· ·

Severe geomagnetic storm subsiding

subsiding-geomagnetic-storm-4

A severe geomagnetic storm (Kp=7 to 8) that began yesterday when a CME hit Earth's magnetic field is subsiding.

At the peak of the disturbance, auroras were sighted around both poles and in more than six US states including MichiganNew YorkSouth DakotaMaineMassachusetts and Minnesota. Sky watchers at the highest latitudes should remain alert for auroras as Earth's magnetic field continues to reverberate from the CME impact.

Solar wind
speed: 539.7 km/sec
density: 0.1 protons/cm3

The Radio Sun
10.7 cm flux: 148 sfu

Planetary K-index
Now: Kp= 2 quiet
24-hr max: Kp= 7 strong

Interplanetary Mag. Field
Btotal7.9 nT
Bz3.6 nT north 

The source of all this solar and geomagnetic activity is sunspot AR1302. Measuring more than 150,000 km from end to end, the sprawling active region is visible even without a solar telescope. 

 

The sunspot has quieted down since unleashing dual X-flares on September 22nd and 24th. Nevertheless, NOAA forecasters estimate a 40% chance of more X-flares during the next 24 hours. Any such eruptions would be Earth-directed as the sunspot crosses the center of the solar disk. (SpaceWeather)

Featured image credit: SpaceWeather

If you value what we do here, create your ad-free account and support our journalism.

Share:

Related articles

Producing content you read on this website takes a lot of time, effort, and hard work. If you value what we do here, select the level of your support and register your account.

Your support makes this project fully self-sustainable and keeps us independent and focused on the content we love to create and share.

All our supporters can browse the website without ads, allowing much faster speeds and a clean interface. Your comments will be instantly approved and you’ll have a direct line of communication with us from within your account dashboard. You can suggest new features and apps and you’ll be able to use them before they go live.

You can choose the level of your support.

Stay kind, vigilant and ready!

$5 /month

  • Ad-free account
  • Instant comments
  • Direct communication
  • New features and apps suggestions
  • Early access to new apps and features

$50 /year

$10 /month

  • Ad-free account
  • Instant comments
  • Direct communication
  • New features and apps suggestions
  • Early access to new apps and features

$100 /year

$25 /month

  • Ad-free account
  • Instant comments
  • Direct communication
  • New features and apps suggestions
  • Early access to new apps and features

$200 /year

You can also support us by sending us a one-off payment using PayPal:

One Comment

Leave a reply