Problems of Identifying Lunar Geomagnetic Effects at Huancayo

Abstract

Monthly and semimonthly harmonic analyses of H are performed and some evidence of a diurnal variation of the lunar tide strength is found. Contamination of the data by magnetic disturbance can be identified by examining the phase progression in local time of the semimonthly component. This contamination is also found in the work of some other authors. It is suggested that some effects previously described as “lunar” are due to other causes.