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La Grille

Photo of this volcano
  • Comoros
  • Middle East and Indian Ocean
  • Shield
  • Unknown - Evidence Credible
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 11.47°S
  • 43.33°E

  • 1087 m
    3566 ft

  • 233001
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for La Grille.

The Global Volcanism Program has no Weekly Reports available for La Grille.

The Global Volcanism Program has no Bulletin Reports available for La Grille.

The Global Volcanism Program has no synonyms or subfeatures listed for La Grille.

Eruptive History

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

Deformation History

There is no Deformation History data available for La Grille.

Emission History

There is no Emissions History data available for La Grille.

Photo Gallery

Grand Comore Island in the Indian Ocean NW of Madagascar is formed by two massive shield volcanoes. The more well-known and historically active Karthala volcano at the southern end of the island has a 3 x 4 km summit caldera. Elongated rift zones extend to the NNW and SE; the lower SE rift zone forms the Massif du Badjini, a peninsula at the SE tip of the island (bottom right). The Holocene La Grille volcano forms the northern part of the island. Youthful lava flows from both volcanoes have reached the coast.

NASA Space Shuttle image STS009-39-2516, 1983 (http://eol.jsc.nasa.gov/).
See title for photo information.
Cloud banks drape the flanks of the massive Karthala shield volcano at the southern end of Grand Comore Island. A pyroclastic cone of La Grille, another massive shield volcano that forms the northern part of the island, lies along the coast in the foreground. Karthala contains a 3 x 4 km summit caldera, and elongated rift zones extend to the NNW and SE from the summit of the Hawaiian-style shield. More than twenty eruptions have been recorded at Karthala since the 19th century, but no historical eruptions are known from La Grille volcano.

Copyrighted photo by Steve and Donna O'Meara, 2002.
See title for photo information.
Pyroclastic cones drape the eastern flanks of La Grille shield volcano at the northern end of Grand Comore Island (also known as Ngazidja). La Grille contrasts with its larger and more well-known neighbor to the south, Karthala volcano, in its lack of a summit caldera and in its abundance of pyroclastic cones up to 800 m in height. Recent lava flows, some perhaps as young as a few hundred years, have reached the sea from fissures on the lower western, northern, and eastern flanks of La Grille.

Copyrighted photo by Steve and Donna O'Meara, 2002.
See title for photo information.
GVP Map Holdings

The maps shown below have been scanned from the GVP map archives and include the volcano on this page. Clicking on the small images will load the full 300 dpi map. Very small-scale maps (such as world maps) are not included. The maps database originated over 30 years ago, but was only recently updated and connected to our main database. We welcome users to tell us if they see incorrect information or other problems with the maps; please use the Contact GVP link at the bottom of the page to send us email.

Title: Comoros, Madagascar, Seychelles
Publisher: DMA Aerospace Center
Country: Comoros, Madagascar
Year: 1987
Series: ONC
Map Type: Topographic
Scale: 1:1,000,000
Map of Comoros, Madagascar, Seychelles
Smithsonian Sample Collections Database

There are no samples for La Grille in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

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