A special mechanism for some Antarctic earthquakes
- 1 December 1962
- journal article
- research article
- Published by Taylor & Francis in New Zealand Journal of Geology and Geophysics
- Vol. 5 (5) , 864-873
- https://doi.org/10.1080/00288306.1962.10417642
Abstract
Frequent small earthquakes recorded at Scott Base constitute the main seismic activity so far discovered within Antarctica. Prominent in many Scott Base seismograms is a sinusoidal wave of period 1½-2 sec with an onset velocity of about 650 m/sec; this has been interpreted as an air-coupled wave associated with flexural waves in the Ross Ice Shelf. Other unusual features of the earthquakes also suggest that they are caused by fractures in the ice near the shelf edge, leading to the calving of icebergs.Keywords
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