The storm that took over the Alaskan skies last night was pretty impressive. The entire sky lit up to the point that the snow on the ground glowed green.
I heard that last night’s magnetic storm was rated a Kp7. The Kp index rates the magnitude of a geomagnetic disturbance. A 0, 1 or 2 is considered “Quiet”. A Kp3 is “Unsettled”. Kp4 = “Active”. Kp5 is a “Minor Storm” G1. Kp6 is a “Moderate Storm” G2, while last night’s Kp7 is considered a “Strong Storm” G3. Kp8 and Kp9 top the index as “Severe Storm” G4 and “Extreme Storm” G5, respectively.
There are some really incredible images out there online from last night’s Strong Storm. The two here are only cell phone images, and they do not do the aurora justice. It was really a phenomenal show. As you can see, we were not limited to just the green northern lights, but quite a bit of red was visible to the naked eye.
The skies were crystal clear, as expected, with temps dipping down to -32F at the cabin. I can’t wait to see if we get a second round tonight.
There was a somewhat unexpected traveler through downtown Fairbanks on Wednesday. A wolf was spotted alongside a major road in town. Wolves tend to not seek the social media limelight, so they are not often spotted in town. I have seen them outside of town on several occasions over the years, but never anywhere near town.
That said, the wolf was the talk of the town all day, although I was late to the party with my limited social media presence. Fish & Game officials believe the wolf came down the Chena River and took a sight seeing tour of the town. They were keeping tabs on the wolf’s whereabouts, but remaining mum.
Alaska Native civil rights icon Elizabeth Peratrovich
Today Alaska celebrates the life and dedication of Elizabeth Peratrovich.
In 1945, the Anti-Discrimination Act came before the Alaska Territorial Senate. The bill had already passed the House, and Peratrovich was slated to testify on the bill’s behalf. The State Legislative Building was packed to the rafters, and the doors were left open so that those in the hallways could hear the proceedings.
A Juneau senator cemented his place in Alaska history with this question: “Who are these people, barely out of savagery, who want to associate with us whites, with 5,000 years of recorded civilization behind us?”
When Elizabeth Peratrovich testified, she responded with, “I would not have expected that I, who am barely out of savagery, would have to remind gentlemen with five thousand years of recorded civilization behind them, of our Bill of Rights.” She went on a passionate plea calling for equal treatment for Indigenous peoples in the state.
The bill passed the Senate 11-5 and was signed by Governor Gruening on February 16, 1945. Alaska was still a territory, and its Anti-Discrimination Act passed almost 20 years before the United States passed the Civil Rights Act.
An automatic weather balloon launcher, near Fairbanks
I’ve been out at Poker Flats, which is outside Fairbanks, on several occasions when they were launching weather balloons. These days, most weather balloons are filled and launched by robotic launchers called autosondes, which takes some of the romance out of weather balloons, but that’s not the purpose of this post.
In the United States alone, there are 92 sites that launch two balloons every day of the year. There are over 800 locations worldwide doing the exact same thing. Here in Alaska, we have 13 sites that launch weather balloons twice a day, every day, and always at the same time: Midnight and noon Greenwich Mean Time.
A small collection of weather instruments, called a radiosonde is attached to the balloon which collects data and transmits that data back to the NWS as it rises. A weather balloon makes it to roughly 100,000 feet before it pops and falls back to earth. These days, radio balloons are highly biodegradable.
The first weather balloon with a radiosonde launched from Fairbanks in 1933. They started launching two balloons a day in 1941. I’ll let you do the math, but no matter how you figure it, that’s a lot of balloons.
Ice core records from the Arctic show that Alaska’s Okmok Volcano had a massive eruption in 43 BCE. Following the eruption, there was an abrupt cooling globally, which led to crop failures, famine, disease, and eventually, social unrest. The Mediterranean region was no exception to this.
Such a shift in climate, coming a year after the assassination of Caesar, would have put great pressure on local powers. Strain was also felt in Egypt.
Okmok has a very active history. At one time, it had a 150 meter deep lake in its crater. A notch in the rim eventually drained the lake, although some small remnant lakes remain near cones B & D.
The eruptions of Okmok 8300 and 2050 years ago earn a Volcanic Explosivity Index rating of 6, which puts it on par with Novarupta and Krakatoa.
On 12 July 2008, Okmok erupted without warning, sending ash 50,000 feet into the air. It erupted continuously for almost six full days, causing transportation problems in the air and on the water for the region. That eruption was ranked a 4 VEI, which is considered “cataclysmic”.
Okmok Volcano; Photo credit: AVO/Burke Mees
Back to 43 BCE. The decade following the eruption was one of the coldest in a millennia, with 43 and 42 BCE being some of the coldest years. It is believed that a temperature drop of 7C from normal was a result of the volcanic eruption on the other side of the globe.
There is a cluster of volcanic islands in the Aleutian Chain that scientists have recently been asking a rather provocative question: Could they all be a part of one giant super volcano, similar to the Yellowstone Caldera?
This tight grouping of islands is home to six stratovolcanoes: Carlisle, Cleveland, Herbert, Kagamil, Tana and Uliaga. Mount Cleveland has been one of the most active volcanoes in North America over the past 20 years.
Most stratovolcanoes tend to have modest sized reservoirs of magma. Although that doesn’t mean they can’t have explosive eruptions, but they are dwarfed by caldera forming eruptions. A caldera is formed by tapping a huge reservoir of magma in the earth’s crust. A caldera forming eruption releases a massive amount of lava and ash, and they are catastrophic, often causing world-wide effects.*
Field work continues, although there is nothing easy about doing research in the Aleutians.
Mount Cleveland
Photo and map credit: USGS, *University of Alaska – Fairbanks
It’s the tail end of Volcano Week with the National Park Service. The above photo, of Mount Wrangell, was taken in 1902 by W.C. Mendenhall, of the U. S. Geological Survey. The namesake of Mendenhall Glacier.
Mount Wrangell is a andesitic shield volcano within Wrangell-St Elias National Park. Its last eruption was in 1930, but it has been actively steaming for over 100 years.
A test delivery van, followed by another EV riding shotgun
We often see test vehicles roaming our roads in the winter, although these stood out more than most. The first time I saw them, there was an entire convoy in line, but since then it’s been mostly in small groups.
Amazon is in Fairbanks testing their new EV delivery vans. This is probably not the winter to give an EV a thorough cold weather test, as it has been one of the milder winters I have experienced. Still, Amazon is having a go at it, and it should be a good test for how they handle on icy roads.
If you rear end one of these vans, you are spending way too much time on your cell phone.
