Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Marchena
A large tuff cone rises near Punta Calle on the southern coast of Marchena Island beyond fresh-looking lava flows west of the cone in the foreground. The low shield volcano forming Marchena Island contains one of the largest calderas of the Galápagos Islands. In contrast to other Galápagos volcanoes, the 6 x 7 km caldera and its outer flanks have been largely buried by a cluster of pyroclastic cones and associated lava flows. The first historical eruption of Marchena occurred in 1991. Photo by Ed Vicenzi, 1984 (Smithsonian Institution).
Volcano Number:353080
Volcano Name:Marchena
Country:Ecuador
Volcano Type:Shield
Last Eruption:1991
Elevation:343m
Tectonic Setting:Rift zone / Oceanic crust (< 15 km)
Pop. within 5km:785
Pop. within 10km:785
Pop. within 30km:785
Pop. within 100km:3001
Latitude:0.33
Longitude:-90.47



Eruption Data from the Global Volcanism Program of the Smithsonian Institution
Volcano Number Volcano Name Eruption Number Activity Type Explosivity Index Max Explosivity Index Modifier Activity Area Activity Unit Start Evidence Method Start Date End Date
353080 Marchena 11730 Confirmed Eruption 2 West to SW caldera rim Historical Observations 1991/9/25 1991/11/16
Emissions Data from the Global Volcanism Program of the Smithsonian Institution
Emission ID SO2 Kilotons Start Date End Date
319 200 1991/09/26 1991/09/26


Data from the Earthchem Portal
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Data from the SESAR Database


Data from the MaGa Database
Sorry. No data exist for this volcano in the MaGa database.