Fig. 8
From: Monochromatic infrasound waves observed during the 2014–2015 eruption of Aso volcano, Japan
Snapshots of the pressure distribution with different conduit lengths. a Simple source time functions used in our FDTD calculations. b–f Snapshots of pressure distribution at 3.0 s after the initiation of the 0.78-s width pulse. The conduit lengths are 0 m, 50 m, 100 m, 150 m, and 200 m in b–f respectively. Red and blue colors represent positive and negative pressures, respectively