Figure 4From: Characteristics of dilatational infrasonic pulses accompanying low-frequency earthquakes at Miyakejima Volcano, JapanVertical-component seismograms (a-c) of earthquakes observed at station V.MKJA and infrasonic record obtained at station V.MYYA (d). High-frequency noise caused by ground motion is superimposed on the infrasonic records before the onset of the infrasonic pulse, which is shown by the arrow.Back to article page