Series of CMEs expected to impact Earth, G2 – Moderate geomagnetic storm watch in effect

series-of-cmes-expected-to-impact-earth-g2-moderate-geomagnetic-storm-watch-in-effect

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.

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.

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.

Update:

  • 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-explanation
  • Series of CMEs impact Earth, sparking G3 – Strong geomagnetic storming – The Watchers

References:

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

Share:

Commenting rules and guidelines

We value the thoughts and opinions of our readers and welcome healthy discussions on our website. In order to maintain a respectful and positive community, we ask that all commenters follow these rules:

  • Treat others with kindness and respect.
  • Stay on topic and contribute to the conversation in a meaningful way.
  • Do not use abusive or hateful language.
  • Do not spam or promote unrelated products or services.
  • Do not post any personal information or content that is illegal, obscene, or otherwise inappropriate.

We reserve the right to remove any comments that violate these rules. By commenting on our website, you agree to abide by these guidelines. Thank you for helping to create a positive and welcoming environment for all.

Leave a reply

Your email address will not be published. Required fields are marked *