Project Title

Pilot fiber seismic networks at the Amundsen-Scott South Pole Station

Summary

Event Number:
A-137-S
NSF / OPP Award 2022920

Program Director:
Dr. Vladimir Papitashvili

ASC POC/Implementer:
John Rand / Sheryl Seagraves

Principal Investigator(s)

Mr. Zhongwen Zhan
zwzhan@caltech.edu
California Institute of Technology
Pasadena, California

Location

Supporting Stations: South Pole Station
Research Locations: South Pole Station, B2 Laboratory

Description

This project has deployed a distributed acoustic sensing (DAS) system at the Amundsen-Scott South Pole Station. DAS is an emerging technology that transforms a single optical fiber into a massively multichannel seismic array and provides a scalable and affordable way to deploy a dense seismic network. This project has converted 8 km of existing fiber optic cable into more than 8,000 sensors to explore the potential of DAS as a breakthrough data engine for polar seismology. The currently deployed array is collecting data for the purposes of: 1) evaluation and calibration of the performance of the DAS technology in the extreme cold, very low noise (including during the exceptionally quiet austral winter) polar plateau environment; 2) recording and analysis of local ambient and transient signals from ice, anthropogenic signals, ocean microseism, atmospheric and other processes, as well as to study local, regional, and teleseismic tectonic events; and 3) structural imaging of the firn, glacial ice, glacial bed, crust, and mantle, variously using active sources, ambient seismic noise, and natural icequake and earthquake events.

Field Season Overview

This is the final season for the DAS project. The system will be dismantled and retrograded at the end of the summer. Retrograde activities will be performed by Antarctic Support Contract personnel.