via the ARRL: The ARRL Solar Report

Geomagnetic field activity is expected to be at minor storm levels for March 18, and then from March 27 and 27 all due to recurrent Coronal Hole influences.

Solar activity was at low levels. Multiple C-Class flares were observed from newly numbered Region 4028. More spots are rotating around the Southeast limb that maybe connected to the spot group. The largest flare of the period was a C6.8 on March 13 at 0752 UTC from old Region 4012 that recently rotated around the Southwest limb.

Weekly Commentary on the Sun, the Magnetosphere, and the Earth’s Ionosphere – March 13, 2025, by F. K. Janda, OK1HH:

“The two geomagnetic disturbances (8-9 March and 12-13 March) were both triggered by an enhanced solar wind blowing from the border between the coronal holes and the adjacent active sunspot group. OM Kevin VE3EN has largely restored the content of his website at https://www.solarham.com/, so that we could conveniently observe the entire solar evolution in the five images at the top of the main page (HMI Intensity, HMI Magnetogram, Coronal Holes, AIA 131, and SUVI 304).

“Again, it is not surprising that both disturbances were correctly predicted, including the expected worsening on the second day of each disturbance (March 9 and March 13).

“Even with thanks to relative simplicity of the situation and the clear images, it was not surprising that both disturbances were predicted (including the likely deterioration on the second day of each disturbance, i.e., 9 and 13 March). Both disturbances were followed by only gradual improvement, i.e., a return to normal.

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