Tag / lahar

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  • Volcanoes and Glaciers Shape Alaskan Landscape

    Volcanic eruptions mark the beginnings of new landscapes. Ash and lava cover existing vegetation and map out a fresh terrain. Though researchers understand how volcanic landscapes evolve over centuries, there is little understanding of how volcanic eruptions have influenced the geomorphology, or the relationship between the Earth’s surface and geological structures, according to Christopher F. Waythomas, from…

  • Calbuco Erupts a Third Time, with New Mudflows

    The glacier-covered volcano Calbuco in southern Chile has erupted for the third time today, after a few days of relative inactivity. It is sending forth a plume of ash 5 kilometers into the atmosphere, and it has created new mudslides, which are  associated with melting of glaciers as well as with recent rainfall. As in its…

  • Eruption in Glacier-covered Volcano in Chile

    One of South America’s most active volcanoes, Villarrica, erupted Tuesday, 3 March 2015,  around 3 a.m. local time in Chile, creating a danger that lava would interact with the large ice cap on the mountain. The volcano spewed a lava fountain 1.5 kilometers into the air, and the pillar of smoke and ash reached 6-8…