gaining a net , compared to its previous area of . Bogoslof continued to grow in the following weeks, reaching a size of on January 11, 2017, and merging again into a single island. 02:08 UTC on 20 February (17:08 AKST on 19 February): A significant explosive eruption began at Bogoslof volcano. Seismic and infrasound data showed a series of short-lived explosive pulses through 02:45 UTC; seismicity decreased slightly since then. Recent satellite images show a cloud as high as 25,000 ft asl. 11 March 2017: Bogoslof was in size, having more than tripled in size, and forming into a large circular island around the central vent, and would likely continue to grow. 10 May 2017: Bogoslof was estimated to have an area of about 319 acres or 1.3 square kilometers. 17 May 2017: An eruption sent ash 34,000 feet into the atmosphere. 28 May 2017: Another eruption sent ash as high as 35,000 feet and raised Aviation Color Code to red, its highest level. Ash that rises above 20,000 feet is a threat to airliners in the area The National Weather Service Alaska Aviation Weather Unit also issued an alert that the ash cloud may climb as high as 50,000 feet. 30 August 2017: An eruption occurred, with slight volcanic activity continuing into early December, after which the volcano appeared to return to relative inactivity. Gallery See also Bogoslof Wilderness List of National Natural Landmarks List of volcanoes in the United States of America References External links Volcanoes of the Alaska Peninsula and Aleutian Islands-Selected Photographs Bogoslof Island: Block 1069, Census Tract 1, Aleutians West Census Area, Alaska United States Census Bureau Active volcanoes Islands of the Aleutian Islands Islands of Aleutians West Census Area, Alaska National Natural Landmarks in Alaska Submarine volcanoes Volcanoes of Alaska Volcanoes of the Aleutian Islands New islands Uninhabited islands of Alaska Volcanoes of Unorganized Borough, Alaska Stratovolcanoes of the United States Islands of Alaska Islands of Unorganized Borough, Alaska