Photograph of the sun depicting flare sequence. Back of photograph reads, "B49 Apr. 12. 18:41 GMT".
Photograph, 12 April 1950 Flare Sequence
1950-04-12
image
Sun--Research
High Altitude Observatory (HAO) Records
https://aspace.archives.ucar.edu/repositories/2/resources/25
Copyright University Corporation for Atmospheric Research (UCAR). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
http://n2t.net/ark:/85065/d7n29vcd