Magnetic Observations in Canada during the Solar Eclipse of March 7, 1970

Abstract

THE effects of solar eclipses on the geomagnetic field have been summarized by Matsushita¹. On quiet days clear changes in the geomagnetic field were seen superimposed on the Sq variation by Egedal and Ambolt² and by Kato³. The effect to be described here is somewhat different in that the eclipse occurred during a magnetically disturbed time, and the effect could only be isolated by comparing magnetic records at an eclipsed station with simultaneous records at other stations situated outside the region of total eclipse. In the present study four stations situated on a line approximately at right angles to the path of totality were specially equipped with geomagnetic variographs (Table 1).