Onset of the 1866 volcanic eruption in the Santorini caldera
- When
- 1866
- Where
- Santorini caldera
- Episodes
- 1
The 1866 volcanic eruption in the Santorini caldera began as part of a major eruptive sequence lasting until 1870. Activity was concentrated on Nea Kameni, a small island formed by dacite lava and ash over two millennia. The legacy date of 26 January 1866 is a placeholder, as no specific onset date is provided in the source passages.
Episodes
Background and detail
Background. Nea Kameni is a small, uninhabited Greek island of volcanic origin located within the flooded Santorini caldera. It formed over the past two millennia through repeated eruptions of dacite lava and ash. The island represents the current centre of activity in the caldera, following an undersea breach in 1707. Major eruptions over the past 300 years include the 1866–1870 sequence.
Onset. The 1866 eruption is recorded as a major event in the Santorini caldera. The legacy data suggests a start date of 26 January 1866, but the source passages do not confirm this specific day. The eruption is part of a sequence that continued into 1870. No specific observers or exact onset details are available in the provided passages.
Sources
- Nea Kameni Wikipedia, revision of 2026-05-24
- Santorini Wikipedia, revision of 2026-09-26
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.