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Magma found beneath volcano-less country | Geophysical Institute A volcanic crater northeast of Healy, Alaska, that is part of the Buzzard Creek maars Photo by Chris Nye From left, Cole Richards, Lynn Kaluzienski and Carl Tape prepare to stick seismometers in frozen ground during a February 2019 mission to deploy instruments along the Denali seismic fault Photo by Ned Rozell
Espenberg Maars | Geophysical Institute These maars were created on the low plain between Shishmaref and Cape Espenberg at the northeast tip of the Seward Peninsula, just across the sound from Kotzebue
Maar Formation | Geophysical Institute At first it was not obvious whether the new activity was the beginning of a volcano or a transient breaching of the surface that would eventually lead to the formation of water-filled pits called maars Maars are found elsewhere in the world, including the north side of the Seward Peninsula, near Cape Espenberg
The Mystery of the Denali Gap | Geophysical Institute Called maars, the craters are smallish volcanoes that form when molten rock reaches up from within the ground and detonates as it reaches the water table The craters near Buzzard Creek are made up of the same stuff as the Aleutian Arc In 1912, Katmai, one of the volcanoes in the arc, hosted the largest eruption on the planet this century
Volcanoes, permafrost, earthquakes shape Alaska The result was one of about a dozen maars in Alaska, and the largest known maar crater in the world Volcanoes’ interaction with permafrost results in one unusual Alaska landform, and Beget described another at the same conference—a landscape covered with boulders that a giant earthquake shook loose from a mountain