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Country: | United States | |
| Subregion Name: | Mariana Islands | ||
| Volcano Number: | 0804-19= | ||
| Volcano Type: | Stratovolcano | ||
| Volcano Status: | Historical | ||
| Last Known Eruption: | 1883 ± 1 year | ||
| Summit Elevation: | 287 m | 942 feet | |
| Latitude: | 17.307°N | 17°18'26"N | |
| Longitude: | 145.845°E | 145°50'41"E | |
| 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. Freycinet misidentifed Guguan with Alamagan; reported eruptions in 1819 and 1901 (Catalog of Active Volcanoes of the World) actually refer to solfataric activity on Alamagan (Corwin, 1971). 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. | |||
