QuakeIndex

Earthquake · reviewed by a seismologist

M 4.5mwr

144 km WSW of Pistol River, Oregon

Yes. A magnitude 4.5 earthquake was recorded 144 km WSW of Pistol River, Oregon at 21:08 UTC on 2020-06-17, 22 km deep. 9 people have reported feeling it to USGS.

· 22 km deep · released about 85 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 4.5 (mwr)
Depth
22 km below the surface
Felt
9 reports · strongest reported intensity II
Nearest mapped fault
Blanco transform fault, 22 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 2266 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.

At this magnitude and depth, people at rest would likely notice it out to about 138 km (86 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 85 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 2,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 89× the energy of this one
  3. Magna, Utah 2020 M 5.7 63× the energy of this one
  4. This earthquake M 4.5 about 85 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 180× 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

The largest earthquake within 50 km since 2016 was M 5.2 on 2019-10-28 — about 13 times the energy of this one.

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 41.7938, -126.0193. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 3.1 149 km W of Crescent City, CA
  2. 2.9 144 km W of Pistol River, Oregon
  3. 2.7 119 km W of Pistol River, Oregon
  4. 2.9 184 km WSW of Pistol River, Oregon
  5. 2.6 155 km WSW of Pistol River, Oregon
  6. 2.3 136 km WSW of Pistol River, Oregon
  7. 5.1 169 km WSW of Pistol River, Oregon
  8. 3.1 137 km W of Pistol River, Oregon
  9. 2.0 112 km WSW of Pistol River, Oregon
  10. 2.1 118 km WSW of Crescent City, California
  11. 2.5 135 km WSW of Pistol River, Oregon
  12. 2.5 145 km WSW of Pistol River, Oregon
  13. 2.7 176 km W of Crescent City, California
  14. 2.5 116 km WSW of Pistol River, Oregon
  15. 1.9 107 km W of Crescent City, 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.