Table 1 Summary of the infrasound sources
From: Experiment to distinguish two fumaroles consistently emanating infrasound at Kirishima Iwo-Yama
ISC fumarole | IWC fumarole | Noise | |
|---|---|---|---|
Distance from the array (m) | 150 | 300 | – |
Distance from the SI microphone (m) | 450 | 15 | – |
Peak value of the array CC | 0.80 | – | – |
Peak value of the SI-array CC | 0.13 | 0.01 | – |
Monopole source amplitude (at 1 m) (Pa) | 3 | 0.2 | – |
RMS amplitude at the array (Pa) | 0.0200 | 0.0007 | 0.0223 |
RMS amplitude at the SI microphone (Pa) | 0.0067 | 0.0140 | 0.0257 |
Power fractions at the array (%) | 44.4 | 0.1 | 55.5 |
Power fractions at the SI microphone (%) | 5.0 | 21.8 | 73.2 |