SUDDEN ENHANCEMENTS OF ATMOSPHERICS - SEA Month: FEBRUARY YEAR: 2004 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 0739 0910 0744 1 2 91 3 1301 1339 1306 1 2 38 3 3 0944 1016 0951 1 2 32 5 7 1110 1215 1138 1 2 65 3 UNCERTN 1317 1354 1320 1 2 27 5 9 1101 1152 1104U 1 2 51 5 1356 1443 1409 1 2 47 5 10 0903 0925 0910U 1 2 22 6 13 1059 1123 1109 1 2 24 5 15 0859 0943 0927 1 2 44 4 1121 1238 1142 1 2 77 3 1252 1328 1309 1 2 36 3 21 1258 1437 1320U 1 2 99 3 24 0856 0934 0911 1 2 38 3 25 0849 0956 0936 1 2 67 3 1130 1217 1150 1 2 47 3 PREFLARE 1217 1306 1228 1 3 49 5 1616 1647 1626 1 2 31 3 26 1400 1415 1415 1 2 15 6 PREFLARE 1415 1526 1424 2 3 71 5 27 0802 0938 0844 1 2 96 3 0956 1053 1025 1 2 57 3 1350 1438 1415U 1 2 48 3 28 0857 0927 0907 2 2 30 5 1058 1212 1131 1 2 74 3 Evaluated by L.Krivsky and J.Klimes