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  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 0.22°S
  • 90.77°W

  • 920 m
    3018 ft

  • 353090
  • Latitude
  • Longitude

  • Summit

  • Volcano

There are no activity reports for Santiago.

 Available Weekly Reports

There are no Weekly Reports available for Santiago.

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

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1904 1906 Dec 15 ± 45 days Confirmed 0 Historical Observations SE flank
1897 Unknown Confirmed 0 Historical Observations SE flank (Sullivan Bay?)
1759 ± 75 years Unknown Confirmed   Anthropology West flank (James Bay)

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.

IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..

McBirney A R, Williams H, 1969. Geology and petrology of the Galapagos Islands. Geol Soc Amer Mem, 118: 1-197.

Richards A F, 1962. Archipelago de Colon, Isla San Felix and Islas Juan Fernandez. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI, 14: 1-50.

Simkin T, 1976. . (pers. comm.).

Swanson F J, Baitis H W, Lexa J, Dymond J, 1974. Geology of Santiago, Rabida, and Pinzon Islands, Galapagos. Geol Soc Amer Bull, 85: 1803-1810.

White W M, McBirney A R, Duncan R A, 1993. Petrology and geochemistry of the Galapagos Islands: Portrait of a pathological mantle plume. J Geophys Res, 98: 19,533-19,563.

The elongated shield volcano of Santiago Island, also known as San Salvador Island or James Island, is dotted with Holocene pyroclastic cones. Fresh-looking lava flows from these cones blanket the flanks of the volcano. The 920-m-high summit ridge, lined with a chain of NW-trending cinder and spatter cones, is located at the NW end of the island. Prominent flank tuff cones occur at the western and eastern coasts of Santiago. The most recent activity at Santiago has been concentrated at the NW and SE ends of the island. The spectacular pahoehoe lava flows at James and Sullivan Bays, on opposite ends of the island, were erupted during historical time. The James Bay flows were dated by fragments of marmalade pots left by buccaneers in 1684 that were subsequently embedded in the lava flows described by Charles Darwin in 1835.