• Negative polarity CH HSS drives isolated periods of geomagnetic storming

    Solar wind parameters reflected a brief enhancement associated with the arrival of a co-rotating interaction region (CIR) and subsequent negative polarity coronal hole high speed stream (CH HSS) late June 22, 2016. A gradual increase in solar wind speeds began after…

  • Geoeffective coronal hole, geomagnetic storm in progress

    A co-rotating interaction region (CIR) – the transition zone between slow- and fast-moving streams of solar wind – has hit Earth's magnetic field on June 14, 2016, sparking geomagnetic storms. As of 19:55 UTC, a G2 – Moderate geomagnetic storm is in progress and…

  • Recurrent CH HSS causing geomagnetic storms

    A recurrent, negative polarity coronal hole high speed stream (CH HSS) has hit Earth's magnetic field causing geomagnetic storms on June 5, 2016. A G2 (Moderate) geomagnetic storm watch is currently in effect. This same CH HSS has affected Earth on May 8 with…

  • Strong geomagnetic storms in progress

    A G3 – Strong geomagnetic storm conditions were observed beginning 05:59 UTC on May 8, 2016. G2 – Moderate to G3 – Strong geomagnetic storm conditions are expected through the rest of the day and possibly into May 9 and 10. This activity is caused by a recurrent,…

  • G2 – Moderate geomagnetic storm

    Enhanced solar wind conditions have fueled elevated geomagnetic field activity early May 2, 2016. Geomagnetic storms reaching G2 – Moderate levels have been observed. Geomagnetic K-index of 5 (G1 – Minor geomagnetic storm) threshold was first reached at 00:37 UTC on…

  • Impulsive solar flare measuring M6.7 erupted from Region 2529

    An impulsive solar flare measuring M6.7 (R2 – Moderate radio blackout) erupted from Active Region 2529 at 00:29 UTC on April 18, 2016. The event started at 00:14 and ended at 00:39 UTC. This was the first M-class solar flare since M1.1 on February 15, 2016, the…

  • Geomagnetic storm in progress

    A geomagnetic storm reaching G1 – Minor levels is currently in progress as Earth enters a stream of positive polarity high-speed solar wind. Geomagnetic K-index of 5 (G1 – Minor geomagnetic storm) threshold was reached at 20:40 UTC on April 7: Space Weather Message…

  • Recurrent CH HSS causing geomagnetic storming on Earth

    Our planet is passing through a stream of fast-moving, negative polarity solar wind. Geomagnetic storming reached G1 – Minor levels at 17:24 UTC. A G2 – Moderate warning is in effect for the rest of the UTC day. This is a recurrent CH HSS, responsible for G3 -…

  • A new round of geomagnetic storming sparked

    A new round of geomagnetic storming is in progress on March 15, 2016. Solar wind parameters are enhanced since late March 14 due to the onset of a negative polarity coronal hole high speed stream (CH HSS) and are expected to remain like that through March 16….