TY JOUR TI May 11–12 Extreme Space Weather Events Brief and Dose Rate Model Response KW space weather KW solar proton event KW radiation dose rate KW civil aviation KW ICAO JO Russian Journal of Earth Sciences AU Burov, V.A. AU Kholodkov, K.I. AU Aleshin, I.M. PY 2024 IS 24 PB Geophysical Center of the Russian Academy of Sciences