TY - JOUR A1 - Silva, R. P. A1 - Sobral, J. H. A. A1 - Koga, D. A1 - Souza, J. R. T1 - Evidence of prompt penetration electric fields during HILDCAA events JO - Ann. Geophys. J1 - ANGEO VL - 35 IS - 5 SP - 1165 EP - 1176 Y1 - 2017/10/27 PB - Copernicus Publications SN - 1432-0576 UR - https://angeo.copernicus.org/articles/35/1165/2017/ L1 - https://angeo.copernicus.org/articles/35/1165/2017/angeo-35-1165-2017.pdf DO - 10.5194/angeo-35-1165-2017 ER -