Located on Russia’s Kamchatka Peninsula, Klyuchevskaya (also spelled Kliuchevskoi) is one of the world’s most active volcanoes. Erupting since Aug. 15, 2013, the volcano's intensity surged in October.
More than 100 flank eruptions have occurred at the stratovolcano during the last 3,000 years, according to Smithsonian’s Global Volcanism Program. Twelve confirmed eruptions have occurred since 2000. While the most explosive activity had subsided by Oct. 20, lava flows continue, and Klyuchevskaya remains seismically active.
Image courtesy of NASA.