Since 01:00 on June 27, 2025, weak magnetic storms caused by a medium-sized coronal hole have been recorded on Earth. The planet has been in its zone of influence since the beginning of June 26, when geomagnetic disturbances were already observed, but only now have they reached the level of weak storms (G1). The solar wind speed has increased to 800 km/s.
On a scale of magnetic storms of five levels, the current disturbances remain minimal. For comparison, on June 1, 2025, a G4 level storm was recorded, caused by a large ejection of solar matter. The impact of the coronal hole will last about 20–30 hours, and by midday on June 27, the geomagnetic situation will begin to stabilize.
Despite the high speed of the solar wind and the increased temperature of the interplanetary plasma, the impact on Earth remains moderate — storms above the G2 level are not expected. During the day, the magnetic field experiences strong external pressure, but geomagnetic activity remains mainly at a low level.
Currently, the interplanetary magnetic field remains moderate, which prevents the "breakthrough" of the Earth's magnetic shield and the penetration of solar plasma inside. The impact is expected to last for several more hours, after which the situation will begin to stabilize.
Space weather on June 27, 2025 is characterized by low flare activity without risks for the Earth and the probability of weak and moderate magnetic storms in the afternoon.
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