Anchorage, Alaska – Volcanoes near Alaska’s biggest city show new signs of anxiety. Experts say the likelihood of an eruption in Mount Spall is increasing in the coming weeks or months.
The Alaska Volcanic Observatory said Wednesday it measured “a significant rise in volcanic gas emissions” during recent turbulence, with the signs indicating that the eruption was not certain in weeks or months, but not certain.
“We hope for more seismic activity, gas emissions and surface heating before the eruption. “Such strong anxiety could provide additional warnings for days to weeks.”
What is Mount Spur?
It is an ice-covered volcano about 80 miles northwest of Anchorage, 11,070 feet high.
Mount Spur is one of Alaska’s 53 volcanoes and has been active within the last 250 years. There are two main vents.
When did Mount Spur last erupt?
The last known eruption from the Summit Bent was over 5,000 years ago. Meanwhile, Crater Peak Vent erupted once in 1953 and three times in 1992. Crater Peak Vent is about two miles south of the summit.
Since then, there have been periods of increasing earthquakes and other activities between 2004 and 2006, but no other eruptions. Last October, the observatory raised the green to yellow mount spur alert status when seismic activity increased significantly and ground deformation was discovered in satellite data.
The most likely outcome of current anxiety would be the eruptions or eruptions of 1953 and 1992, the observation deck said.
But “there is a possibility that there will be no eruptions, current activity will die slowly, or even smaller eruptions may occur,” wrote John Power, a geophysicist at the station’s US Geological Survey, in an email.
What are the effects of the eruption?
According to the observation deck, eruptions of the last century lasted three to seven hours, rising more than 50,000 feet above sea level, producing ash columns deposited ashes in communities in southern Alaska.
In 1992, about a quarter inch of ash from the anchorage began to stay inside or wear masks if they were to go outside to avoid breathing the ashes. The clouds drifted all the way to Greenland.
Volcanic ash is angular and sharp, and is used as an industrial abrasive. Powdered rocks can shut down the jet engine.
The 1992 eruption prompted temporary closures of airports in Anchorage and other communities.
In states where most communities are not connected to Alaska’s main road system, closing airports is more than inconvenient. Ted Stevens Anchorage International Airport is one of the busiest cargo hubs in the world.
Source: www.nbcnews.com
