GB2RS Propagation News
Propagation News – 26 August 2018
This past week was characterised by low sunspot numbers and unsettled geomagnetic conditions. The K index hit three and four during the week due to yet another large elongated coronal hole on the Sun’s surface. But it wasn’t all bad news as there was DX to be had if you employed the right equipment. Roger, […]
Propagation News – 19 August 2018
Matter from a solar coronal hole sent the K-index to four on two occasions last week. This adversely affected the ionosphere and on Thursday morning the maximum usable frequency over 3,000 kilometres was struggling to get much above 10MHz. Earlier in the week conditions had been much better. In fact, there were signs we are […]
Propagation News – 12 August 2018
The Sun remained spotless this week as the solar flux index stuck resolutely around the 70 mark. The tiny sunspot that made an appearance on the first of August didn’t come to much and had vanished by the third. This underlines that we must be getting closer to sunspot minimum, although don’t expect to see […]
Propagation News – 5 August 2018
The solar flux index stayed around the 70 mark last week, although a new tiny sunspot did become visible on Tuesday. Unfortunately this had little real effect on the SFI, although it did push the sunspot number to 11. This can be misleading due to the way sunspot numbers are calculated. You score 10 for […]
Propagation News – 29 July 2018
The solar flux index hit 66 on Thursday 26th, which is probably the lowest it will go this sunspot minimum. At the time of writing the visible solar disk has been devoid of sunspots since 27 June, apart from the tiniest fleck that sent the sunspot number to 11 for one day on 12 July. […]
Propagation News – 22 July 2018
Last weekend’s IARU contest saw a lot of action on the HF bands, which just goes to show that it isn’t all about sunspots. In fact, we have now gone more than three weeks without sunspots, which has been described as almost a decade-class event. The last time the sun lost its spots for 21 […]
