GB2RS Propagation News
Propagation News – 3 May 2020
Sunspots are like buses—you wait all month and two turn up at once! Even more interesting is that the sunspot groups are from two different cycles. The first group, AR2760, was from the outgoing Solar Cycle 24 and the second sunspot, AR2762, is from the new Solar Cycle 25. We know this due to their […]
Propagation News – 26 April 2020
Last week showed how difficult it can be to prepare HF propagation predictions. We said that we expected the Sun to remain settled throughout the week. But on Wednesday, the 15th, there was a stealthy, slow-moving coronal mass ejection off the Sun that barely appeared in the SOHO spacecraft imagery. However, this CME was Earth-directed […]
Propagation News – 19 April 2020
Last week we said that we expected the Kp index to rise over the weekend due to incoming solar particles from an Earth-facing coronal hole. But we did warn that it was impossible to tell how severe it might be. In the end it didn’t amount to much, as although the stream was travelling at […]
Propagation News – 12 April 2020
Sunspot group 2759, as reported last week, never really amounted to much and vanished before it got to the solar disk’s edge. The matter from a solar coronal hole did hit the Earth last weekend as we predicted, sending the Kp index to four in the early hours of Saturday morning. Even though we don’t […]
Propagation News – 5 April 2020
The high speed stream of solar particles from a coronal hole on the Sun last week wasn’t moving as fast as we initially thought. As a result, its impact on Earth, and the subsequent rise in the Kp index to four, happened in the early hours of Tuesday morning and not the weekend as we […]
Propagation News – 29 March 2020
With the solar flux index remaining at 70-71 all week, conditions were pretty predictable. The Kp index rose to two or three at times, but on the whole geomagnetic conditions were stable. There was a large coronal mass ejection off the Sun on 20 March, but it wasn’t Earth-directed and didn’t affect us. It is […]
