Fig. 8From: New aspects of the upper atmospheric disturbances caused by the explosive eruption of the 2022 Hunga Tonga–Hunga Ha’apai volcanoHigh-pass filtered Y component of the geomagnetic field at Apia, Honolulu, and Pamatai with a cut-off frequency of ~ 0.8 mHz. The green boxes indicate the time interval where the waveform of ΔY at Honolulu is similar to that at Apia (Yamazaki et al. 2022)Back to article page