GB2RS Propagation News
Propagation News – 17 November 2019
Last week was pretty good in terms of HF propagation. Other than a slight blip in the Kp index on Monday, the 11th, when it rose to three due to a weak coronal hole stream, geomagnetic conditions remained settled. The Sun remained spot-free all week, although a new region was noted on the 13th. Region […]
Propagation News – 10 November 2019
We had a more settled week, geomagnetically speaking. The Sun was a lot calmer, with a lack of coronal holes and fast solar wind to disrupt the ionosphere. We also had a sign again that Solar Cycle 25 is on its way. A tiny sunspot, numbered 2750 and belonging to Cycle 25, appeared in the […]
Propagation News – 3 November 2019
Last week offered a mixed bag of HF propagation. The weekend saw the aftermath of a geomagnetic storm, triggered by matter from a solar coronal hole. This pushed the Kp index up to six and sparked auroras at the North and South poles. The disturbance eventually settled by Wednesday, after a few days of the […]
Propagation News – 27 October 2019
The solar disturbance predicted in the last report, which was due to hit Earth last weekend, didn’t amount to anything. However, the large coronal hole that has just completed its 27 day transit around the Sun’s surface certainly did. The ACE spacecraft shows that the solar wind speed increased rapidly on the morning of Thursday, […]
Propagation News – 20 October 2019
The solar minimum continued last week with zero sunspots being recorded. The good news was that geomagnetic conditions were quite settled with a maximum Kp index of three recorded. Most of the week it was between zero and two, which meant that the HF bands were performing to seasonal averages. rsgb.org/propquest shows that maximum usable […]
Propagation News – 13 October 2019
We had a mixed bag of HF propagation over the last seven days, although Monday saw maximum usable frequencies over a 3,000km path climb above 21MHz. Conditions were less good on Thursday morning, mainly due to an elevated Kp index, which reached four thanks to an enhanced solar wind with a south-facing Bz component. There […]
