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Light mag. 2.9 earthquake - Wyoming, 17 mi northeast of West Yellowstone, Gallatin County, Montana, USA, on Tuesday, Sep 20, 2022 at 12:42 am (GMT -6) -

Light mag. 2.9 earthquake - Wyoming, 17 mi northeast of West Yellowstone, Gallatin County, Montana, USA, on Tuesday, Sep 20, 2022 at 12:42 am (GMT -6) Light mag. 2.9 earthquake - Wyoming, 17 mi northeast of West Yellowstone, Gallatin County, Montana, USA, on Tuesday, Sep 20, 2022 at 12:42 am (GMT -6)

Light magnitude 2.9 earthquake at 8 km depth

20 Sep 06:46 UTC: First to report: EMSC after 4 minutes.
20 Sep 06:46: Now using data updates from USGS
20 Sep 07:06: Magnitude recalculated from 2.7 to 2.9. Hypocenter depth recalculated from 7.9 to 8.0 km (from 4.9 to 5 mi).
20 Sep 13:22: Epicenter location corrected by 0.7 km (0.4 mi) towards SSW.

Earthquake details

Date & timeSep 20, 2022 06:42:10 UTC -
Local time at epicenterTuesday, Sep 20, 2022 at 12:42 am (GMT -6)
Depth8.0 km
Epicenter latitude / longitude44.78017°N / 110.804°W (Park, Wyoming, United States)
Antipode44.78°S / 69.196°E
Shaking intensityNot felt
Felt0 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoYellowstone (40 km / 25 mi)
Nearby towns and cities23 km (14 mi) SSW of Mammoth (pop: 263) | Show on map | Quakes nearby
27 km (17 mi) ENE of West Yellowstone (Montana) (pop: 1,340) | Show on map | Quakes nearby
31 km (19 mi) E of Hebgen Lake Estates (Montana) (pop: 70) | Show on map | Quakes nearby
72 km (44 mi) SE of Big Sky (Montana) (pop: 2,310) | Show on map | Quakes nearby
94 km (58 mi) NNE of Ashton (Idaho) (pop: 1,050) | Show on map | Quakes nearby
100 km (62 mi) S of Livingston (Park County, Montana) (pop: 7,300) | Show on map | Quakes nearby
102 km (63 mi) S of Bozeman (Montana) (pop: 43,400) | Show on map | Quakes nearby
114 km (71 mi) NE of Saint Anthony (Idaho) (pop: 3,540) | Show on map | Quakes nearby
Weather at epicenter at time of quakeClear Sky 6.3°C (43 F), humidity: 45%, wind: 2 m/s (4 kts) from SSE
Estimated seismic energy released1.4 x 109 joules (392 kilowatt hours, equivalent to 0.338 tons of TNT) | about seismic energy
Show interactive Map
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
2.98 km23 Km SSW of Mammoth, WyomingUSGS
2.55 km22 Km SSW of Mammoth, WyomingEMSC
2.98 kmYellowstone Region, WyomingRaspberryShake


Seismic station: Flagg Ranch, Wyoming, USA (FLWY/IW network) | Distance from quake: 78 km / 48 mi | Show on map | Station Info
Seismic station Flagg Ranch, Wyoming, USA: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (1)

At magnitude 2.9, this quake might have been felt very close to the epicenter and under calm conditions.
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
West Yellowstone (36.8 km W of epicenter) [Map] / not felt

Earlier earthquakes in the same area

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