Compiled by G0KYA, G3YLA and G4BAO on 16 April, 2026 Last week was characterised by a low Kp index and an equally low solar flux index. The Kp index was predominately below 2 all week thanks to a lack of Earth-directed CMEs, or coronal holes. Unfortunately, that is about to change. The solar index has […]

Compiled by G0KYA, G3YLA and G4BAO on 9 April, 2026. After a pretty stormy run-up to Easter, from a geomagnetic disturbance point of view, the Sun has been quieter. In fact, the Kp index has been below 3 all week. Unfortunately, the solar flux index has also declined, standing at 108 on Thursday, 9 April. The […]

Over the last week we have had a fair sprinkling of sunspots, along with some enormous coronal holes, including one almost rectangular hole. Coronal holes are lower energy areas on the Sun with open magnetic field lines, allowing solar plasma to flow out. Geomagnetic conditions have mainly been settled, with the Kp index hitting a […]

After last weekend’s HF disruption, the latter half of the week was fairly settled. Last weekend, the Kp index rose to 7, sparking visible aurora around the UK. The disruption continued, on and off, until Tuesday, 24 March when the Kp index fell below 3 again. The disruption was caused by a solar wind stream […]