Geogmanetic Field Variations at the South America Equatorial Electrojet

This paper presents part of a study of the geomagnetic field variations at the South America Equatorial Electrojet. We have used data from the horizontal (H) and ver- tical (Z) components of the geomagnetic field recorded in two repeated stations: Cachoeira do Arari (01o 00’ 41’’ S and 48o 57’ 48’’ O) and Capitao Poco (01° 44’ 05’’ S and 47° 03’ 43’’ O) both located in the Para State, Brazil.  These variations at low latitude regions present original characteristics. Data from three magnetic observatories Ascension Island, Tatuoca and Huancayo were used in this study also.