Tutuila

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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 14.295°S
  • 170.7°W

  • 653 m
    2142 ft

  • 244020
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Tutuila.

The Global Volcanism Program has no Weekly Reports available for Tutuila.

The Global Volcanism Program has no Bulletin Reports available for Tutuila.

The elongated, extensively eroded Tutuila Island in the center of the Samoan Islands consists of five Pliocene-to-Pleistocene volcanoes constructed along two or three rifts trending SSW-NNE. The Pago basaltic-to-andesitic shield volcano in the center of the 32-km-long island is truncated by an eroded, 9-km-wide caldera that encloses Pago Pago harbor on its west side. The caldera is now partially filled by cinder cones and trachytic lava domes. ENE-trending dike complexes are prominently exposed on Pago volcano. Following a lengthy period of erosion, submergence, and the construction of a barrier reef, the Leone volcanics were erupted during the Holocene along a 5-km-long N-S-trending fissure over a broad area at the southernmost part of the island (Stearns, 1944), forming a group of initially submarine tuff cones and subsequent subaerial cinder cones that produced fresh-looking pahoehoe lava flows.

The Global Volcanism Program is not aware of any Holocene eruptions from Tutuila. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Tutuila page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.



Cones
Feature Name Feature Type Elevation Latitude Longitude
Aunuu Island Tuff cone 14° 16' 59" S 170° 33' 0" W
Fagamaa Tuff cone 14° 16' 19" S 170° 45' 0" W
Fagatele Tuff cone 14° 17' 0" S 170° 45' 43" W
Futiga Cone 14° 20' 35" S 170° 45' 18" W
Olomoana Shield volcano 14° 15' 47" S 170° 34' 37" W
Olotele Cone 14° 19' 5" S 170° 46' 1" W
Pioao Cone
Taputapu Shield volcano 14° 19' 0" S 170° 47' 0" W
Vailoatai Tuff cone 14° 16' 23" S 170° 46' 37" W


Craters
Feature Name Feature Type Elevation Latitude Longitude
Alofau Pleistocene caldera 14° 16' 30" S 170° 36' 0" W
Pago Pleistocene caldera 14° 17' 0" S 170° 41' 0" W


Domes
Feature Name Feature Type Elevation Latitude Longitude
Afono Dome 14° 15' 22" S 170° 38' 35" W
Lefulufulua Dome 14° 15' 47" S 170° 34' 8" W
Leila Dome 14° 15' 43" S 170° 35' 35" W
Matafao Dome 14° 17' 42" S 170° 42' 0" W
Papatele Dome 14° 16' 41" S 170° 39' 22" W
Pioa Dome 14° 16' 19" S 170° 39' 7" W
Tau Dome 14° 18' 47" S 170° 43' 37" W
Vatia Dome 14° 14' 31" S 170° 40' 16" W
The elongated, 32-km-long island of Tutuila in the center of the Samoan Islands is seen in this Space Shuttle view (with north to the upper right). Five Pliocene-to-Pleistocene volcanoes were constructed along rift zones, and the Pago shield volcano in the center of the island was truncated by an eroded, 9-km-wide caldera that incorporates Pago Pago harbor (right-center). Following a lengthy period of erosion, the Leone tuff cones and cinder cones were erupted during the Holocene across the southernmost portion of the island (left-center).

NASA Space Shuttle image ISS002-701-263, 2001 (http://eol.jsc.nasa.gov/).
Rocky cliffs and offshore rocky island mark the rugged coastline of Tutuila Island. The elongated, extensively eroded Tutuila Island in the center of the Samoan Islands consists of five Pliocene-to-Pleistocene volcanoes constructed along two or three rifts trending SSW-NNE. Following a lengthy period of erosion, submergence, and the construction of a barrier reef, the Leone volcanics were erupted during the Holocene along a 5-km-long N-S-trending fissure, forming a group of cinder cones that produced fresh-looking pahoehoe lava flows.

Photo by Tavita Togia, 2004 (U. S. National Park Service).

The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. 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.

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

Macdonald G A, 1968. A contribution to the petrology of Tutuila, American Samoa. Geol Rundschau, 57: 821-837.

Stearns H T, 1944. Geology of the Samoan Islands. Geol Soc Amer Bull, 55: 1279-1332.

Walker G P L, Eyre P R, 1995. Dike complexes in American Samoa. J Volc Geotherm Res, 69: 241-254.

Volcano Types

Tuff cone(s)
Cinder cone(s)

Tectonic Setting

Subduction zone
Oceanic crust (< 15 km)

Rock Types

Major
Basalt / Picro-Basalt
Andesite / Basaltic Andesite
Trachyte / Trachyandesite

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
16,653
49,763
56,239
67,387

Affiliated Databases

Large Eruptions of Tutuila Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
WOVOdat WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
EarthChem EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).
Smithsonian Collections Search the Smithsonian's NMNH Department of Mineral Sciences collections database. Go to the "Search Rocks and Ores" tab and use the Volcano Name drop-down to find samples.