We’ve had another week of disturbed geomagnetic conditions with the Kp index at four or five for long periods. On the evening of the 12 March, Kp was five and, at the time of writing, has stayed there for a total of five three-hour periods. This has taken its toll on the ionosphere with MUFs […]

We started last week with geomagnetic disturbances that saw the Kp index rise to a maximum of 5.67 on the 28 February and then hover around the 4.5 mark for the next couple of days. As predicted, the rest of the week went quite well, with the Kp index in the range of one to […]

We had another week of mixed geomagnetic conditions. The Kp index rose to a high of five with visible aurora over the UK at times. Two large coronal holes are now both facing Earth. A solar wind stream flowing from these zones is expected to flow past Earth, possibly on Friday 28 February or Saturday […]

It seems we were a little over-ambitious in suggesting that last week would be better for HF propagation. It looked like we would avoid coronal mass ejections and see the Kp index fall to lower levels. Unfortunately, the Sun had other ideas and a fast-moving solar stream, often moving faster than 500 km/s, had a […]