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Session: Cryoseismology [Poster]

Type: Poster

Date: 10/14/2025

Time: 05:00 PM

Room: Crystal Ballroom

The U.S. government has operated a seismometer at South Pole, Antarctica (SPA) since the construction of Amundsen-Scott station in 1957. The current station (QSPA, installed in 2002) has been widely utilized for the detection and location of global earthquakes and nuclear explosions, studies of swell activity and sea ice around Antarctica, and cryoseismology. However, long-period (> 40 s) noise levels compromise ambient ground motion observations on all three of the station’s borehole broadband seismometers. These high noise levels arise from both instrument self-noise and susceptibility to magnetic field variations, ultimately compromising the ability to make unique normal mode and tidal loading observations at the rotation axis of Earth. To improve long-period seismic observations at the South Pole, the U.S. Geological Survey is collaborating with the IceCube Neutrino Observatory to install a Nanometrics Trillium 360 GSN seismometer at 2.4 km depth within the Antarctic icecap. This presentation will discuss the development and testing of the technology to emplace a sensor at such depths within a water column before being subsequently frozen in place. This will include an overview of drilling technology used within IceCube, the pressure vessel design to house the seismometer and digitizer, and software and hardware solutions to communicate with the digitizer and provide it with accurate Coordinated Universal Timing information over a single twisted wire pair. The seismometer is scheduled for deployment in December of 2025 and, if successful, would be the deepest known broadband seismometer installation in the world and would occupy a unique and critical location on the planet for earthquake monitoring and deep Earth imaging.

Presenting Author: Robert

Additional Authors

Robert E Anthony

Presenting Author Corresponding Author

reanthony@usgs.gov

U.S. Geological Survey, Albuquerque, New Mexico, United States

Michael DuVernois

duvernois@icecube.wisc.edu

University of Wisconsin–Madison, Madison, Wisconsin, United States

Jeff Weber

jweber@icecube.wisc.edu

University of Wisconsin–Madison, Madison, Wisconsin, United States

Perry Sandstrom

perry.sandstrom@icecube.wisc.edu

University of Wisconsin–Madison, Madison, Wisconsin, United States

Skyler L Grulke

sgrulke@wisc.edu

University of Wisconsin–Madison, Madison, Wisconsin, United States

Richard C Aster

rick.aster@colostate.edu

Colorado State University, Fort Collins, Colorado, United States

Geoffrey Bainbridge

geoffreybainbridge@nanometrics.ca

Nanometrics Inc., Kanata, Ontario, Canada

Patrick C Bastien

pbastien@usgs.gov

U.S. Geological Survey, Albuquerque, New Mexico, United States

Jim Braun

jbraun@icecube.wisc.edu

University of Wisconsin–Madison, Madison, Wisconsin, United States

Jeff Cherwinka

jcherwinka@psl.wisc.edu

University of Wisconsin–Madison, Madison, Wisconsin, United States

Edward Kromer

ekromer@contractor.usgs.gov

KBR-ASL, Albuquerque, New Mexico, United States

Adam T Ringler

aringler@usgs.gov

U.S. Geological Survey, Albuquerque, New Mexico, United States

Vernon Stoup

vstoup@contractor.usgs.gov

KBR-ASL, Albuquerque, New Mexico, United States

Greg C Tanner

gtanner@usgs.gov

U.S. Geological Survey, Albuquerque, New Mexico, United States

Thomas A Telesha

ttelesha@usgs.gov

U.S. Geological Survey, Golden, Colorado, United States

Neil Trerice

neiltrerice@nanometrics.ca

Nanometrics Inc., Kanata, Ontario, Canada

David C Wilson

dwilson@usgs.gov

U.S. Geological Survey, Albuquerque, New Mexico, United States

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