SUDDEN ENHANCEMENTS OF ATMOSPHERICS - SEA Month: APRIL 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 0736 0804 0746 1 2 28 6 0822 0914 0848 1 2 52 3 1101 1153 1118 1 2 52 5 1446 1510 1452 1 2 24 5 2 0925 1036 0943 1 2 71 5 4 1607 1711 1633 1 2 64 3 5 0542 0640 0549 1 2 58 5 6 1314 1528 1326 2 4 134 5 7 1020 1159 1143U 1 2 99 3 8 0943 1000 1000 1 2 17 6 PREFLARE 1000 1136 1025 3 4 96 5 1256 1437 1327 1 2 101 3 1548 1658 1610 1 2 70 3 10 1121 1144 1123 1 2 23 5 11 1412 1456 1420 1 2 44 3 12 0749 0828 0758 1 2 39 5 1004 1121 1020 2 3 77 5 1212 1355 1240 1 3 103 5 1409 1458 1427 1 2 49 3 14 0932 1009 0940 1 2 37 3 1231 1305 1240U 1 2 34 5 1359 1519 1409 1 2 80 3 15 0819 0846 0832 1 2 27 6 0909 0948 0927 1 2 39 3 1642 1730 1649 2 4 48 1 16 0810 0905 0919U 1 2 55 3 0929 1022 0934 1 2 53 3 18 1433 1558 1520U 1 2 85 3 19 1319 1433 1339 1 2 74 5 1435 1611 1502 1 2 96 3 20 1112 1138 1121 1 2 26 2a 1407 1456 1424 1 2 49 3 21 0736 0817 0740 1 2 41 5 1300 1342 1314 1 2 42 3 1348 1438 1404 1 2 50 3 1446 1553 1502U 1 2 67 3 1605 1646 1616 1 2 41 5 22 0729 0810 0737 1 2 41 5 23 0746 0830 0758 2 3 44 5 0840 0918 0859 1 2 38 3 0928 1018 0955 1 3 50 5 1041 1146 1047 1 2 65 5 PREFLARE 1146 1231 1154 2 3 45 1 1329 1456 1348U 1 2 87 3 1459 1625 1525 1 2 86 3 24 1127 1508 1146U 1 2 221 3 25 0530 0633 0542 3 4 63 1 0829 0900 0844 1 2 31 3 0943 1013 1013 1 2 30 3 PREFLARE 1013 1108 1017 2 3 55 5 1600 1706 1618 1 3 66 5 27 0716 0848 0723 1 2 92 3 0911 1119 1004U 1 2 128 3 1231 1504 1306 1 2 153 3 28 0817 0914 0828U 1 2 57 3 1426 1624 1447 1 2 118 5 30 0946 1129 1032U 1 2 103 3 Evaluated by L.Krivsky and J.Klimes