SUDDEN ENHANCEMENTS OF ATMOSPHERICS - SEA Month: JUNE YEAR: 2010 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. 8 0603 0623 0613 1 2 20 6 UNCERTN 12 0911 0947 0918 1 2 36 5 13 0533 0618 0544 2 3 45 5 Evaluated by J.Klimes