List of earthquakes in Montana

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This is an incomplete list of earthquakes in the U.S state of Montana. Only earthquakes with a magnitude of 6.0 or greater are listed. Aftershocks are not included, unless they were of great significance or contributed to a death toll.

Contents

Earthquakes

DateLocation Mag. MMI DeathsInjuriesDamage / notesRef
1959-08-18 Hebgen Lake 7.2 Mw IX28+$11 million
1935-10-31 Helena 6.0 Mw VIII2Aftershock.
1935-10-18 Helena 6.2 Ms VIII2 [1]
1925-06-27 Townsend 6.9 Mw IX2$150.000 [2]
1897-11-04 Dillon 6.4 Mw  [3]
Note: The inclusion criteria for adding events are based on WikiProject Earthquakes' notability guideline that was developed for stand-alone articles. The principles described also apply to lists. In summary, only damaging, injurious, or deadly events and those of scientific interest should be recorded.

See also

Related Research Articles

<span class="mw-page-title-main">Lists of earthquakes</span>

Earthquakes are caused by movements within the Earth's crust and uppermost mantle. They range from weak events detectable only by seismometers, to sudden and violent events lasting many minutes which have caused some of the greatest disasters in human history. Below, earthquakes are listed by period, region or country, year, magnitude, cost, fatalities and number of scientific studies.

The 1959 Hebgen Lake earthquake occurred in the western United States on August 17 at 11:37 pm (MST) in southwestern Montana.

The 2020 Central Idaho earthquake occurred in the western United States on March 31, 2020, at 5:52 PM MDT, near Ruffneck Peak in the Sawtooth Mountains of central Idaho, 72 miles (116 km) northeast of Boise and 19 miles (31 km) northwest of Stanley. It had a magnitude of 6.5 and was felt with a maximum intensity of VIII.

References

  1. ↑ "M 6.3 - 2 km ENE of Helena, Montana". United States Geological Survey. October 18, 1935. Retrieved January 23, 2022.
  2. ↑ "M 6.9 – western Montana". United States Geological Survey. June 28, 1925. Retrieved January 23, 2022.
  3. ↑ "M 6.4 - Near Dillon, Montana". United States Geological Survey. November 4, 1897. Retrieved January 23, 2022.
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