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It was downgraded to green status in June 2020.

During that period, the volcano went on to erupt and produced lava flows, pyroclastic flows and mudflows. The volcano was elevated to yellow advisory level in July 2019. Shishaldin is one of the most active volcanoes that are part of the Aleutian Island arc, with 26 confirmed eruptions since 1824. The last four significant ash events during the current eruption resulted in ash clouds with heights up to 40,000 feet above sea level, similar to other historical eruptions. MYSTERIOUS 'NOODLY LINE' IN OCEAN FLOOR LEADS TO IMPORTANT DISCOVERY OFF ALASKAN COAST At least two explosions were seen coming from the volcano and sent ash and steam into the air. It sits west of another stratovolcano known as Mount Takawangha, which last erupted in 1550. The most recent was in 1914 and produced lava flows. There have been three known eruptions since 1763. Coast Guard flight confirmed that lava was erupting from the summit of Shishaldin. Tanaga ( Aleut: Kusuuginax) 2 3 is a 5,924-foot (1,806 m) stratovolcano in the Aleutian Range of the U.S. 3 June, 1200-1800: volcano quiet, cone darkened by ash, or exposed rock due to melted snow. The AVO issued an Orange Watch on their volcano alert scale shortly after the detection, which means a volcano is "exhibiting heightened or escalating unrest with increased potential of eruption," with an uncertain time frame, or that an eruption is under way but poses limited hazards. The Alaska Volcano Observatory (AVO) responded to eruptions, possible eruptions, volcanic unrest, and reports of unusual activity at or near eight separate. 2 June, 1450: pilot reported volcano steaming, extensive ash deposits visible on top and E flank of cone. This follows a several-hour increase in seismic tremor and an increase in temperatures at the volcano seen in satellite data.

The plume was moving east-northeast as the National Weather Service issued an aviation advisory warning of hazardous weather in progress for the ash cloud.Ī Marine Weather Statement was issued for possible trace ash on waters northeast of the volcano.ĪLASKA'S SHISHALDIN VOLCANO EXPLOSION SENDS ASH AND STEAM 40,000 FEET INTO THE AIRĮxplosion signals were detected in infrasound data since at least 2 a.m. July 21, 2023Reference map of recent Klauea summit eruption. local time.Įarlier on Wednesday, a low-level ash cloud was sent about 15,000 feet into the air early Wednesday. The Alaska Volcano Observatory (AVO) said meteorological clouds up to 20,000 to 25,000 feet above sea level began obscuring views of the volcano beginning at around 11:30 a.m. UNIMAK ISLAND, Alaska – The eruption of Shishaldin Volcano in Alaska's Aleutian Islands has slowed down, after explosive eruptive activity occurred at the volcano Wednesday morning.