SUDDEN ENHANCEMENTS OF ATMOSPHERICS - SEA Month: JULY YEAR: 2013 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. 2 1740 1812 1750 1 2 32 3 UNCERTN 3 0703 0808 0711 2 4 65 5 5 1301 1327 1305 1 2 26 5 UNCERTN 21 0831 0949 0847 1 2 78 3 UNCERTN 24 1319 1337 1324 1 2 18 1 UNCERTN Evaluated by J.Klimes