A surprise and somewhat unexpected G1-class geomagnetic storm with solar wind reaching speeds of more than 600 km/s, see graph, is now beginning to subside after a stream of solar wind buffeted Earth's magnetosphere from a small coronal hole on our star last night.
According to Spaceweather.com, a stream of solar wind hit Earth on Jan. 25th. The impact sparked an unexpected G1-class geomagnetic storm. The solar wind was expected. It emerged from a small hole in the sun's atmosphere, which forecasters had been tracking for days. The surprise occurred when a crack formed in Earth's magnetic field. Solar wind poured in, fueling a storm in disproportion to the size of the stream.
Our sun is slowly coming out of hibernation after reaching solar minimum last year with the lowest sunspot activity in the last 12 years in 2019. 2020 and early 2021 has seen the sun begin to wake up as it enters solar cycle 25.