Depression of the ULF geomagnetic pulsation related to ionospheric irregularities

摘要: We consider a depression in intensity of ULF magnetic pulsations, which is observed on the ground surface due to appearance irregularities ionosphere. It supposed that oblique Alfven waves frequency range are downgoing from magnetosphere and horizontal ionospheric conductivity are created by upgoing atmospheric gravity seismic source. Unlike companion paper Molchanov et al. (2003), we used simple model layer but took into consideration lateral inhomogeneity perturbation region shown could be essentially decreased for frequencies f = 0.001-0.1 Hz at nighttime change negligible daytime coincidence with observational results.