The strongest magnetic storm in two months is expected on Earth tonight.

A magnetic storm is expected to begin today, forecast to be the strongest since mid-January this year. A G4 event occurred between the 19th and 21st. The storm is the result of a combination of several factors, the most important of which were several plasma ejections observed on the Sun earlier in the week. The influence of coronal holes currently forming on the Earth-facing side of the Sun may also be superimposed.

Over the past 24 hours, the forecast has been revised several times, each time tightening. Currently, the full duration of the geomagnetic disturbance period is expected to be approximately six days, until Tuesday of next week (March 24). The most powerful events are expected between the 19th and 21st (the same dates as the January storm), when the two largest plasma ejections will occur. Then, from the 22nd to the 24th, a weaker "tail" from the influence of the coronal holes will be observed.

The precise schedule of disturbances during such a complex, multifactorial event is difficult to predict, but there is a high probability that some of the peaks will occur in the evening and nighttime, allowing for the observation of auroras. At this intensity, the auroras could theoretically descend to latitudes of 50–55 degrees. The first such opportunity is expected today, Thursday night into Friday.

An increase in solar wind density and speed, indicating the arrival of the first ejection, should be a precursor to a geomagnetic event. Toward evening, you can begin to occasionally check the charts.