Episode 2 of 2
Aftershock Activity
- When
- from 1872-12-14
- Where
- Idaho and southern British Columbia
Aftershocks followed the mainshock, felt over a broad area including Idaho and southern British Columbia.
Aftershocks occurred in the initial 24 hours, strong enough to be felt from Idaho to southern British Columbia. The Entiat area remained seismically active into the 20th century, leading to speculation that these were long-lived aftershocks from the 1872 event.
Sources
- 1872 North Cascades earthquake Wikipedia, revision of 2026-07-26
Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.