Seismic Activity in the Transantarctic Mountains - Results from a Broadband Array Deployment

Abstract

Seismic events have been recorded in the Transantarctic Mountains using a temporary 10-station broadband seismometer array. About 50% of a total of 160 events were located to the north of the array, in the vicinity of the David Glacier, inland from the Drygalski Ice Tongue, while 40% were located near the transition between the Mulock glacier and the Ross Ice Shelf, just south of the Skelton glacier. The northern events are roughly aligned in a ESE-WNW direction, sub-parallel to faults which are postulated to lie near to the events, and close to the postulated David glacier lineament. The events may be associated with deep-seated faulting along the lineament, although alternative source mechanisms involving ice movement are also possible.