Preliminary analysis of the geomagnetic pulsations observed at Teoloyucan, Mexico

Abstract

Geomagnetic micropulsations have been observed almost continuously since February 1993 at the Geomagnetic Observatory in Teoloyucan, Mexico, in the frequency band 0.01-0.20 Hz (5-100 seconds in period). In this paper we present a preliminary analysis of the data showing the
frequency disrribution of all the events with respect to local time and along the year. We foud the maximum occurrence of micropulsations around noon and the minimum aroWld midnight A seasonal variation seems to be present with maxima in March and December and a minimum in July.