No latest activity reported for Maderas.

Below is a summary of eruption dates and Volcanic Explosivity Indices (VEI).

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. 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. Additional discussion of data sources can be found under Volcano Data Criteria.

Carr M J, 1984. Symmetrical and segmented variation of physical and geochemical characterisitics of the Central American volcanic front. {J Volc Geotherm Res}, 20: 231-252

IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. {IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior}.

Kerle N, van Wyk de Vries B, 2001. The 1998 debris avalanche at Casita Volcano, Nicaragua; investigation of structural deformation as the cause of slope instability using remote sensing. {J Volc Geotherm Res}, 105: 49-63

McBirney A R, Williams H, 1965. Volcanic history of Nicaragua. {Univ Calif Pub Geol Sci}, 55: 1-65

Smithsonian Institution-GVN, 1990-. [Monthly event reports]. {Bull Global Volc Network}, v 15-33

Stoiber R E, Carr M J, 1973. Quaternary volcanic and tectonic segmentation of Central America. {Bull Volc}, 37: 304-325

van Wyk de Vries B, Borgia A, 1996. The role of basement in volcano deformation. {In}: McGuire W J, Jones A P and Neuberg J (eds) {Volcano Instability on the Earth and Other Planets}, Geol Soc London Spec Pub, 110: 95-110

Volcán Maderas is a roughly conical, 1394-m-high stratovolcano that forms the SE end of the dumbbell-shaped Ometepe island in Lake Nicaragua. The basaltic-to-dacitic volcano is cut by numerous faults and grabens, the largest of which is a NW-SE-oriented graben that cuts the summit and has at least 140 m of vertical displacement. The small Laguna de Maderas lake occupies the bottom of the 800-m-wide summit crater, which is located at the western side of the central graben. The SW side of the edifice has been affected by large-scale slumping. Many pyroclastic cones are situated on the lower NE flank down to the level of Lake Nicaragua. The latest period of major growth of Maderas took place more than 3000 years ago. No confirmed historical eruptions are known from the volcano. A lahar in September 1996 killed six persons in an east-flank village, but associated volcanic activity was not confirmed.