SUDDEN ENHANCEMENTS OF ATMOSPHERICS - SEA Month: OCTOBER YEAR: 2007 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. 9 0747 0808 0750 1 2 21 5 UNCERTN 16 1051 1128 1110 1 2 37 2b UNCERTN 1255 1332 1306 1 2 37 5 UNCERTN Evaluated by J.Klimes