All files are in AIFF format used by Macintosh. As the files have considerable dynamic range and much low frequency, computer speakers don't do it justice. Connecting a good speaker to your computer is strongly recommended. Note that nearly all (volcanic) sounds have a sharp first arrival followed 0.8 sec later by a lower frequency more dispersed arrival. The first is thought to be a direct arrival from the source and the second a reflection off the ocean surface. If so, the source of these events is about 2 km from the HUGO Junction Box.
| Event File | Size | Event |
|---|---|---|
| A-10/10/97#25,28_low_f | 839 K | Several low frequency volcanic "shots" |
| B-10/10/97#20_low_f | 452 K | Several low frequency volcanic "shots") |
| C-10/10/97#42-44_shots | 774 K | Several volcanic "shots" some high freq |
| D-10/11/97#40_roar | 1.4 MB | major roar with many pops |
| E-10/10/97_All_hell_roar | 5 MB | "All Hell" roar - very low frequency roar with many pops and bangs accompanied by hiss |
| F-10/11/97#41_echo_events | 516 K | high freq shots with several echos |
| G-10/11/97#2-4_vhf_events | 710 K | high freq shots |
| H-10/11/97#27_pops | 774 K | volcanic pops |
| I-10/11/97# 32,35_shots | 516 K | mixed frequency shots |
| J-10/21/97#1-35-vlf | 194 K | very low frequency acoustic event |
| K-10/21/97#1#39,40_pops | 5.3 MB | series of volcanic "pops" |
| L-10/21/97#1#43_ROAR | 3.8 MB | roar/hiss event |
| M-10/21/98#2-1,2_huge | 516 K | HUGE event |
| N-10/21/98#2#22_huge | 645 K | HUGE event |
| O-10/21/97#2#28_woof | 581 K | series of low freqency chirps - volcanic? |
| P-2/19/98_THRUSTERS | 581 K | sound of submersible thrusters near HUGO--can hear ship on surface in background |
| Q-1/19/98_MOD_VOICE | 1.3 MB | voice as heard on the HUGO hydrophone before being demodulated (single side band 10 Khz carrier) |
| R-1/19/98_VOICE | 2.7 MB | Voice of Submersible pilot as heard on shore through HUGO hydrophone. Voice is on a 10 Khz carrier demodulated on shore. Can hear ship's reply weakly. |
| S-2/2/98_EWING_distant | 1.5 MB | R/V M. EWING shooting air guns 18 sec apart about 30 miles away |
| T-2/2/98_EWING_OVER | 1.3 MB | EWING shots directly over HUGO - can hear 3.5 Khz at 2 sec rep rate also |
| U-humpback_serenade | 1.1 MB | selected Humpback songs from four hours of continuous singing recorded 2/18/98 |
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Page last modified on: 30 May 1998