- Info & Contacts
The Global Volcanism Program has no activity reports for Guguan.
The Global Volcanism Program has no Weekly Reports available for Guguan.
Reports are organized chronologically and indexed below by Month/Year (Publication Volume:Number), and include a one-line summary. Click on the index link or scroll down to read the reports.
06/1992 (BGVN 17:06) No gas emission
06/1992 (BGVN 17:06) No gas emission
A six-member team of USGS volcanologists visited the Commonwealth of the Northern Mariana Islands 11-27 May 1992 at the request of the CNMI Office of Civil Defense. Observations [of Guguan] from an airplane on 13 May and a helicopter on 21 May revealed no gas emission.
Information Contacts: R. Moore, USGS; R. Koyanagi, M. Sako, and F. Trusdell, HVO.
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.
Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).
|Start Date||Stop Date||Eruption Certainty||VEI||Evidence||Activity Area or Unit|
|[ 1901 ]||[ Unknown ]||Discredited|
|1883 ± 1 years||Unknown||Confirmed||2||Historical Observations|
|[ 1819 ]||[ Unknown ]||Discredited|
The Global Volcanism Program has no synonyms or subfeatures listed for Guguan.
|The northern volcano on the small, 2.8-km-wide island of Guguan is seen here from the west. The only known historical eruption of Guguan took place between 1882 and 1884 and formed the northern cone, which has three coalescing craters. Fresh lava flows that form the left coastline were produced during that eruption.
Photo by Norm Banks, 1981 (U.S. Geological Survey).
|The small island of Guguan is seen here in an aerial view from the NW. The 2.8-km-wide island in the central Marianas Islands is composed of an eroded volcano at the south and a caldera with a post-caldera cone. A northern volcano seen here in the foreground, was the site of the only historical eruption of Guguan in the 19th century. The northern volcano 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.
Photo by Dick Moore, 1992 (U.S. Geological Survey).
The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title.
Bloomer S H, Stern R J, Smoot N C, 1989. Physical volcanology of the submarine Mariana and Volcano arcs. Bull Volc, 51: 210-224.
Corwin G, 1971. Quaternary volcanics of the Mariana Islands. Unpublished manuscript, 137 p.
Katsui Y (ed), 1971. List of the World Active Volcanoes. Volc Soc Japan draft ms, (limited circulation), 160 p.
Kuno H, 1962. Japan, Taiwan and Marianas. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI, 11: 1-332.
Meijer A, Reagan M, 1983. Origin of K2O-SiO2 trends in volcanoes of the Mariana arc. Geology, 11: 67-71.