Strong Geomagnetic Storm As Sunspot With Reversed Polarity Appears On Sun- Sends CME Our Way

G3 Strong geomagnetic storm levels associated with the passage of slow-moving August 20th Coronal Mass Ejection were observed early August 26, 2018.

A faint and slow-moving CME was first seen in LASCO coronagraph imagery at approximately 22:00 UTC on August 20. The source for this CME is unclear, SWPC forecasters said August 21, calling for a glancing blow and negligible impact due to CME’s lack of density and slow nature.

Geomagnetic K-index of 4 threshold was reached at 21:43 UTC on August 25, followed by K-index of 5 (G1 Minor) at 01:54 UTC on August 26, K-index of 6 (G2 Moderate) at 02:57 and K-index of 7 (G3 Strong) at 05:59 and 07:38 UTC.

G3 Strong geomagnetic storm potential impacts:

Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.

Induced Currents – Power system voltage irregularities possible, false alarms may be triggered on some protection devices.

Spacecraft – Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.

Navigation – Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.

Radio – HF (high frequency) radio may be intermittent. Aurora – Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

Taken by John McKinnon on August 26, 2018 at Four Mile Lake, Alberta, Canada

Taken by John McKinnon on August 26, 2018 @ Four Mile Lake, Alberta, Canada. Via SpaceWeather.com

The level of disturbance this CME caused just a couple of hours after its arrival is not surprising if you take into account the current state of our weakened geomagnetic field.

There is an interesting new sunspot on the Earth-side of the Sun, AR 2720 numbered on August 24.

The magnetic polarity of this region is reversed, its north and south ends are backward compared to the polarity of normal sunspots in the current solar cycle (SC24).

“Could this be the first big sunspot of the next solar cycle, popping up now in the middle of solar minimum?” Dr. Tony Phillips of SpaceWeather noted.

Original Article:https://watchers.news/2018/08/26/cme-sparks-g3-strong-geomagnetic-storm-reverse-polarity-sunspot-appears-on-the-sun/


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