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Crête de la Novara

St. Paul

Stratovolcano · France · 268m

A small 1.8-km-wide caldera cuts the E side of uninhabited St. Paul Island, as depicted in this plate from the SMS Gazelle expedition. The flooded caldera has 300-m-high walls on the SW side and is narrowly constrained by low spits on the NE. Geothermal areas are located along the caldera rim and along the margins of the caldera bay. The entire NE half of the volcano forming much of the island now lies beneath the sea.
A small 1.8-km-wide caldera cuts the E side of uninhabited St. Paul Island, as depicted in this plate from the SMS Gazelle expedition. The flooded caldera has 300-m-high walls on the SW side and is narrowly constrained by low spits on the NE. Geothermal areas are located along the caldera rim and along the margins of the caldera bay. The entire NE half of the volcano forming much of the island now lies beneath the sea. · Photo: Plate from the SMS Gazelle expedition (courtesy of NOAA Photo Library). · Wikimedia Commons
Type
Stratovolcano
Country
France
Region
Somalian-Antarctic Volcanic Regions / Amsterdam-St. Paul Hotspot Volcano Group
Elevation
268m
Coordinates
-38.720, 77.530
Last eruption
1793
Tectonic setting
Rift zone / Oceanic crust (< 15 km)
Landform
Composite
Major rock type
Basalt / Picro-Basalt
Geological summary

The uninhabited triangular island of St. Paul is located near the axis of the East Indian Ocean Ridge, 80 km S of Amsterdam Island. It is composed of an older tuff cone surmounted by a basaltic stratovolcano with a 1.8-km-wide caldera. The entire NE half of the volcano was submerged following collapse along a NW-trending fault. This breached the central caldera, leaving an 80-m-deep bay connected to the ocean by a narrow channel. Geothermal areas are located near the caldera rim and along the margins of the caldera bay. The only recorded eruption took place in 1793 from a vent on the lower SW flank.

From Wikipedia

Île Saint-Paul is an island forming part of the French Southern and Antarctic Lands in the Indian Ocean, with an area of 6 km2. The island is located about 90 km (56 mi) south of the larger Île Amsterdam 55 km2 (21 sq mi), 1,300 kilometres (810 mi) northeast of the Kerguelen Islands, and 3,000 km (1,900 mi) southeast of Réunion.

Wikipedia · CC BY-SA · Read full article →

Eruption history

Summary (VEI over time)
Click a bar to see individual eruptions
1793~1793 · 1 eruptions · max VEI 217931793179417941794

Detailed timeline

  1. 1793VEI 2Observed
    1793 – Ongoing
    SW flank (near Cape West)

External links

⚠ For reference only. Not for emergency response.