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La Grille

Photo of this volcano
  • Comoros
  • Comoros Hotspot Volcano Group
  • Shield | Shield
  • Unknown - Evidence Credible
  • Country
  • Volcanic Province
  • Landform | Volc Type
  • Last Known Eruption
  • 11.47°S
  • 43.33°E

  • 1,087 m
    3,566 ft

  • 233001
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports available 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/).
Clouds cover the flanks of the Karthala shield volcano at the S end of Grand Comore Island. A scoria cone of the northern La Grille shield volcano is on the coast in the foreground. Karthala contains a 3 x 4 km summit caldera and elongated rift zones that extend to the NNW and SE from the summit. 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 Stephen and Donna O'Meara, 2002.
Cones can be seen here on the flanks of La Grille shield volcano at the N end of Grand Comore Island (also known as Ngazidja). It is located N of Karthala volcano, and the scoria cones reach 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 W, N, and E flanks.

Copyrighted photo by Stephen and Donna O'Meara, 2002.
La Grille shield volcano forms the northern third of Grand Comore Island NW of Madagascar, with the larger Karthala forming the southern portion. The island is around 15 km wide in the area pictured. Numerous scoria cones can be seen across the summit region and flanks in this September 2019 Planet Labs satellite image monthly mosaic (N is at the top. Several tuff rings have formed along the northern coast.

Satellite image courtesy of Planet Labs Inc., 2019 (https://www.planet.com/).
GVP Map Holdings

Maps are not currently available due to technical issues.

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.

Smithsonian Sample Collections Database

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

External Sites