Maug Islands Volcano
Updated: Nov 9, 2025 02:03 GMT -
Stratovolcano
United States, Mariana Islands, 20.02°N / 145.22°E 
Summit height: 227 m / 745 ft
Current status: normal or dormant (1 out of 5)
[smaller] [larger]
Maug Islands volcano eruptions: unknown, no recent eruptions
Latest nearby earthquakes
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Background
Three small elongated islands up to 2.3 km long mark the northern, western, and eastern rims of a largely submerged 2.5-km-wide caldera. The highest point of the Maug Islands reach only 227 m above sea level; the submerged southern notch on the caldera rim lies about 140 m below sea level. The caldera has an average submarine depth of about 200 m and contains a twin-peaked central lava dome that rises to within about 20 m of the sea surface. The Maug Islands form a twin volcanic massif with Supply Reef, about 11 km to the north. The truncated inner walls of the caldera on all three islands expose lava flows and pyroclastic deposits that are cut by radial dikes; bedded ash deposits overlie the outer flanks of the islands. No eruptions are known since the discovery of the islands by Espinosa in 1522. The presence of poorly developed coral reefs and coral on the central lava dome suggests a long period of general quiescence, although it does not exclude mild eruptions (Corwin, 1971). A recent NOAA expedition detected possible evidence of submarine geothermal activity.---
Smithsonian / GVP volcano information
Latest satellite images
Maug Islands Volcano Maps
Below is a selection of maps showing the location and surroundings of the volcano at various resolutions based on aerial-imagery / terrain maps. Feel free to use them for non-commercial purposes on your blog or website as long as you credit them with a link back to this page (click to copy it).
Satellite/aerial-type map of Maug Islands volcano (world scale)
Terrain-type map of Maug Islands volcano (world scale)
Satellite/aerial-type map of Maug Islands volcano (region scale large)
Terrain-type map of Maug Islands volcano (region scale large)
Satellite/aerial-type map of Maug Islands volcano (region scale medium)
Terrain-type map of Maug Islands volcano (region scale medium)
Satellite/aerial-type map of Maug Islands volcano (region scale small)
Terrain-type map of Maug Islands volcano (region scale small)
Satellite/aerial-type map of Maug Islands volcano (local scale large)
Terrain-type map of Maug Islands volcano (local scale large)
Satellite/aerial-type map of Maug Islands volcano (local scale medium)
Terrain-type map of Maug Islands volcano (local scale medium)
Satellite/aerial-type map of Maug Islands volcano (local scale small)
Terrain-type map of Maug Islands volcano (local scale small)
Satellite/aerial-type map of Maug Islands volcano (scale of 10s of km)
Terrain-type map of Maug Islands volcano (scale of 10s of km)
Satellite/aerial-type map of Maug Islands volcano (scale of 20-40 km)
Terrain-type map of Maug Islands volcano (scale of 20-40 km)
Satellite/aerial-type map of Maug Islands volcano (scale of approx. 10-20 km)
Terrain-type map of Maug Islands volcano (scale of approx. 10-20 km)
Satellite/aerial-type map of Maug Islands volcano (scale of 5-10 km)
Satellite/aerial-type map of Maug Islands volcano (scale of few kilometers)
