SUDDEN ENHANCEMENTS OF ATMOSPHERICS - SEA Month: JUNE YEAR: 2009 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. 1 0504 0547 0537 1 2 43 4 10 0606 0653 0640 1 2 47 3 14 0647 0738 0714 1 2 51 2a 0820 0905 0857 1 2 45 4 Evaluated by J.Klimes