The chance of such a supervolcano eruption happening. Sitka, with a population of about 8,400 people, is 14 miles away. Tsunami waves surged ashore the coast of Tonga on Jan. 15 after the Hunga Tonga-Hunga Haapai volcano erupted about 40 miles north of the Pacific nation. A new information update, released Friday, shows the earthquakes have continued, hikers have observed gas bubbling from the ground near the volcano, and satellite radar measurements show the ground around the volcano bulging upward. Additional ash-producing events could occur again with little warning. U.S. Geological Survey He said if activity increases, Adak could get ashfall from Great Sitkin, located on an island about 27 miles away. All times are local unless otherwise stated. Semisopochnoi is the westernmost of the active volcanoes, sitting near the far end of the Aleutian chain. About the same time, the observatory will be placing three or four additional instrument stations on the volcano. The recent volcanic eruption in Tonga was significant- the explosion was heard along coastal Alaska. James Brooks is a longtime Alaska reporter, having previously worked at the Anchorage Daily News, Juneau Empire, Kodiak Mirror and Fairbanks Daily News-Miner. Great Sitkin Volcano is monitored by local seismic and infrasound sensors, satellite data, web cameras, and regional infrasound and lightning networks. Other volcanoes have had similar amounts of deformation without erupting, Coombs said, noting that the ground around Laguna del Maule in Chile has been bulging outward even more quickly than Edgecumbe, and for a longer period, without an eruption. No historical eruptions are known from Takawangha; however, field work shows that recent eruptions have occurred and it is possible that historic eruptions attributed to Tanaga may instead have come from Takawangha. Mount Edgecumbe is now considered a high risk volcano, one step below the states very high risk volcanoes: Augustine, Spurr, Redoubt, Akutan and Makushin. If the gas bubbling through the lakes is magmatic, she said, itll be another sign of activity at the volcano. I guess I trust the science on it, Kluting said. . Please see our republishing guidelines for use of photos and graphics. Due to a reduction of volcanic unrest at Cleveland Volcano over the past few months, on Thursday Alaska Volcano Observatory downgraded the Aviation Color Code and Volcano Alert Level from YELLOW/ADVISORY to UNASSIGNED/UNASSIGNED. The nearest community, Cold Bay, sits about 35 miles from the volcano. The volcano is 5,820 miles away (9,360 km). Internally, how we think about Edgecumbe has changed. The Alaska Volcano Observatory is planning to install a series of seismic instruments on Mount Edgecumbe near Sitka afterpreliminary measurementsshowed magma moving deep below the Mount Fuji-shaped volcano. State of Art: Former Alaska wildlands firefighter turned romance author takes the indie route, Alaska News Nightly: Wednesday, March 1, 2023, Anchorage Assembly member wants to ban the city from using of facial recognition technology, Kodiak Island Boroughs mayor becomes its city manager. The movement doesnt mean an eruption will happen soon or even at all from Southeast Alaskas most prominent volcano, but its significant enough that the observatory has raised the volcanos threat level. This is happening about 1 week after a M8.2 earthquake shook wide parts of Alaska on July 28, 2021. The reports were later confirmed by webcam. Meanwhile, Pavlof Volcano on the Alaska Peninsula is also producing ash clouds. There were 73 confirmed eruptions at some point during 2020 from 68 different volcanoes; 27 of those were new eruptions that started during the year. The summit of roughly 65,000-year-old Stary Shiveluch is truncated by a broad 9-km-wide late-Pleistocene . The most recent significant period of eruption began in February 2001 and produced 3 explosive events that generated ash clouds as high as 39,000 ft (11.8 km) above sea level. The most active volcano of the Aleutian arc, Pavlof is a 2519-m-high Holocene stratovolcano that was constructed along a line of vents extending NE from the Emmons Lake caldera. A series of eruptions about 14,000 years ago spread volcanic ash across Southeast Alaska thatmay have helped melt the glaciersthat covered the region at the time. AVO monitors Aniakchak with a local network, which consists of six seismometers, a web camera, and a single infrasound sensor, as well as satellite remote sensing data and regional infrasound and lightning networks. To a geologist, erupting 4,000 years ago is pretty recent, you know? Coombs said. In Wasilla, Willoya at first thought the sound couldve been caused by her tea kettle. Mount St. Helens, Washington Mount St. Helens, Washington. A four-foot tsunami wave was reported to. In an October paper published in the journal Geophysical Research Letters, scientist