GB2RS Propagation News
Propagation News – 20 June 2021
A large coronal hole returned last week and started to become Earth-facing on Monday the 14th. The high-speed solar wind stream from the hole impacted the Earth on Tuesday evening, pushing the Kp index to five. Luckily, conditions returned to normal by late Wednesday and the Kp index was down to two or three thereafter. […]
Propagation News – 13 June 2021
The predicted geomagnetic disturbance we spoke about last week didn’t amount to much. The Kp index rose to four on Monday evening, but the disturbance was short-lived and it was back to one later on Tuesday. Region 2829 was the only sunspot group visible on the Sun later in the week. This pushed the solar […]
Propagation News – 6 June 2021
The Sun was pretty quiet over the last week, with few sunspots and a solar flux index in the mid-70s. From a peak of 82 on Sunday, the SFI declined to 75 on Thursday when there were just two small sunspot groups visible, regions 2827 and 2929. As predicted, geomagnetic conditions have been mostly settled, […]
Propagation News – 30 May 2021
“May you live in interesting times.” So says the ancient Chinese curse, and last week was interesting, to say the least. Sunspot region 2824 was joined by region 2826, pushing the solar flux index to 88. At the same time, a coronal mass ejection from region 2824 threatened to push the Kp index high on […]
Propagation News – 23 May 2021
We had another wild week with sporadic E bringing most of the excitement on the upper HF bands. Transatlantic multi-hop Es brought USA contacts to many UK stations, mainly on CW and FT8, although there were some SSB ones too. The sporadic E action is always welcome on the HF bands during this time of […]
Propagation News – 16 May 2021
Last week was a real roller coaster ride in terms of HF propagation. While the solar flux index remained in the 70s, we have had C-class solar flares and a coronal mass ejection that hit the Earth on the 12th of May. This ultimately pushed the Kp index to seven. It was largely as a […]
