(ORDO NEWS) — The red zones on this global map show where shortwave transmissions are absorbed. Frequencies below 15 MHz are almost completely darkened, and everything below 35 MHz is attenuated.
What caused it? Protons accelerated by Monday’s extremely rare CME are still colliding with our planet 3 days later.
The Earth‘s magnetic field pushes these particles toward the poles, where their ionizing effect causes short-wave radio emission to be absorbed. PCA is getting stronger.
Protons directed by the Earth’s magnetic field into the Antarctic atmosphere ionized the D-layer of the ionosphere. This disrupted the normal propagation of radio signals at frequencies below ~30 MHz.
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