QuakeIndex

Earthquake · automatic estimate, may change

M 2.5md

6 km NW of Macdoel, CA

· 10 km deep · released about 140 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Siskiyou County 49 kmJackson County 79 kmKlamath County 98 kmModoc County 116 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 2.5 (md)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Siskiyou County, 49 km SW
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 638 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 140 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 110,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 75,000× the energy of this one
  3. Around the size people start to feel M 3.0 6.7× the energy of this one
  4. This earthquake M 2.5 about 140 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 41.8627, -122.0650. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Siskiyou County, CA 49 km (31 mi) NE of here earthquakes near Siskiyou County
Jackson County, OR 79 km (49 mi) SE of here earthquakes near Jackson County
Klamath County, OR 98 km (61 mi) SSW of here earthquakes near Klamath County
Modoc County, CA 116 km (72 mi) WNW of here earthquakes near Modoc County

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

Aftershocks so far

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

  1. 2.0 13 km SSW of Tennant, CA
  2. 1.0 18 km WNW of Klamath Falls, Oregon
  3. 2.1 5 km SSW of Merrill, Oregon
  4. 2.0 26 km ENE of Hornbrook, CA
  5. 2.2 5 km W of Merrill, Oregon
  6. 1.9 24 km E of Tennant, CA
  7. 2.1 13 km SSE of Tennant, CA
  8. 2.0 13 km SSE of Tennant, CA
  9. 1.9 13 km SSE of Tennant, CA
  10. 1.9 16 km SSW of Tennant, CA
  11. 1.8 16 km SSW of Tennant, CA
  12. 2.6 23 km WSW of Mount Hebron, CA
  13. 1.6 23 km WSW of Klamath Falls, Oregon
  14. 2.1 4 km SW of Tennant, CA
  15. 1.6 4 km SW of Tennant, CA

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.