![]() Because Bogoslof is an island volcano, when it erupts it produces energy that moves through the ocean. Those track seismic waves that are moving through the water column. For example, last week we put in a couple of hydrophones. We are trying to be more creative in our monitoring effort. Even if we had put instruments directly on Bogoslof prior to December, they would simply have been destroyed because the island is so small.Ĭan you track eruptions after they start, despite the remoteness? Fish and Wildlife Service wilderness area. It’s a very sensitive area for marine wildlife it’s a seabird and marine mammal habitat, and a U.S. Why can’t you tell when Bogoslof is about to erupt?īogoslof is a tiny island, less than one kilometer across, and 50 kilometers away from the nearest island with monitoring equipment. Scientific American asked Michelle Coombs, a research geologist and scientist in charge at the AVO, why Bogoslof is so temperamental, and whether volcanologists will be able to say when the dangerous volcano will go off again. Ash at this height can ruin the engines of jet airplanes flying this well-traveled route between Asia and North America. The most recent event sent a plume of ash and smoke more than six miles into the atmosphere. Geological Survey’s Alaska Volcano Observatory (AVO). This was its 40th eruption since December 2016, of which 75 percent have not been predicted by the U.S. However, Bogoslof, a volcanic island in the Aleutians off the southwest coast of Alaska exploded without any warning last Saturday. Seismic activity or sulfurous gases indicate red-hot magma is nearing the surface, for example. Volcanoes often signal they are about to blow their tops days or even months in advance.
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