Ronni Grapenthin noted that the ground on the east side of the volcano was bulging outward at a rate faster than any other volcano in Alaska. It is located 40 mi (65 km) northeast of Amchitka Island and 130 mi (200 km) west of Adak. WILDFIRES TAKE TOLL ON TROPICAL PACIFIC ISLANDS. The Alaska Volcano Observatory is planning to install a series of seismic instruments on Mount Edgecumbe near Sitka after preliminary measurements showed magma moving deep below the Mount Fuji-shaped volcano. The volcano's eruption was dramatic, sending plumes of gas and ash thousands of feet into the atmosphere, though early reports of damage were limited. Aerosols from volcanic plumes confined to the troposphere are washed out by precipitation in a matter of weeks, making their climatic impacts relatively minor and much more localized. Novarupta spewed 13 cubic kilometers (3.1 cubic miles) of magma, which turned into 30 cubic kilometers (7.2 cu mi) of ash that blanketed the nearby area. The audible sounds from the eruption lasted for about 30 minutes while the low frequency sounds lasted longer, around 2 hours. They described what they heard and their initial impressions of what was causing the sound: military cannons, fireworks, routine blasting for avalanches, target practice, home intruders, slamming doors, violent winds, kids jumping up and down. "This lava fountain is kind of unusual for Great Sitkin, but its been fairly passive at this point," said Chris Waythomas, a geologist with the Alaska Volcano Observatory. All rights reserved. Crustal seismicity in this region can be attributed to the Kodiak Shelf Fault Zone and to the volcanic arc. It is located 26 mi (43 km) east of the community of Adak. Mount Edgecumbe has been inactive for at least 800 years but, following a spate of earthquakes in the area earlier this year, scientists have identified new signs that the sleeping giant may be waking up. The eruption lasted for 24 hours and destroyed most life on the island. Seismicity remains above background levels and is characterized by weak, low-frequency earthquakes. On 7 August 2008, Kasatochi began erupting explosively with an ash plume reaching 45,000 feet. [Sign up for Alaska Public Medias daily newsletter to get our top stories delivered to your inbox.]. We still think the magma is very deep. 3 Alaska volcanoes erupt, spitting lava and ash clouds, just days after a massive M8.2 earthquake Aug 6, 2021 1 Three remote Alaska volcanoes are in various states of eruption, one producing lava and the other two blowing steam and ash. The fact that the explosion happened beneath the sea likely contributed to the explosiveness, but not how far the sounds traveled, Fee said. Itll take further research to say for sure what was different about this eruption. Willoya, who had set an early alarm to check for northern lights activity, had no idea what she was hearing. We expect additional shallow seismicity and other signs of unrest, such as gas emissions, elevated surface temperatures, and surface deformation to precede any future eruption, if one were to occur. published in the journal Geophysical Research Letters, scientist Ronni Grapenthin noted that the ground on the east side of the volcano was bulging outward at a rate faster than any other volcano in Alaska. "'Dormant' is a word that is often used to describe volcanoes that haven't erupted for decades or centuries, and perhaps look completely quiet. ANCHORAGE, Alaska (KTUU) - The ash from Russia's Sheveluch Volcano, which erupted early Saturday morning sending ash as high as 32,000 feet into the atmosphere, has completed its journey over the northern and eastern skies of Alaska. A small swarm of earthquakes occurred 6 km (4 mi) east of the summit and at depths less than 6 km (4 mi) on Monday and Tuesday, including earthquakes with magnitudes of 2.3 and 1.5. Eruptive activity continued this week at the active north crater of Mount Cerberus, now known as Mount Young. So yeah, this is pretty unique, he said. It definitely has moved up, said Cheryl Cameron, a state geologist who works at the volcano observatory. The last activity on the lava lake surface was observed on May 23 and on May 26, 2021, the USGS Hawaiian Volcano Observatory lowered the Volcano Alert Level for ground-based hazards from WATCH to ADVISORY and the Aviation Color Code from ORANGE to YELLOW. I guess I trust the science on it, Kluting said. So far, none of the small communities near the volcanoes have been affected, Chris Waythomas, a geologist with the Alaska Volcano Observatory, said Thursday. a series of M7+ earthquakes was associated . The Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys. Great Sitkin Volcano is a basaltic andesite volcano that occupies most of the northern half of Great Sitkin Island, a member of the Andreanof Islands group in the central Aleutian Islands. Despite the current pause, the