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Official Journal of the Asia Oceania Geosciences Society (AOGS)

Geoscience Letters Cover Image

Table 2 Modified results from the CTBTO Reference Event Bulletin (REB) for the Sangeang Api eruption

From: Processing of volcano infrasound using film sound audio post-production techniques to improve signal detection via array processing

Station Distance (°) Observed arrival time (UTC) Back azimuth observed Azimuth residual Slowness/celerity (m/s)
I07AU 18.41 09:38:55.675 303.5 − 5.3 313.4
I39PW 21.10 10:10:00.000 219.8 − 4.2 288.8
I06AU 23.16 10:22:07.962 79.6 − 1.9 176
I04AU 26.84 10:38:45.000 7.5 − 0.4 308.8
I05AU 42.29 12:05:06.100  
  1. Note that the arrival detected for I06AU is outside the reasonable celerity/slowness range of 250–450 m/s whereas with the methods with an arrival at around 10:03 UTC the celerity for this event would be around 320 m/s