Tag: propagation

Solar flare causes ‘Ground Level Event’

Sunday’s powerful X8-class solar flare from departing sunspot AR2673 accelerated a swarm of protons toward Earth, producing a strong solar radiation storm and a ‘ground level event’ (GLE)
For the full article, http://www.southgatearc.org/news/2017/september/solar-flare-causes-ground-level-event.htm

Original Article

RED ALERT – Aurora Now!

The current disturbance level is at 309.7nT. Pity we have clouds in Birmingham (UK) but they have quite a nice pink tinge to them.

Major solar flare

The Space weather site reports on Sept. 6 at 1202 UT, sunspot AR2673 unleashed a major X9-class solar flare – the strongest solar flare in more than a decade

Original Article

More Professional and Citizen Research Suggests Eclipse Briefly Affected HF Propagation

Both professional and citizen scientists conducted formal and informal investigations into the effect of the August 21 solar eclipse on HF radio propagation. Nathaniel Frissell, W2NAF, of HamSCI, has said it will take some time to get a more scientific analysis of data compiled during the Solar Eclipse QSO Party. Frissell and others are investigating whether the sudden absence of sunlight durin…

Original Article

Space Weather Prediction Center Upgrades Geomagnetic Storm Watch to G3 (Strong)

NOAA’s Space Weather Prediction Center (SWPC) has upgraded its geomagnetic storm watch for today and tomorrow (September 6 and 7) to G3 (Strong).

“The G3 Watch is in anticipation of the expected arrival of a coronal mass ejection (CME) that took place in association with an M5 flare,” the SWPC said. The Center said its current analysis and forecasts indicate that the CME will arrive late on Sept…

Original Article

Solar Flux Takes One Giant Step

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.

“The ionosphere will start cooling later this mon…

Original Article

Propagation de K7RA – Aug 26

All solar indicators rose over the past week (August 17 to 23), with average daily sunspot number increasing from 15.3 to 39.9, and average daily solar flux from 72 to 84.6, compared to the previous seven days
Original Article

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