1925 Montana earthquake
  Helena Bozeman  | |
| UTC time | 1925-06-28 01:21:12 |
|---|---|
| ISC event | 910562 |
| USGS-ANSS | ComCat |
| Local date | 27 June 1925 |
| Local time | 17:21:12 |
| Magnitude | 6.9 Ms[1] |
| Depth | 15 km (9 mi) |
| Epicenter | 46°22′N 111°25′W / 46.37°N 111.41°W |
| Areas affected | Montana, United States |
| Total damage | $150 thousand |
| Max. intensity | MMI IX (Violent) |
| Foreshocks | 1 possible, magnitude unknown |
| Aftershocks | 75+ |
| Casualties | 2 injured |
The 1925 Montana (Clarkston Valley) earthquake occurred at 17:21:12
Tectonic setting
The epicenter area,
Earthquake
The earthquake struck at evening in
Impact
A school in Manhattan was damaged beyond repair as well as other schools in Willow Creek, Bozeman and Radersburg being seriously damaged, along with many brick, stone and cement buildings including a church at Three Forks, Logan and a court house in White Sulphur Springs.[2] Many buildings were damaged, pavements were cracked, windows were broken and chimneys toppled as a result of the earthquake.[4] The shaking triggered landslides along the Missouri River which blocked railroad traffic for several weeks.[5]
Casualties
Even though there were no deaths from the earthquake, at least two people were injured including a woman who broke her leg while rushing out of her home.[4]
See also
References
- ^ ISC (2016), ISC-GEM Global Instrumental Earthquake Catalogue (1900–2012), Version 3.0, International Seismological Centre
- ^ a b c d Pardee, J. T. (1927). "Montana Earthquake of June 27, 1925" (PDF). Retrieved 9 January 2022.
- ^ "Clarkson Valley Earthquake – Montana – June 27, 1925". devastatingdisasters.com. Devastating Disasters. Retrieved 9 January 2022.
- ^ a b "1925 – Clarkston Valley, MT – M 6¾". University of Utah. Retrieved 9 January 2022.
- ^ "1925 Clarkston Valley Earthquake". shakeout.org. The Great Montana Shakeout. Retrieved 9 January 2022.
External links
- The International Seismological Centre has a bibliography and/or authoritative data for this event.