SUDDEN ENHANCEMENTS OF ATMOSPHERICS - SEA Month: DECEMBER YEAR: 2008 Observing Station: OBSERVATORY U P I C E CZECH REPUBLIC Lat.: 50 30 26.6 N Sea level: 416 m Long.: 16 00 43.5 E Frequency: 27 kHz Band pass: 308 Hz a 3 dB Chart speed: 3.4 cm/H Recorder time constant: 27 sec Date Start End Max. Imp. Def. Dur. Type REMARKS UT UT UT SEA min. 3 1216 1257 1234 1 2 41 5 UNCERTN 11 1137 1239 1155 1 2 62 5 1304 1400 1334 1 2 56 3 12 1148 1258 1203 1 2 70 3 UNCERTN Evaluated by J.Klimes