A Caltech Library Service

The Direction of Rotation of Sun-Spot Vortices

Hale, George E. (1915) The Direction of Rotation of Sun-Spot Vortices. Proceedings of the National Academy of Sciences of the United States of America, 1 (6). pp. 382-384. ISSN 0027-8424.

PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


Whirling storms in the earth's atmosphere, from the extensive and moderate cyclone to the small and destructive tornado, follow a well-known law of rotation: right-handed or clockwise in the southern hemisphere and counter-clockwise in the northern. These directions are easily explained by the increasing eastward velocity of the air from pole to equator. As sun-spots are vortex phenomena, analogous in many respects to tornadoes, it is interesting to inquire as to the law of their rotation, since this may throw light on their nature and origin.

Item Type:Article
Related URLs:
URLURL TypeDescription
Additional Information:Copyright © 1915 by the National Academy of Sciences. Read before the Academy, December 8, 1914. Received, April 15, 1915.
Issue or Number:6
Record Number:CaltechAUTHORS:HALpnas15a
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:11706
Deposited By: Archive Administrator
Deposited On:20 Sep 2008 03:37
Last Modified:03 Oct 2019 00:21

Repository Staff Only: item control page