ニューヨークで昨夜、大規模でオーロラが見えたのに、
ニュースを知らなくて見逃した。
今夜、再び、最後のチャンスとしてもしかしたら見えるかも。
というニュースをUSA の政府のサイトで見つけた。
待機してみよう。今夜は。 笑。
NYTimes によると、、、
大したことなさそう。
The Northern Lights May Be Visible Again on Saturday Night
The strong geomagnetic storm will last until at least Monday.
The strongest geomagnetic storm in more than 20 years hit the earth on Friday. The G5 storm, which followed a series of large solar flares and coronal mass ejections in recent days, weakened but continued Saturday. The good news is the storm has given much of the U.S. a rare opportunity to view the northern lights (aurora borealis) — the second rare sun-related event in the U.S. this spring, following the awesome total solar eclipse last month. Below is a quick look at the storm, it’s impact, and what to expect for the rest of the weekend.
Though the storm isn’t as strong as it was overnight Friday, when countless people were able to see the northern lights as far south as Mexico, it’s not over yet. The aurora borealis might once again be visible on Saturday night from a lot of places in the U.S., provided there are clear skies (or breaks in the cloud cover), and not too much light pollution (like from near or inside a metropolis). Per the NOAA Space Weather Prediction Center’s latest alert at 5:16 p.m. ET, the geomagnetic storm is currently rated a moderate G2, which means “aurora may be seen as low as New York to Wisconsin to Washington state.”
In some locations, the colors may appear very faint to the naked eye, but show up better through your smartphone camera. When it is visible to the naked eye, the shifts and movement of the bands of color can be slow and subtle. And depending on where you are, you will also need to know where in the sky to look — the further south you are, it may only appear as a colored band on, or a little above the northern horizon.
Explains the Washington Post:
Activity was exceptionally strong Friday night to Saturday morning Eastern time, hitting a severity Level of 5 out of 5. Current NOAA models show geomagnetic activity will be slightly less intense Saturday night, potentially registering a 3 out of 5. This means the aurora could be seen as far south as Oregon, Illinois and Pennsylvania.
The aurora will tend to be most vibrant in northern areas and will becoming more faint to the south — in some places only visible through cameras. “Cellphones are much better than our eyes at capturing light,” Brent Gordon, chief of NOAA’s Space Weather Services Branch, said in a news conference Friday. “Just go out your back door and take a picture with a newer cellphone, and you’d be amazed at what you see in that picture versus what you see with your eyes.”
No matter what, the storm won’t be strong enough overnight Saturday to bring back the the widespread aurora everyone saw on Friday night.
Space Weather Message Code: ALTK06 Serial Number: 565 Issue Time: 2024 May 11 1831 UTC ALERT: Geomagnetic K-index of 6 Threshold Reached: 2024 May 11 1828 UTC Synoptic Period: 1800-2100 UTC Active Warning: Yes NOAA Scale: G2 - Moderate NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.