Nightingale Island

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  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 37.42°S
  • 12.48°W

  • 365 m
    1197 ft

  • 386011
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

28 July-3 August 2004

According to a news report, a swarm of earthquakes occurred beneath Tristan da Cunha during the nights of 28 and 29 July. A scientist monitoring seismic activity from the Preparatory Commission for the Comprehensive Nuclear Test-Ban Treaty Organization, Vienna International Centre indicated that the main swarm lasted ~8 hours and occurred ~30 km below the volcano. After the swarm, there were a few individual earthquakes and then activity tapered off.

Source: Tristan Times



 Available Weekly Reports


2004: July


28 July-3 August 2004

According to a news report, a swarm of earthquakes occurred beneath Tristan da Cunha during the nights of 28 and 29 July. A scientist monitoring seismic activity from the Preparatory Commission for the Comprehensive Nuclear Test-Ban Treaty Organization, Vienna International Centre indicated that the main swarm lasted ~8 hours and occurred ~30 km below the volcano. After the swarm, there were a few individual earthquakes and then activity tapered off.

Source: Tristan Times


Summary of eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
2004 Jul 29 2004 Jul 30 Confirmed 0 Historical Observations Submarine SE flank

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.

Baker P E, Gass I G, Harris P G, LeMaitre R W, 1964. Vulcanological report on the Royal Society expedition to Tristan de Cunha. Phil Trans Roy Soc London, 256: 439-578.

Maund J G, Rex D C, le Roex A P, Reid D L, 1988. Volcanism on Gough Island: a revised stratigraphy. Geol Mag, 125: 175-181.

Reagan M K, Turner S, Legg M, Sims K W W, Hards V L, 2008. 238U- and 232Th-decay series constraints on the timescales of crystal fractionation to produce the phonolite erupted in 2004 near Tristan da Cunha, South Atlantic Ocean. Geochim Cosmochim Acta, 72: 4367-4378.

Nightingale Island and the adjacent smaller Middle (or Alex) and Stoltenhoff Islands and associated small islets are the southernmost of the Tristan da Cunha island group. The heavily eroded Nightingale Island consists of early and late stage ash and agglomerate units with intervening massive trachytic intrusions and lava flows. Volcanic rocks were K-Ar dated at between 0.4 and 0.15 million years, and a radiocarbon date of about 39,000 yrs BP was obtained from an ash layer overlain by a lava flow. An earthquake swarm lasting 6 hours beginning on July 29, 2004 was followed by observation of large blocks of floating phonolitic pumice that washed up on Tristan da Cunha. The event was considered to have originated from an eruption associated with an earthquake swarm 37-53 km SSE of Tristan da Cunha on the submarine SE flank of Nightingale Island.