@article{oai:nagoya.repo.nii.ac.jp:00019704,
 author = {金原, 淳 and 木村, 靖子 and KIMPARA, Atsushi and KIMURA, Yasuko},
 issue = {1-2},
 journal = {空電研究所報告},
 month = {Mar},
 note = {In order to see if the recommendation 40 of working group of WMO in 1957 can be applied well on the results obtained in Japan, the authors examined the records of intensity meters of atmospherics at 27 kc/s observed continuosly in 1957 at Toyokawa station. They found fairly regular behaviours of atmospherics which can be reasonably explained by the distribution of sources with seasonal variations as well as by the principle of wave propagation. "A" (Sunrise effect) is found generally 20 min. before sunrise except in winter where it is found about 2 hours before sunrise. "B" (First minimum) and "C" (Recovery effect) are often found more than once and also found frequently in the evening. "D" (Morning minimum) is found about 2 hours after sunrise,  but sometimes not c1early. "E" (Afternoon maximum) is found about 2 hours before sunset and sometimes indicates flat maximum. "F" (Late minimum) is found within half-hour about sunset. "G" (Night maximum) is not found in Toyokawa. After sunset the field intensity of atmospherics increases gradually and reaches night levels abeut 2½ hours after sunset, and keeps its level nearly constant till dawn when "A" is found. "G" should be called sunset effect in Japan. It is due to the difference of distribution of sources between Europe and Asia.},
 pages = {26--32},
 title = {極年観測における空電強度記録について},
 volume = {8},
 year = {1958}
}