Geologic Background:
A submarine volcano detected by underwater
noises on hydrophones. The summit of this seamount rises
to within 140 meters of the surface.
Historic Activity:
- At least 4 eruptions have been heard but not seen
between 1958 and 1970.
Recent Activity:
- From June to August 1986, submarine activity was
indicated by hydrophone noise and the presence of
discolored water.
- During a 1992 cruise, gas bubbles were detected
acoustically, rising from the crest of Rumble III.
Data Sources:
- Smithsonian's SEAN Bulletin (V. 11, No. 7)
- Global Volcanism Network (V.15, No. 3 and V. 17, No.
6).
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