ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] Unfortunately, the precise time of the onset of the disturbance cannot be determined since the ionograms are taken at J-hourly intervals only. From the fact that the critical frequency was still normal at 10 h. 00 m., and unusually high at 10 h. 30 m. there results a velocity of the 'agent' of ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/193963a0