G1 geomagnetic storm in progress

geomagnetic-storm-december-9-2016

A geomagnetic storm is currently in progress due to ongoing negative polarity coronal hole high speed stream (CH HSS) influence. The G1 Watch is in effect for the next three days.

Geomagnetic K-index of 5 (G1 – Minor geomagnetic storm) threshold was first reached at 20:50 UTC on December 9, 2016.

Total IMF strength and solar wind speed are expected to remain elevated through the remainder of December 9 under the continuing, early influences of the CH HSS. Total field strength is anticipated to weaken on December 10. 

K-index, 7-days, December 9, 2016K-index, 3-day, December 9, 2016

Coronal hole - December 6, 2016

Solar wind speeds are likely to remain over 500 km/s as CH HSS influence continues. Elevated solar wind speeds are expected to continue into December 11, but are anticipated to begin weakening as CH HSS effects start waning.

As a result, mostly unsettled to active conditions are expected, with isolated G1 – Minor storming periods until December 11 when conditions are expected to decrease to quiet and unsettled levels, with isolated active periods.

Meanwhile, solar activity is at very low levels and is expected to remain like that over the next three days. There is a slight chance, although decreasing, for C-class flares on December 9 and 10 due to the continued decay and inactivity trend of Region 2615.

Featured image: Aurora forecast, model run 21:50 UTC, observation time 21:40 UTC, December 9, 2016. Credit: SWPC/NOAA

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.

2 Comments

Leave a reply

Your email address will not be published.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