eruptive period at Cleveland, dating back to 2001, remains ongoing and future explosions are likely. According to the U.S . All rights reserved. AVO monitors Trident Volcano with a local network of seismometers, a webcam, remote sensing data, and regional infrasound and lightning networks. Additional ash-producing events could occur again with little warning. Increases in seismic activity have been detected previously atTridentVolcano and other similar volcanoes, with no subsequent eruptions. We expect additional shallow seismicity and other signs of unrest, such as gas emissions, elevated surface temperatures, and surface deformation to precede any future eruption, if one were to occur. A tsunami advisory was issued for parts of the U.S. Pacific coast Saturday morning after an undersea volcano erupted in spectacular fashion near Tonga. SUBSCRIBE TO THE PARTING SHOT WITH H. ALAN SCOTT near the volcano, and satellite radar measurements show the ground around the volcano bulging upward. This lava fountain is kind of unusual for Great Sitkin, but its been fairly passive at this point, he said. December 2020 - May 2021 Eruption | U.S. Geological Survey Skip to main content The Hunga Tonga-Hunga Ha'apai volcano erupts again at 5.10pm local time on Saturday 15 January. If it does erupt, we expect a lot more activity before that happens, said Michelle Coombs, a USGS geologist and scientist-in-charge at the Alaska Volcano Observatory. This material may not be published, broadcast, rewritten, or redistributed. Volcanic activity reported here is preliminary and subject to change. Pavlof and its twin volcano to the NE, 2142-m-high Pavlof Sister, form a dramatic pair of symmetrical, glacier-covered stratovolcanoes that tower above Pavlof and Volcano bays. Nothing significant was observed in satellite data this week, including some mostly clear and partly cloudy views. If the gas bubbling through the lakes is magmatic, she said, itll be another sign of activity at the volcano. The latest of the trio of supervolcano eruptions created the park's huge crater, measuring 30 by 45 miles across (48 by 72 kilometers). ALASKA VOLCANO OBSERVATORY DAILY UPDATE The Alaska Beacon is an independent, nonpartisan news organization focused on connecting Alaskans to their state government. The US and Japan have advised people on their Pacific coastlines to get away from the shore as a precaution against tsunami waves caused by a volcano eruption in the South Pacific. Anew information update, released Friday, shows the earthquakes have continued, hikers have observedgas bubbling from the groundnear the volcano, and satellite radar measurements show the ground around the volcano bulging upward. Increases in seismic activity have been detected previously at other similar volcanoes, with no subsequent eruptions. There were just a few other times Fee could think of when audible sound traveled so far and wide, including the Novarupta Katmai eruption of 1912, the largest eruption of the 20th century, and the 1883 Krakatoa eruption. One Alaskan said by email that what they heard was how I imagined world war 3 would sound like.. Contact Editor Andrew Kitchenman for questions: info@alaskabeacon.com. You've successfully subscribed to this newsletter! A steep-sided lava dome, emplaced during the most recent significant eruption in 1974, occupies the center of the crater. She warned pilots to use caution when flying nearby and to follow the observatorys advisories, but added that the eruptions dont pose any significant threat to people.. The pressure wave from the Hunga Tonga-Hunga Ha'apai eruption arrived here in Anchorage at 3:30 a.m. AKST. Partially because of their experience, Kluting and Turley have been following events more closely than most. Mount. The 2001 eruption also produced a lava flow and hot avalanche that reached the sea. The Alaska Volcano Observatory (AVO) is a joint program of the U.S. Geological Survey (USGS), the Geophysical Institute of the University of Alaska Fairbanks (UAFGI), and the State of Alaska Division of Geological and Geophysical Surveys (ADGGS). . ALASKA VOLCANO OBSERVATORY DAILY UPDATE U.S. Geological Survey Tuesday, February 28, 2023, 1:05 PM AKST (Tuesday, February 28, 2023, 22:05 UTC) GREAT SITKIN (VNUM #311120) 524'35" N 1766'39" W, Summit Elevation 5709 ft (1740 m) Current Volcano Alert Level: WATCH Current Aviation Color Code: ORANGE A 6.9 earthquake struck off the coast of the Alaskan Peninsula early Saturday morning, the U.S. Geological Survey reported. We were inside and we heard something, kind of like a low rumbling. That means it travelled at 830 mph (1,340 kmh). The eruption of Novarupta on June 6 - 8, 1912 was the largest volcanic eruption in recent history in the United States. . The Hunga Tonga-Hunga Ha'apai volcanic eruption was heard here in Alaska starting around 3:30 a.m. - 6,000 miles from the