QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6ml

8 km SSE of Altamont, Oregon

· 6.9 km deep · released about 220 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Klamath County 61 kmJackson County 86 kmSiskiyou County 93 kmModoc County 101 km
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 2.6 (ml)
Depth
6.9 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Klamath County, 61 km N
Nearest mapped fault
Klamath graben fault system, 3 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 3163 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 220 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 68,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 48,000× the energy of this one
  3. Around the size people start to feel M 3.0 4.3× the energy of this one
  4. This earthquake M 2.6 about 220 lb of TNT

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 42.1398, -121.6927. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Klamath County, OR 61 km (38 mi) S of here earthquakes near Klamath County
Jackson County, OR 86 km (54 mi) ESE of here earthquakes near Jackson County
Siskiyou County, CA 93 km (58 mi) NE of here earthquakes near Siskiyou County
Modoc County, CA 101 km (63 mi) NW of here earthquakes near Modoc County
Lake County, OR 129 km (80 mi) WSW of here earthquakes near Lake County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 1.9 10 km NNW of Klamath Falls, Oregon
  2. 2.1 5 km SSW of Merrill, Oregon
  3. 2.0 11 km NNW of Klamath Falls, Oregon
  4. 2.7 10 km E of Bonanza, Oregon
  5. 1.6 11 km NNW of Klamath Falls, Oregon
  6. 2.2 5 km W of Merrill, Oregon
  7. 1.6 23 km WSW of Klamath Falls, Oregon
  8. 1.6 25 km WNW of Klamath Falls, Oregon
  9. 1.8 16 km ESE of Dorris, California
  10. 2.5 6 km NW of Macdoel, CA
  11. 1.7 10 km NNW of Klamath Falls, Oregon
  12. 1.7 26 km WNW of Klamath Falls, Oregon
  13. 1.6 10 km WSW of Klamath Falls, Oregon
  14. 1.6 7 km WSW of Klamath Falls, Oregon
  15. 2.4 4 km E of Bonanza, 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.