24 



Tabell 3^. 

 Åskfrekvensen vid olika breddgrader. 



1906 



60—62° 



62-64° ; 64-66° 



i 11 



60-62° 



62—64° 



64—66° 



I 



11 



I 



u 



I 



II 



I + II 





A s k f r e 



k v e n 



s 





April . ... 



0.3 



0.2 



0.0 



0.0 



0.0 



ö.o 



-0.2 



0.0 



-0.0"' 



Maj ..... 



3.6 



4.4 



1.9 



5.6 



3.0 



3.5 



- -2,8 



4.3 



3.3 



Jxini .... 



3.2 



4.2 



1.5 



3.0 



2.-8- 



3.3 



3.^- 



• 2.2 



3.1 



Juli 



4.3 



5.5 



5.3 



: 4.8| 



2.8 



2.0 



4.8 



i 5.0 



2.4 



Augusti . . 



3.0 



3.1 



1.9 



2.5 



3.0 



0.2 



3.0 



2.2 



1.2 -^ 



September . 



0.6 



0.2 



0.0 



0.1 



0.0 



0.0 



0.4 



0.0 



0.0 



1906 



15.0 



IT.e' 



10.6 



16.0 11.6 



9.o| 



14.7 



• 13.7 



10.0 



1905 



16.8 



18.5 



12.8 



I6.4! 8.6 



12.2 



17.4 



: 14.8 



10.7- 



1904 



9.8 



S.j 



8.t 



9.9' 3.5 



8.3' 



8.8 



: 9.6 



7.4 



1903 



12.3 



13.0 



14.0 



14.7Î 9-3 



13.6' 



12.6 



14.S 



12.2 



1903—1906 



13.5 



14.4' 



11.4 



14..! 



8.2 



10.8 



13.4 



13.2 



10.1 



TabeU 3. 



1906 



60-62° Il 62— 64° 64-66° 1 60— &2° 62—64° 64—66° 



n 



n 



II 



i + ii 



Antal stationer 



April . 

 Maj . . 

 Juni . 

 Juli . . 

 Augusti 

 September 



34 



18 



7 



13 



3 



7 



45 



29 



10 



19 



4 



8 



46 



23 



14 



13 



5 



7 



48 



27 



13 



16 



6 



8 



44 



25 



10 



14 



4 



8 



36 



18 



8 



13 



3 



7 '• 



52 

 74 

 69 

 75 

 69 

 54 



20 

 29 

 27 

 29 

 24 

 21 



10 

 12 

 12 

 14 

 12 

 10 



Bidrag t. känned. af Fini. 



