4 - 22 cloud with

7 days cycle

4 - 29

5 - 6

5 - 13

5 - 20

5 - 27

4 - 22 cloud with

14 days cycle

5 - 6

5 - 20

4 - 23 geomagnetic

Storm with - 7 days cycle

4 - 30

5 - 7

5 - 14

5 - 21

5 - 28

4 - 23 geomagnetic storm with 14 days cycle

5 - 7

5 - 21