Volcanoes of the Andean SSVZ 2, Chile Posted by agimarc on 2024-04-15 Posted in: America C & S, Volcanoes. Tagged: Andesite, Basalt, Chaiten, debris avlanche, Dome, Lahar, Liquine, Los Lagos, remote, Rhyolite, SSVZ, tephrachronology. 1 Comment Volcan Yate from Carretera Austral. Image courtesy H Brito via Andesgear Blog Continue Reading
The Tecapa – San Miguel Volcanic Cluster, El Salvador Posted by agimarc on 2024-04-01 Posted in: America C & S, Volcanoes. Tagged: Andesite, Basalt, calderas, Chaparrastique, geothermal, iignimbrite, maar, San Miguel, Tecapa. Leave a comment Tecapa – San Miguel volcanic cluster with main volcanoes labeled. Note the 1812 lava flow from the flank of San Miguel lower right. Image courtesy NASA Space Shuttle, 1986 via Smithsonian GVP Continue Reading
Al Haruj Volcanic Province, Libya Posted by agimarc on 2024-03-15 Posted in: Africa, Volcanoes. Tagged: Al Haruj, cinder cone, fissure eruption, flood basalt, intraplate, pahoehoe, sheild, Wau-en-Namus. 3 Comments Pair of cinder cones and associated lava fields in Al Haruj. Light colored patches are kipukas filled with sand and clay. These hold water temporarily in the wet parts of the year. Image courtesy N Brugge Continue Reading
Hokkaido 6 – Volcanoes of the Shiretoko Peninsula, Japan Posted by agimarc on 2024-03-01 Posted in: Asia, Volcanoes. Tagged: Andesite, Debris avalanche, faulting, flank collapse, phreatic, pyroclastic, Rausu, Shiretoko, Tenchozan, tephra. Leave a comment Winter view of Rausu volcano from the ocean offshore Shiretoko Peninsula. Image courtesy JPrail.com, Jan 2011 Continue Reading
Fernandina Island, Galapagos, Ecuador Posted by agimarc on 2024-02-15 Posted in: Pacific Islands, Volcanoes. Tagged: Basalt, Caldera, caldera collapse, Debris avalanche, Fernandina, Galapagos, hot spot, plume head, resurfacing. Leave a comment Ocean view of Fernandina Island and volcano. Image courtesy H Banwell, Oct 2016 via Galapagos Conservation Trust Continue Reading
Volcan Maipo, Chile – Argentina Border Posted by agimarc on 2024-02-01 Posted in: America C & S, Volcanoes. Tagged: Andes, Andesite, Caldera, Diamante, Dome, Maipo, permafrost, pyroclastic, rhyodacite, Southern Volcanic Zone. 5 Comments Looking across Laguna del Diamante toward Maipo. Glacial ice cap clearly visible as are a pair of what look like domes / pyroclastic cones on its eastern flank. Image courtesy Advisor Travel Continue Reading
Bayuda Volcanic Field, Sudan Posted by agimarc on 2024-01-15 Posted in: Africa, Volcanoes. Tagged: Bayuda, Great Bend, maar, monogenetic, Nile River, phreatic, scoria, Sudan. 2 Comments NASA Shuttle photo of Bayuda volcanic field, NASA 2002. Image courtesy NASA JSC Continue Reading
Japan Volcano Islands, Part 2 of 2 Posted by agimarc on 2024-01-01 Posted in: Pacific Islands, Volcanoes. Tagged: Andesite, back arc, discolored water, hydrothermal, Ioto, Iwo Jima, Izu Bonin Mariana, pumice raft, Seamount. 2 Comments Discolored water from Sept 2001 eruption at Iwo Jima (Ioto). Vent is marked by yellow arrow. Numerous phreatic eruptions and uplift is due to resurgent doming of the underwater caldera. Image courtesy Nakahori, 2001, JMA via Smithsonian GVP Continue Reading
Japan Volcano Islands, Part 1 of 2 Posted by agimarc on 2023-12-15 Posted in: Pacific Islands, Volcanoes. Tagged: Andesite, Basalt, Bonin, discolored water, eruptions, hydrothermal, Iwo Jima, Izu, Nishinoshima, Seamount. 6 Comments 2021 island-building eruption at Fukutoku – Okanoba seamount. Note floating pumice raft drifting to the right of the eruption. Image courtesy Japan Coast Guard via Kyodo and The Japan Times, Aug 2017 Continue Reading
Lamongan Volcanic Field, East Java, Indonesia Posted by agimarc on 2023-12-01 Posted in: Asia, Volcanoes. Tagged: Andesite, Basalt, cinder cone, fault, geothermal, Java, Lamongan, maar, spatter cone. 4 Comments Lamongan from the SW. Image courtesy Oystein Lund Andersen, Oct 2021 Continue Reading