See Sketch by Bobbie Myers, USGS.
"On my last visit a casarina tree which had been well above high water mark was particularly noticeable as being about twelve inches below water level, and the shore line seemed to have tilted. For the reasons I stated that I did not consider the island suitable for a Quarantine Station on account of the danger of its possible sudden subsidence, a statement trewatered with some levity by my companions, but having had personal experience with volcanic eruptions in other parts of the world I know that it was no joke. My final remark was 'it came up in a night and might go down in a night and I would suggest that life buoys be hung round the verandah rails of the buildings where they would at least be ornamental, but would not be required if the island went up instead of down'."
George H. Murray (1939), in a discussion of the 1937 eruption of Vulcan, Rabaul Caldera, Papua New Guinea.