ANCHORAGE, Alaska: A volcano near Alaska’s largest city is showing new signs of unrest, with experts saying the likelihood of an eruption at Mount Spurr in the next few weeks or months has increased.
The Alaska Volcano Observatory said Wednesday that it had measured during recent overflights “significantly elevated volcanic gas emissions,” and said signs indicated an eruption was likely, though not certain, in the weeks or months ahead.
“We expect to see further increases in seismic activity, gas emissions and surface heating prior to an eruption, if one were to occur,” the observatory said in a statement. “Such stronger unrest may provide days to weeks of additional warning.”
What is Mount Spurr?
It is an 11,070-foot (3,374-meter) tall, ice- and snow-covered volcano roughly 80 miles (129 kilometers) northwest of Anchorage.
Mount Spurr is one of 53 volcanoes in Alaska that have been active within the last 250 years. It has two main vents.
When did Mount Spurr last erupt?
The last known eruption from the summit vent was more than 5,000 years ago. The Crater Peak vent, meanwhile, erupted once in 1953 and three times in 1992, according to the observatory. The Crater Peak vent is about 2 miles (3 kilometers) south of the summit.
There have been periods of increased earthquake or other activity since then, including between 2004 and 2006, but no other eruptions. Last October, the observatory raised its alert status for Mount Spurr from green to yellow when an increase in seismic activity became pronounced and a ground deformation was spotted in satellite data.
The most likely outcome of the current unrest would be an eruption or eruptions similar to those in 1953 and 1992, the observatory said.
However, “It is also possible that no eruption occurs and the present activity slowly dies away or that a smaller eruption takes place,” John Power, a geophysicist with the US Geological Survey at the observatory, wrote in an email.
What impacts could an eruption have?
The eruptions during the last century lasted between three and seven hours, produced ash columns that rose more than 50,000 feet (15,240 meters) above sea level and deposited ashfall in south-central Alaska communities, according to the observatory.
In 1992, ashfall of about a quarter-inch in Anchorage prompted residents to stay inside or to wear masks if going outside to avoid breathing ash. The cloud drifted as far as Greenland.
Volcanic ash is angular and sharp and has been used as an industrial abrasive. The powdered rock can cause a jet engine to shut down.
The 1992 eruptions prompted the temporary closures of airports in Anchorage and other communities.
Closing airports can be more than an inconvenience in a state where most communities aren’t connected to Alaska’s main road system. Ted Stevens Anchorage International Airport also is among the world’s busiest cargo hubs.
A volcano near Alaska’s largest city could erupt in the coming weeks or months, scientists say
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A volcano near Alaska’s largest city could erupt in the coming weeks or months, scientists say
- The Alaska Volcano Observatory said Wednesday that it had measured during recent overflights “significantly elevated volcanic gas emissions”
Most of Iranian women’s soccer team leave Australia
GOLD COAST: The Iranian women’s soccer team left Australia without seven squad members after tearful protests of their departure outside Sydney Airport and frantic final efforts inside the terminal by Australian officials, who sought to ensure the women understood they were being offered asylum.
As the team’s flight time drew nearer and they passed through security late on Tuesday, each woman was taken aside to meet alone with officials who explained through interpreters that they could choose not to return to Iran.
Before the team traveled to the airport, seven women had accepted humanitarian visas allowing them to remain permanently in Australia and were ushered to a safe location by Australian police officers.
One has since changed her mind, underscoring the tense and precarious nature of their decisions.
“In Australia, people are able to change their mind,” said Australian Home Affairs Minister Tony Burke, who had hours earlier posted photos of the seven women granted humanitarian visas to his social media accounts, their identities clearly visible.
After what Burke described as “emotional” meetings between the remaining women who reached the airport and Australian officials, the rest of the team declined offers of asylum and boarded their flight.
It was a dramatic conclusion to an episode that had gripped Australia since the Iranian team’s first game at the Asian Cup soccer tournament, when they remained silent during their national anthem.