volcano! about 150 years ago. The mission of the USGS Volcano Hazards Program is to enhance public safety and minimize social and economic disruption from volcanic unrest and eruption. Cleveland volcano forms the western portion of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. The current period of seismic unrest began in October 2022. Risk isnt just the likelihood of an eruption, Coombs said. Our stories may be republished online or in print under Creative Commons licence CC BY-NC-ND 4.0. This material may not be published, broadcast, rewritten, It might not erupt. The view is from Mutton Cove on southwest Unalaska Island about 67 kilometers southeast of the. Follow Alaska Beacon on Facebook and Twitter. So this is unusually busy, Dietterich said, but all of these volcanoes have erupted in recent years as well.. Parts of Takawangha's edifice are hydrothermally altered and may be unstable, possibly leading to localized debris avalanches from its flanks. They said theyre not concerned by the volcanos movement or the distant prospect of an eruption. It definitely has moved up, said Cheryl Cameron, a state geologist who works at the volcano observatory. . All rights reserved. An undersea volcano erupted in spectacular fashion near the Pacific nation of Tonga on Saturday, sending large waves crashing across the shore and people rushing to higher ground. The volcano is located about 45 miles (75 km) west of the community of Nikolski, and 940 miles (1500 km) southwest of Anchorage. Elevated surface temperatures and sulfur dioxide emissions had prompted AVO to raise the Aviation Color Code and Volcano Alert Level from UNASSIGNED/UNASSIGNED to YELLOW/ADVISORY on May 11, 2022. The most recent eruption in Canada took place at Lava Fork in northwestern B.C. Meanwhile, the Great Sitkin Volcano has a confirmed lava fountain at its summit, which people in the nearby community of Adak can see. However, it had been hundreds of years since the last eruption on the Reykjanes Peninsula near Reyjavk. The 1- to 2-minute explosion of Great Sitkin volcano began just after 9 p.m., according to an activity. Contact Editor Andrew Kitchenman for questions: info@alaskabeacon.com. The island is uninhabited and part of the Alaska Maritime National Wildlife Refuge. In this case, it would have taken the audible sound waves about seven hours after the explosion to be heard in Alaska, according to Fee. Ash clouds were rising just above the volcanos 8,261-foot summit, drifting about 6 miles to the south before dissipating, Waythomas said. . A veteran of AmeriCorps and Vista volunteer programs, she's previously reported for Mission Local and KQED in the Bay Area. Hes a research professor who works at the Geophysical Institute at the University of Alaska Fairbanks and as a scientist with the Alaska Volcano Observatory. Infrasound measurements from the @alaska_avo confirm that it was . After talking with Cheryl and crew, I think that the monitoring works. I have certainly heard from people that are very concerned and feel like theyre scared. A graduate of Virginia Tech, he is married to Caitlyn Ellis, owns a house in Juneau and has a small sled dog named Barley. The ongoing earthquake swarm near Takawangha volcano continued over the past week, although seismic data from the local network experienced an outage over the past day which was resolved this morning. The volcano is dominated by a 5-mile (8 km) diameter caldera that contains a small lake and several post-caldera cones and craters. Mount Edgecumbe is now considered a high risk volcano, one step below the states very high risk volcanoes: Augustine, Spurr, Redoubt, Akutan and Makushin. The ongoing earthquake swarm at Takawangha volcano escalated and subsequently declined over the past day. Friday, January 6, 2023, 12:40 PM AKST (Friday, January 6, 2023, 21:40 UTC). Early data suggests the volcanic . Never in my life would I have thought it was a volcano from the South Pacific, Willoya said. Contact Editor Andrew Kitchenman for questions: info@alaskabeacon.com. Low-level volcanic tremor was detected in seismic data over the past day. Japan has . The volcano is about 4.4 mi (7 km) in diameter and currently has an active vent on the east side close to the summit. ", As magma pushes its way up towards the surface, it also causes the earth above it to bulge, like a stretching balloon. After talking with Cheryl and crew, I think that the monitoring works. Ash plumes as high as 49,000 ft (15 km) above sea level have been generated by past eruptions of Pavlof, and during the March 2016 eruption, ash plumes as high as 40,000 ft (12.2 km) above sea level were generated and the ash was tracked in satellite data as distant as eastern Canada. No eruptive activity was observed over the past week and no explosions have been detected since December 7, 2022. 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