QuakeIndex

Earthquake · reviewed by a seismologist

M 5.9mww

149 km W of Gold Beach, Oregon

Yes. A magnitude 5.9 earthquake was recorded 149 km W of Gold Beach, Oregon at 08:17 UTC on 2021-06-04, 14 km deep. 18 people have reported feeling it to USGS.

· 14 km deep · released about 11 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 5.9 (mww)
Depth
14 km below the surface
Felt
18 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Nearest mapped fault
Blanco transform fault, 18 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 326 days ago

This was a moderate earthquake. Shaking at this size can damage poorly built structures close to the epicentre.

At this magnitude and depth, people at rest would likely notice it out to about 328 km (204 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

How big was it?

This earthquake released about 11 kilotons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 6.9 would have released about 32 times as much.

  1. Ridgecrest, California 2019 M 7.1 63× the energy of this one
  2. Loma Prieta, California 1989 M 6.9 32× the energy of this one
  3. Northridge, California 1994 M 6.7 16× the energy of this one
  4. This earthquake M 5.9 about 11 kilotons of TNT
  5. Mineral, Virginia 2011 M 5.8 this one released 1.4× more
  6. Magna, Utah 2020 M 5.7 this one released 2× 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.

For this area

Tied for the largest within 50 km (31 mi) since 2016, with M 5.9 on 2021-06-04.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

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 42.2405, -126.2180. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 4.5 186 km WSW of Port Orford, Oregon
  2. 4.0 181 km WSW of Port Orford, Oregon
  3. 3.0 168 km WSW of Port Orford, Oregon
  4. 2.5 152 km WSW of Port Orford, Oregon
  5. 3.8 181 km WSW of Port Orford, Oregon
  6. 2.5 116 km WSW of Pistol River, Oregon
  7. 3.1 120 km WSW of Gold Beach, OR
  8. 4.0 139 km WSW of Pistol River, Oregon
  9. 2.8 146 km W of Pistol River, Oregon
  10. 3.8 177 km W of Port Orford, Oregon
  11. 2.6 185 km WSW of Pistol River, Oregon
  12. 2.7 168 km W of Gold Beach, Oregon
  13. 2.3 108 km W of Gold Beach, Oregon
  14. 3.2 125 km WSW of Pistol River, Oregon
  15. 2.6 125 km WSW of Port Orford, 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.

On USGS

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