QuakeIndex

Earthquake · reviewed by a seismologist

M 4.9mww

207 km WSW of Pistol River, Oregon

Yes. A magnitude 4.9 earthquake was recorded 207 km WSW of Pistol River, Oregon at 12:16 UTC on 2018-07-24, 10 km deep. 1 person has reported feeling it to USGS.

· 10 km deep · released about 340 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 4.9 (mww)
Depth
10 km below the surface
Felt
1 report · strongest reported intensity I
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 2957 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 181 km (112 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 340 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.9 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 500× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 22× the energy of this one
  3. Magna, Utah 2020 M 5.7 16× the energy of this one
  4. This earthquake M 4.9 about 340 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 710× 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 (31 mi) since our catalogue begins in 2016. The previous largest was M 4.3 on 2016-12-06.

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 41.7122, -126.7798. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.6 186 km W of Pistol River, Oregon
  2. 2.9 231 km WSW of Pistol River, Oregon
  3. 2.7 199 km W of Pistol River, Oregon
  4. 3.4 233 km WSW of Pistol River, Oregon
  5. 3.1 204 km WSW of Pistol River, Oregon
  6. 2.9 189 km WSW of Pistol River, Oregon
  7. 3.2 210 km WSW of Pistol River, Oregon
  8. 2.6 243 km W of Crescent City, California
  9. 2.6 243 km WSW of Pistol River, Oregon
  10. 2.9 198 km WSW of Pistol River, Oregon
  11. 2.9 184 km WSW of Pistol River, Oregon
  12. 4.3 194 km W of Pistol River, Oregon
  13. 4.5 209 km WSW of Pistol River, Oregon
  14. 5.1 169 km WSW of Pistol River, Oregon
  15. 2.2 185 km W of Gold Beach, 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.