This week, a volcano in Alaska’s Aleutian Islands has seen a flurry of earthquakes, raising the possibility that it might erupt. Scientists are observing “substantial instability” beneath the volcanoes, and observers are worried but still don’t know what will happen. On March 8, earthquake activity increased beneath Tanaga Volcano, while on March 9, Seismic activity reached a higher level.
A Suspected Volcanic Eruption In Alaska Has Been Cited After “A Whole Lot Of Tremors” Was Detected
Tanaga Volcano has been shaking for some time now, and scientists at the Alaska Volcano Observatory have warned that an eruption is possible.
The observatory reported on Facebook that seismic activity began to rise “slowly” under the volcano on the uninhabited island around 1:30 p.m. local time on March 8. The situation became direr by 8:45 p.m. on that same day. The observatory said that there were two or three tremors every minute.
Scientists at the USGS observatory in Anchorage reported that a swarm of quakes at Alaska volcano could mean an eruption, as research geophysicist John Power put it to the Associated Press. The observatory said that the magnitude of the earthquakes has ranged from 2 to 3. A threat is posed by their location directly under the volcano’s peak.
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“It indicates that we’re seeing tremendous unrest at the volcano,” Power told the Associated Press.
Therefore, the volcano’s warning status elevated from “NORMAL” to “ADVISORY.” The United States Geological Survey (USGS), part of the United States Department of the Interior, uses this as the second of four tiers. The USGS says a volcano has an advisory alert when it shows signs of elevated unrest above the general background level.
Power told the Associated Press that an eruption cannot be ruled out just yet, despite the elevated hazard level and the number of tremors. You may see the official tweet by Global News Daily in which The Alaska Volcano Observatory raised the alert level to advisory status for Tanaga Volcano.
Alaska Volcano Dormant For A Century Delivering Ominous Warning Signs
The Alaska Volcano Observatory raised the alert level to advisory status for Tanaga Volcano on Tuesday following a series of earthquakes. The largest of the quakes have magnitudes between 2.0 and 3.0, with… https://t.co/bzbOlXdiWC pic.twitter.com/hhyOpsqMk0
— Global News Daily (@gndupdates) March 10, 2023
On the other hand, “we are concerned about it enough that we have gone and raised the warning level,” he said.
The volcano is the tallest of three volcanic peaks on Tanaga Island and is monitored using local seismic and infrasound networks, regional infrasound and lightning detection networks, and satellite data. The island is roughly 50 miles west of Adak and 1,260 miles southwest of Anchorage; both points are in the Andrean Islands.
The observatory said on Facebook that the last recorded eruption of Tanaga occurred in 1914. Before that, reports of eruptions appeared in 1763, 1770, 1791, and 1829. As evidenced by deposits on the mountain, the observatory believes these eruptions produced blocky lava flows and infrequent ash clouds.
Power told the Associated Press that the red rivers of lava that most people see when they think of a volcanic explosion are more likely to be replaced by the viscous, slow-moving lava observed during the 1980 eruption of Mount St. Helens. He said airplanes would be most at risk because the islands are right under the jets’ routes to fly between North America and Asia.
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