Atmospheric Pressure and Geomagnetic Disturbance

Abstract

IN seeking for possible relationships between geomagnetism and atmospheric pressure, J. M. Stagg¹ compared the mean diurnal pressure variation at Aberdeen on magnetically quiet days with that on magnetically disturbed days (five of each type per month) over the seven years 1922–28. His results—shown by the individual seasons and by the year as a whole—indicated a marked reduction of the forenoon pressure maximum and enhancement of the evening maximum on disturbed days as compared with quiet days, in the years of low sunspot number (1922–24): the change of type was absent, or even partly reversed, in the years of higher sunspot number (1925–28).