G1 – Minor geomagnetic storm in progress

g1-minor-geomagnetic-storm-in-progress

A negative polarity, southern crown coronal hole extension has moved into a geoeffective position enhancing the solar wind environment. Unsettled levels are expected on April 21 as high speed stream (HSS) effects persist. By late April 22 (UTC), a positive polarity coronal hole high speed stream (CH HSS) is expected to become geoeffective causing quiet to unsettled conditions.

Geomagnetic K-index of 4 threshold was reached at 08:57 UTC on April 20, followed by K-index of 5 (G1 – Minor geomagnetic storm) at 10:44 UTC.

***

Space Weather Message Code: ALTK04
Serial Number: 2154
Issue Time: 2020 Apr 20 0857 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2020 Apr 20 0855 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents – Weak power grid fluctuations can occur.
Aurora – Aurora may be visible at high latitudes such as Canada and Alaska.

***

Space Weather Message Code: ALTK05
Serial Number: 1293
Issue Time: 2020 Apr 20 1045 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2020 Apr 20 1044 UTC
Synoptic Period: 0900-1200 UTC

Active Warning: Yes

NOAA Scale: G1 – Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents – Weak power grid fluctuations can occur.
Spacecraft – Minor impact on satellite operations possible.
Aurora – Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

***

Featured image credit: NOAA/SWPC

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:

2 Comments

Leave a Reply to Kenneth cash Cancel reply