[ Skywatchers ] [ Main Menu ]
47404
From: Earthstone, [DNS_Address]
Subject: Geomagnetic Sudden Impulse
|
From solarham.net : "UPDATE: The anticipated CME swept past Earth at 17:37 UTC. The arrival also pushed proton levels above the minor (S1) radiation storm threshold. With the solar wind now near 550 km/s and the Bz component sharply south (-23nT), moderate (G2) to strong (G3) storm conditions will be possible. Aurora sky watchers should be alert once dark outside. SUMMARY: Geomagnetic Sudden Impulse Observed: 2023 Apr 23 1737 UTC Deviation: 48 nT https://www.solarham.net/ https://www.swpc.noaa.gov/ Station: BOU" |
47405
From: Eve, [DNS_Address]
Subject: Re: Geomagnetic Sudden Impulse
|
I noticed the proton levels beginning to increase..they have gone up a few notches since I checked a few hours ago. |
47409
From: Eve, [DNS_Address]
Subject: Re: Geomagnetic Sudden Impulse (severe geo storm in progress)
|
SEVERE GEOMAGNETIC STORM IN PROGRESS: Arriving earlier than expected, a CME hit Earth's magnetic field today, April 23rd, at 1737 UT. The impact sparked a severe G4-class geomagnetic storm with auroras sighted in Europe sighted as far south as France. The storm is still going on and it is starting to produce visible auroras in the USA as well. Here is a picture from Kentucky! Stay tuned for more auroras as night falls across North America. |
47411
From: ryan, [DNS_Address]
Subject: Re: Geomagnetic Sudden Impulse (severe geo storm in progress)
URL: https://www.sfgate.com/weather/article/northern-lights-dazzle-california-skywatchers-17914957.php
|
'It just blew up': Northern lights wow sky watchers in California Aurora Borealis seen in Owens Peak Wilderness on April 23, 2023 Courtesy of Alice Hwang Amy Graff, SFGATE April 24, 2023 Just before 9 p.m. on Sunday, the sky over California’s northern Sierra foothills glowed cotton-candy pink — “And then, five minutes later, it just blew up,” said Donovan Johnson, who was dazzled by last night’s rare showing of the northern lights over California. Capturing the burst of colors with his Canon digital camera, Johnson was amazed that he could see the aurora borealis from his backyard in the town of Auburn, about 30 miles northeast of Sacramento. “It only lasted for 15 minutes and then the colors faded away,” Johnson, who is an amateur nature photographer, told SFGATE over the phone. “It was my first time seeing them too, so it was kind of crazy that it was in California.” Some edited shots from my camera. What a night. I would've never thought my first aurora sighting would be in California #cawx #northernlights #aurora #springwx pic.twitter.com/8Xm3tOthXy — Donovan Johnson (@Donovan_J19) April 24, 2023 On Sunday night, streaks of color wowed sky watchers in California for the second time in a month, with sightings reported everywhere from the Sacramento Valley to Sonoma County to Mammoth Mountain. The shimmery display previously appeared less widely, primarily in the most northern part of the state, on March 24. The northern lights usually appear in the Earth’s most remote northern latitudes, such as in parts of Alaska, Canada and Iceland, according to the National Oceanic and Atmospheric Administration. Sunday night into Monday morning, they lit up the sky over lower latitudes than usual across the world due to a severe geomagnetic storm, a level 4 out of five on NOAA’s scale. In the U.S., they occurred as far south as North Carolina, Oklahoma, California and even Arizona, said Clinton Wallace, director of NOAA’s Space Weather Prediction Center. Geomagnetic storms drive the northern lights. These happen when the sun expels plasma, or charged particles, into the solar winds that interact with the particles trapped by the Earth’s magnetic field. The recent storm was triggered by a solar flare, or explosion, on the sun Friday afternoon, and NOAA forecast that the aurora would appear as far south as California, said Wallace. “The flare ejected a billion tons of superheated magnetized gas into space that traveled at 2 million mph toward Earth,” he explained. “In two days, this plasma that’s magnetized reached Earth, which essentially is a big magnet as well.” When the two magnetic fields collide, they create a geomagnetic storm. In this instance, the connection was strong, and Wallace said the storm created some of the biggest disturbances NOAA has recorded in the Earth’s magnetic field in six years. “A storm of this magnitude is very unusual,” he said. There were fluctuations in the power grid, but the effects were manageable, Wallace noted. Eric Eisner and Alice Hwang, high school teachers from Santa Monica, knew they were seeing something special when they observed the aurora Sunday while camping in a remote part of the Owens Peak Wilderness about 100 miles northeast of Bakersfield. “It’s the kind of thing where you wake up in the morning and you’re like, ‘Oh that must have been a dream,’ but you realize it was real,” Eisner said. The couple, who runs the Artistic Off-Road YouTube channel to inspire people to go outdoors, caught the spectacle by chance. Eisner randomly checked the NOAA site at 8:45 p.m. and was surprised to see an “intense geomagnetic storm” in the forecast. Eisner decided to stay up to see if anything would happen, while Hwang went to bed. Fifteen minutes later, the sky slowly started lighting up. At first, Eisner didn’t think it was the northern lights, as it seemed too unlikely to see the aurora this far south on the eastern base of the southern Sierra Nevada. He checked the map to see if there was a town nearby giving off light and realized that there were only mountains around him. “And then the sky got brighter and I woke up Alice,” he said. “The show lasted about 20 minutes all together, and the burst in intensity for about 5 minutes, with these beams of white light coming down from the sky,” Eisner said. Hwang summed up the experience simply: “It was surreal.” |
Responses:
None
47410
From: Earthstone, [DNS_Address]
Subject: Re: Geomagnetic Sudden Impulse (severe geo storm in progress)
| We had full cloud cover. Maybe next time :D |
Responses:
None
[ Skywatchers ] [ Main Menu ]