SUDDEN ENHANCEMENTS OF ATMOSPHERICS - SEA Month: JANUARY YEAR: 2020 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. NO EVENTS NO OBSERVATION 23. 0000 2400 24. 0000 2400 25. 0000 2400 26. 0000 2400 27. 0000 2400 Evaluated by J.Klimes