Fig. 2From: Sensitivity of ionosonde detection of atmospheric disturbances induced by seismic Rayleigh waves at different latitudesIonospheric disturbance caused by M7.7 aftershock of 2011 Tohoku-Oki earthquake. a Ionogram showing multiple cusp signature observed at Yamagawa (epicentral distance 1124 km), Japan, and b seismogram observed at Tashiro (epicentral distance 1101 km), JapanBack to article page