Simbo

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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 8.292°S
  • 156.52°E

  • 335 m
    1099 ft

  • 255050
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

Most Recent Weekly Report: 20 September-26 September 2006


Residents on Simbo Island reported feeling seven "earth tremors" on 21 September, and others in recent days. None of the events caused damage. The Solomon Islands Seismology Division does not have monitoring equipment on the island.

Source: Solomon Star

Index of Weekly Reports


2006: September

Weekly Reports


20 September-26 September 2006

Residents on Simbo Island reported feeling seven "earth tremors" on 21 September, and others in recent days. None of the events caused damage. The Solomon Islands Seismology Division does not have monitoring equipment on the island.

Source: Solomon Star


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

Simbo is a small island in the western Solomons with three truncated andesitic volcanic centers. The only Potassium-Argon date (2.3 /- 1 million years ago from Mount Patukio) suggests a Pliocene-to-Pleistocene age for the island (Solomon Islands Geological Survey, 1982). The southern half of the island is thermally active. It contains fault-related fumarolic areas and hot springs near saltwater Lake Ove along the western coast and along the eastern coast near Mount Patukio, which has a steep-walled summit crater. Grover (1955) noted native accounts of the explosive enlargement of the Ngusunu explosion crater along the SW coast of the island one to two generations prior to 1955, probably after a visit by Guppy in 1882. Press reports mentioned an eruption in the early 1900s that forced the evacuation of villages beside Lake Ove, immediately adjacent to Ngusunu crater.

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

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1910 ± 10 years Unknown Confirmed   Anthropology Ngusuna crater?

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.


Synonyms

Mandegugusu | Eddystone Island | Narove Island | Ove

Cones

Feature Name Feature Type Elevation Latitude Longitude
Patukio, Mount
    Middle Hill
Cone 305 m 8° 17' 0" S 156° 32' 0" E

Craters

Feature Name Feature Type Elevation Latitude Longitude
Ngusuna Crater 8° 17' 0" S 156° 31' 0" E
Ove, Lake Crater 8° 17' 0" S 156° 31' 0" E

Thermal

Feature Name Feature Type Elevation Latitude Longitude
Hot Lagoon Hot Spring 8° 17' 0" S 156° 32' 0" E
Kosinge Reef Thermal 8° 17' 0" S 156° 32' 0" E
The saltwater Lake Ove in the foreground is seen from the rim of Ngusuna crater with the western coast of Simbo Island in the background. Simbo is a small island in the Western Solomons with three truncated andesitic volcanic centers. Native accounts told of the explosive enlargement of the Ngusunu explosion crater along the SW coast of the island one to two generations prior to 1955, probably after a visit by Guppy in 1882, and press reports mentioned an eruption at Simbo in the early 1900s.

Photo by Chris Lyne, 2005.

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.

Fisher N H, 1957. Melanesia. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI, 5: 1-105.

Grover J C, 1955. Geology, mineral deposits and prospects of mining development in the British Solomon Islands Protectorate. Interim Geol Surv Brit Solomon Is Mem, 1: 1-151.

Katsui Y (ed), 1971. List of the World Active Volcanoes. Volc Soc Japan draft ms, (limited circulation), 160 p.

Solomon Islands Geological Survey, 1982. Vella Lavella Island. New Georgia Geol Map, sheet no 1, 1:100,000.

Taylor G R, 1976. Residual volcanic emanations from the British Solomon Islands. In: Johnson R W (ed) {Volcanism in Australasia}, Amsterdam: Elsevier, p 343-354.

Volcano Types

Stratovolcano(es)
Explosion crater(s)

Tectonic Setting

Subduction zone
Crustal thickness unknown

Rock Types

Major
Andesite / Basaltic Andesite
Basalt / Picro-Basalt

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
210
240
833
27,923

Affiliated Databases

Large Eruptions of Simbo 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.