TY - JOUR A1 - Roldugin, V. C. A1 - Maltsev, Ye. P. A1 - Vasiljev, A. N. A1 - Vashenyuk, E. V. T1 - Changes of the first Schumann resonance frequency during relativistic solar proton precipitation in the 6 November 1997 event JO - Ann. Geophys. J1 - ANGEO VL - 17 IS - 10 SP - 1293 EP - 1297 Y1 - 1999/10/31 PB - Springer Verlag SN - 1432-0576 UR - https://angeo.copernicus.org/articles/17/1293/1999/ L1 - https://angeo.copernicus.org/articles/17/1293/1999/angeo-17-1293-1999.pdf DO - 10.1007/s00585-999-1293-9 ER -