QuakeIndex

Earthquake · reviewed by a seismologist

M 4.7mww

9 km NW of Georgetown, Idaho

· 8.4 km deep · released about 170 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Caribou County 28 kmBear Lake County 30 kmFranklin County 52 kmBannock County 67 kmLincoln County 71 kmCache County 94 kmBonneville County 95 kmOneida County 98 kmRich County 104 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 4.7 (mww)
Depth
8.4 km below the surface
Felt
63 reports · strongest reported intensity IV
Measured shaking
intensity V (ShakeMap)
USGS impact alert
green
Nearest
Caribou County, 28 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3210 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 63 people have reported feeling it to USGS.

How big was it?

This earthquake released about 170 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.7 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 1,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 45× the energy of this one
  3. Magna, Utah 2020 M 5.7 32× the energy of this one
  4. This earthquake M 4.7 about 170 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 350× 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.

Where

Epicentre 42.5470, -111.4397. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Caribou County, ID 28 km (17 mi) SSE of here earthquakes near Caribou County
Bear Lake County, ID 30 km (19 mi) NNW of here earthquakes near Bear Lake County
Franklin County, ID 52 km (32 mi) NE of here earthquakes near Franklin County
Bannock County, ID 67 km (41 mi) ESE of here earthquakes near Bannock County
Lincoln County, WY 71 km (44 mi) WNW of here earthquakes near Lincoln County
Cache County, UT 94 km (58 mi) NNE of here earthquakes near Cache County

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

Aftershocks so far

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

  1. 1.7 8 km NW of Georgetown, Idaho
  2. 1.8 8 km NW of Georgetown, Idaho
  3. 1.9 14 km NNW of Georgetown, Idaho
  4. 1.7 6 km NW of Georgetown, Idaho
  5. 1.5 12 km NNW of Georgetown, Idaho
  6. 1.6 12 km NNW of Georgetown, Idaho
  7. 1.5 11 km NNW of Georgetown, Idaho
  8. 1.9 12 km NNW of Georgetown, Idaho
  9. 1.7 11 km NNW of Georgetown, Idaho
  10. 1.8 10 km NNW of Georgetown, Idaho
  11. 2.2 11 km NNW of Georgetown, Idaho
  12. 1.9 12 km E of Soda Springs, Idaho
  13. 1.6 6 km NW of Georgetown, Idaho
  14. 1.9 8 km NNW of Georgetown, Idaho
  15. 1.9 14 km ESE of Soda Springs, Idaho

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.

For this area

The largest earthquake within 50 km in our catalogue was M 5.3 on 2017-09-02 — it released about 7.9 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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