The National Oceanic and Atmospheric Administration’s Space Weather Prediction Center (SWPC) has issued a moderate (G2) geomagnetic storm watch for September 13. A coronal hole high-speed stream, originating from a recurrent, positive polarity coronal hole on the Sun’s surface, prompted the prediction. Minor (G1) geomagnetic storming is possible on September 14.
It’s been a turbulent time on the HF bands over the past several days. On Sunday, September 10, a strong (R3) radio blackout occurred at 1606 UTC. The source, Region 2673, has rotated just around the visible disk. Severe (G4) geomagnetic storm levels were observed at 2350 UTC on September 7, and again at 0151 UTC and 1304 UTC on September 8, due to the effects of a coronal mass ejection (CME).
Continue reading Moderate Geomagnetic Storm Watch Issued
By Sarah Lewin, Space.com Associate Editor
This article was updated at 5:44 p.m. EDT to indicate that a coronal mass ejection was observed coming from the site of the solar flare.
Early this morning (Sept. 6), the sun released two powerful solar flares — the second was the most powerful in more than a decade.
At 5:10 a.m. EDT (0910 GMT), an X-class solar flare — the most powerful sun-storm category — blasted from a large sunspot on the sun’s surface. That flare was the strongest since 2015, at X2.2, but it was dwarfed just 3 hours later, at 8:02 a.m. EDT (1202 GMT), by an X9.3 flare, according to the National Oceanic and Atmospheric Administration’s Space Weather Prediction Center (SWPC). The last X9 flare occurred in 2006 (coming in at X9.0).
Continue reading Sun Unleashes Monster Solar Flare, Strongest in a Decade
On Labor Day, the solar flux took a huge leap, from 120 to 183 from a day earlier. At 1300 UTC today, the solar flux was 144, and the sunspot number was 122. This bodes well for operation on the higher bands, with transequatorial propagation (TEP) a possibility on 12 and 10 meters as well as improved nighttime conditions on 20, 17, and 15 meters.
Continue reading Solar Flux Takes One Giant Step