AAVSO Sudden Ionospheric Disturbance Report April 2002 Observers: A29 A50 A52 A63 84 A87 A93 A95 A96 A97 A98 A99 A100 A102 YYMMDD Event Peak Importance 020401 1533 2 020402 0438 1+ 020402 1324 2+ 020402 1409 1+ 020402 1445 1 020402 1500 1 020402 1546 1 020403 1425 1+ 020403 2001 1+ 020404 0435 2+ 020404 1050 2+ 020404 1418 1 020404 1437 1- 020404 1533 2+ 020405 1314 1+ 020405 1442 1 020405 1521 2 020405 1720 2 020406 0617 2+ 020406 1045 1+ 020406 1409 2 020407 0520 1 020407 0823 2+ 020407 1426 2+ 020407 1515 1+ 020409 0042 1- 020409 0734 2 020409 1304 2+ 020409 1555 2 020409 1914 2+ 020410 0650 1+ 020410 1230 3 020410 1424 2 020410 1542 2 020410 1850 1- 020410 1906 2+ 020411 0610 2 020411 0906 1- 020411 0931 1 020411 1626 2+ 020411 1838 2 020412 1313 1+ 020412 1344 1+ 020412 1604 2+ 020412 1758 3 020413 1334 1+ 020414 0452 1+ 020414 0652 2 020414 0736 2 020414 1342 2+ 020415 1731 2 020416 1046 2+ 020416 1313 3 020416 1540 1- 020417 0656 1 020417 0810 3+ 020417 1127 1- 020417 1342 2 020417 1700 2+ 020418 0700 2 020418 0907 2 020418 1051 1+ 020418 1518 2 020419 0703 1+ 020419 0753 1- 020419 0905 1+ 020419 1647 2 020419 1820 2+ 020420 1211 2+ 020420 1544 2+ 020422 1215 2+ 020422 1415 2 020424 1555 1- 020424 1604 2 020424 2155 2+ 020427 1540 2+ 020429 0942 1+ 020430 0823 2 020430 1119 2 020430 1420 2+ ************************************************* Importance Summary - Apr 2002 1- events: 8 1 events: 8 1+ events: 16 2 events: 22 2+ events: 22 3 events: 3 3+ events: 1 ------------------ Total events: 80