Episode 1 of 2
Main Shock
- When
- 3 May 1887
- Where
- Teras mountain range
The earthquake occurred at 22:13 UTC on 3 May in the Teras mountain range, causing significant damage.
The event struck northwestern Mexico with an estimated magnitude of 7.6. Damage was recorded up to 200 kilometers from the epicenter in both Mexico and the United States. It produced the longest recorded normal-fault surface rupture in historic time at that point.
Sources
- 1887 Sonora earthquake Wikipedia, revision of 2026-09-12
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.