A series of coronal mass ejections (CMEs) produced by Regions 2887 and 2891 over the past couple of days will likely impact Earth by late November 3 to early November 4, causing additional enhancements to the solar wind environment already enhanced due to coronal hole influence. CME effects are expected to persist through November 5.
As a result, SWPC has issued a G2 – Moderate geomagnetic storm watch for November 4.
(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.
Quiet to unsettled geomagnetic field levels are expected for most of November 3 ahead of the November 2 CMEs.1, 2
G1 – Minor geomagnetic storm conditions are likely, with a chance for G2 – Moderate storm levels, late on November 3 to early on November 4 due to combined CME/CH HSS activity.2
Unsettled to active levels are expected on 05 Nov as CH HSS and CME effects wane.
- A geomagnetic sudden impulse was detected at 19:57 UTC, signaling the arrival of CME to Earth.
Space Weather Message Code: SUMSUD Serial Number: 232 Issue Time: 2021 Nov 03 1957 UTC SUMMARY: Geomagnetic Sudden Impulse Observed: 2021 Nov 03 1957 UTC Deviation: 21 nT Station: FRD NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-
- Series of CMEs impact Earth, sparking G3 – Strong geomagnetic storming – The Watchers
1 Long-duration M1.7 solar flare erupts from geoeffective AR 2981, CME impact expected – The Watchers
2 Forecast Discussion Issued: 2021 Nov 03 1230 UTC – Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
Featured image credit: ESA/NASA, Helioviewer, TW
If you value what we do here, open your ad-free account and support our journalism.
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!