistol River, Oregon
  15. 2.8 166 km WSW of Pistol River, 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 4.9 on 2016-09-25.

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

On USGS

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