Fig. 2From: Detecting pre-eruptive magmatic processes of the 2018 eruption at Kilauea, Hawaii volcano with ambient noise interferometryAmplitude spectrum of raw seismic records for selected stations. a Station UWE. b Station DEVL. c Station STCD. d Station JOKA. Station locations are shown in Fig. 1. Black dashed line indicates the eruption time. Black boxes denote the frequency bands used in the studyBack to article page