On April 22, the Land Imager 2 on Landsat 9 captured a satellite image of Frosti Volcano. This Alaska Plains volcano has been inactive for thousands of years since its last eruption. Frosty Peak is a plains volcano located in the Aleutian Island Chain of Alaska. Although the volcano has been dormant for thousands of years, the rocks beneath its glacial summit tell the story of its vibrant past.
Volcanic geological surveys have shown that the crater at the top of Frosty Mountain is composed of two condensed craters. The volcanic activity likely began from a central vent, with fissures in the volcano's sides promoting its growth. But later in the volcano's development, volcanic activity shifted to a new main vent, forming today's twin-crater summit.
According to the U.S. Geological Survey, explosive activity occurred at intervals throughout the growth of Frosti Volcano's main cone. But most of its eruptive activity is extrusive, in which basalt lava flows from vents.
To the south of Frosty Volcano lies Morzovoi Volcano, an extensively eroded plain volcano with a long U-shaped valley extending from its central crater. Only remnants of the volcano remain, the isolated peaks being fragments of the original crater rim.
The two volcanoes have remained relatively quiet for thousands of years. In July and August 2001, the Alaska Volcano Observatory received several reports of steam spewing from Frosty Volcano. After some investigation, the observatory determined that the volcano was still inactive. Hishaldin volcano is located on Unimak Island southwest of the Cold Bay complex. It is a relatively active volcano and has exploded at least 13 times since July 2023.
NASA Earth Observatory image by Lauren Dauphin, using Landsat data provided by the U.S. Geological Survey.
Compiled source: ScitechDaily