Jökull - 01.12.1962, Side 62

TABLE3
Average Ap figures for different subranges of the period of C oscillations
observed in California.
(a)
Range in sec 10—14
Nov. 1. 54 to Marcli 21. 55
Average period 15 sec
Number of days .......................... 1
Average Ap (2y) ........................ 43
March 22. 55 to Sept. 21. 55
Average period 18 sec
Number of days ..................... 71/^
Average Ap.............................. 25
Sept. 22. 55 to March 21. 56
Average period 24 sec
Number of days ..................... 10
Average Ap.............................. 20.5
March 22. 56 to Sept. 21. 56
Average period 20 sec
Number of days .......................... 4
Average Ap............................... 34
Sept. 22. 56 to Feb. 28. 57
Average period 23 sec
Number of days .......................... 2
Average A .......................... 18.5
Nov. 1. 54 lo Feb. 28. 51
Average period 22 sec
Number of days ........................ 24i/2
Average Ap.............................. 24.8
l’eriod subrange
(b) (c)
14-20 20-28
2
17
20i/, 3
16.1 26
21 3 51/2
17.8 12.2"
811/2 401/2
17.5' 16.3’
22i/2 591/2
19.9 16.3
1471/, 138/,
17.8' 15.4
(d)
28-40
3
13
23i/,
6.9
7
9.5
6
7.1
391/i
7.9'
TABLE 4
Nurnber of days for a given magnitude and period subrange of C oscillations
observed in California during the period Nov. 1. 54 to Feb. 28. 57
(a)
Range in sec ........................ 10—14
Magnitude I .................. 4
II ..................... II1/2
III ............ 9
IV ............. -
Sum ...................... 24i/2
Periocl subrange
(b) (c) (d) Sum
14-20 20-28 28-40
6I14 64 351/2 165
61 46i/2 4 123
25 26 — 60
— 2 — 2
1471/, I38i/2 39/2
60 JÖKULL