Post by johnm on May 21, 2020 16:34:45 GMT
The first NLC of the 2020 season has been discovered by NASA's AIM satellite see Space Weather.com 21st May 2020
It's not explained what the vertical coloured dashed lines on the Temperature & Moisture plots mean but I am guessing that they show the first date AIM spotted NLC in the Northern Hemisphere based on the Red Line for 2020 and the earliest line which appears to be for 2013 which ties up with the text for the year with the earliest sighting.
Expect the amount of NLC to develop rapidly over the next 10 days or so and start observing night and morning.
John Murrell FRAS
It's not explained what the vertical coloured dashed lines on the Temperature & Moisture plots mean but I am guessing that they show the first date AIM spotted NLC in the Northern Hemisphere based on the Red Line for 2020 and the earliest line which appears to be for 2013 which ties up with the text for the year with the earliest sighting.
Expect the amount of NLC to develop rapidly over the next 10 days or so and start observing night and morning.
John Murrell FRAS
