History of Geo- and Space Sciences
History of Geo- and Space Sciences
History of Geo- and Space Sciences
Articles | Volume 12, issue 2
Articles | Volume 12, issue 2
https://doi.org/10.5194/hgss-12-131-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hgss-12-131-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 12, issue 2
15 Sep 2021
 | 15 Sep 2021

Early history of sudden commencement investigation and some newly discovered historical facts

Yasuharu Sano and Hiroshi Nagano

Viewed

Total article views: 1,130 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
694 325 111 1,130 40 48
  • HTML: 694
  • PDF: 325
  • XML: 111
  • Total: 1,130
  • BibTeX: 40
  • EndNote: 48
Views and downloads (calculated since 15 Sep 2021)
Cumulative views and downloads (calculated since 15 Sep 2021)

Cited

Latest update: 10 Aug 2025
Download
Short summary
This paper studies the early history of geomagnetism (i.e., history before World War II). At that time, the problem of whether the start time of a magnetic storm was simultaneous or not all over the world was discussed. International and domestic research activities of Aikitu Tanakadate, a Japanese geoscientist, were studied by investigating his personal letters concerning with this problem. We will present a hypothesis on the first discoverer of this problem.
Read more
Share