The volcanic Graham Island briefly emerges in the Mediterranean
- When
- 1831–1832
- Where
- Submarine volcano Empedocles; Graham Island
- Episodes
- 3
In July 1831, a new volcanic island emerged in the Mediterranean Sea near Sicily, forming the tip of the submarine volcano Empedocles. Composed of loose tephra, the island rapidly grew to a maximum size in August before eroding and disappearing beneath the waves by January 1832. During its brief existence, multiple nations claimed sovereignty, though the dispute remained unresolved due to the island's rapid subsidence.
Episodes
- Emergence of the Island
Volcanic activity led to the formation of a new island in the Mediterranean Sea near Sicily in July 1831.
- Sovereignty Claims
Multiple nations claimed sovereignty over the newly emerged island, leading to a four-way dispute that remained unresolved.
- Disappearance of the Island
The island, composed of loose tephra, rapidly eroded and disappeared beneath the waves in January 1832.
Background and detail
Background. Graham Island, also known as Isola Ferdinandea or Île Julia, is a submerged volcanic island in the Mediterranean Sea near Sicily. It forms the tip of the submarine volcano Empedocles, located 30 km south of Sicily within the Campi Flegrei del Mar di Sicilia. The island has emerged from sea level four times in recorded history, with its most recent appearance occurring in July 1831.
Emergence and Growth. Reports of high seismic activity and eruptions began between 28 June and 10 July 1831. By 17 July, a fully grown islet had formed, allowing Sicilian customs official Michele Fiorini to land and claim the island for the Kingdom of Sicily. The eruptions resulted in the island increasing to about four square kilometres, reaching a maximum circumference of 4,800 m and height of 63 m in July and August 1831.
Erosion and Disappearance. The island was composed of loose tephra, easily eroded by wave action. When the eruptive episode ended, it rapidly subsided, disappearing beneath the waves in January 1832. By 17 December 1831, officials reported no trace of it. The rapid erosion occurred before the issue of its sovereignty could be resolved, leaving the four-way dispute unresolved.
People involved
- Michele Fiorini · Sicilian customs official
- Humphrey Fleming Senhouse · Captain of HMS St Vincent
- Sir James Graham · First Lord of the Admiralty
- Scinà Domenico · Italian observer
- Carlo Gemmellaro · Teacher of geology and mineralogy at Catania University
Sources
- Graham Island (Mediterranean Sea) Wikipedia, revision of 2026-07-20
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.