Morne Watt

Photo of this volcano
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 15.307°N
  • 61.305°W

  • 1224 m
    4015 ft

  • 360101
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Morne Watt.

The Global Volcanism Program has no Weekly Reports available for Morne Watt.

The Global Volcanism Program has no Bulletin Reports available for Morne Watt.

Eruptive History


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


Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1997 Jul 15 1997 Jul 15 Confirmed 1 Historical Observations NE of Watt Mtn (Valley of Desolation)
1880 Jan 4 1880 Jan 4 Confirmed 2 Historical Observations NE of Watt Mtn (Valley of Desolation)
0640 ± 150 years Unknown Confirmed   Radiocarbon (uncorrected) West flank of Morne Watt
0950 BCE ± 300 years Unknown Confirmed   Radiocarbon (uncorrected) NE of Watt Mtn (Valley of Desolation)
1800 BCE ± 100 years Unknown Confirmed   Radiocarbon (uncorrected) NE of Watt Mtn (Valley of Desolation)

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.

Photo Gallery


Steam rises from Boiling Lake, a geothermal area on the NE flank of Morne Watt volcano. This phreatomagmatic explosion crater is filled by a bubbling lake about 85 x 75 m wide, with a typical depth of about 10-15 m. Both water level and temperature have varied widely during historical time. The lake was almost empty following the 1880 phreatic eruption, and again temporarily almost emptied in December 2004, when water levels dropped 10 m or more below the high-water mark.

Photo by Paul Jackson, 1998 (Seismic Research Unit, University of West Indies).
See title for photo information.
Fumarolic clouds mark the Valley of Desolation and Boiling Lake thermal areas, NE of Morne Watt (Watt Mountain) volcano in SE Dominica. The Valley of Desolation and the Boiling Lake are major tourist attractions within the national park east of Roseau. A major eruption from Morne Watt produced pyroclastic flows about 930 years ago. The only historical eruptions on the island of Dominica were a moderately large phreatic explosion at the Valley of Desolation thermal area in 1880 and a smaller phreatic explosion in July 1997.

Photo by Paul Jackson, 1998 (Seismic Research Unit, University of West Indies).
See title for photo information.
Steep-sided Morne Watt, seen here from the NW, is a lava-dome complex surrounded by block-and-ash flow deposits. The 1224-m-high volcano was constructed south of the Wotten Waven caldera and is flanked by Morne Anglais (4 km to the SW) and the Grand Soufrière Hills volcano, 3 km to the east. The renowned Valley of Depression geothermal area cuts the NE flank of Morne Watt and lies out of view to the left.

Photo by Lee Siebert, 2002 (Smithsonian Institution).
See title for photo information.

Smithsonian Sample Collections Database


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

Affiliated Sites