The Bogoslof volcano, located along Alaska's Aleutian Islands, erupted, leaving a small amount of ash on the city of Unalaska on the Aleutian Islands.
The volcano, located on an island about 60 miles west of Unalaska, has been intermittently active since mid-December, the Alaska Dispatch News reported. Last week, an eruption sent an ash cloud over Unalaska, hampering travel.
"Bogoslof volcano is in an active eruption sequence that began on Dec. 12, 2016," the Alaska Volcano Observatory wrote on its website Tuesday. "Until recently, eruptive activity detected by remote monitoring instruments, in satellite data, and from pilot reports had been dominated by a series of short-duration (minutes to tens of minutes) explosive events.
"There were about 27 such events, occurring every one to four days. The resulting volcanic clouds rose to altitudes of 20,000 to 35,000 feet above sea level, and were typically discernible in satellite images for hours afterwards," the statement continued.
The observatory said there has been "significant changes" to Bogoslof Island since the explosions, according to satellite images. Freshly erupted volcanic rock and ash have formed a barrier that separates the vent from the sea for the first time since the eruptive sequence began.
Kristi Wallace, a geologist at the Alaska Volcano Observatory, told the Dispatch News that local residents had started sending her photos of the ashfall. Some of those photos were also shared on Twitter.
"I would not describe it as a continuous layer, so when it falls on snow you can see the snow in between and when it falls on cars it appears as droplets," Wallace said, per the Dispatch News. "I don't think what they got is anything anyone could take out a ruler and measure."
KUCB Public Broadcasting reported last week that PenAir canceled 17 flights from Anchorage to the Unalaska, 10 due to poor weather or to the volcano eruptions. The airline told KUCB that it added two extra flights last Friday to transport 90 people on its standby list to Unalaska.
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