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Quick Facts

The small island of Guguan, only 2.8 km wide, is composed of an eroded volcano on the south, a caldera with a post-caldera cone, and a northern volcano. The latter has three coalescing cones and a breached summit crater that fed lava flows to the west and NW. The 287-m high point of the island is the south rim of the caldera. The only known historical eruption of Guguan took place between 1882 and 1884 and produced the northern volcano and lava flows that reached the coast. From the Smithsonian Global Volcanism Program.
Latitude: 17.307° N
Longitude: 145.845° E
Elevation: 287 (m) 942 (f)
Volcano type: Stratovolcano
Composition: Andesite - Basalt
Most recent eruption: 1883 CE
Threat Potential: Moderate *