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90°S

90°S. Global Seismographic Network and Antarctica G-90-S Rhett Butler. • Seismology since the IGY • GSN since 1988. GSN MAP. POLAR SEISMIC COVERAGE. GSN + FDSN. Northern. Southern. 10° Radii Circles. More Southern Polar Coverage Needed.

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90°S

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  1. 90°S Global Seismographic Network and Antarctica G-90-S Rhett Butler • Seismology since the IGY • GSN since 1988

  2. GSN MAP

  3. POLAR SEISMIC COVERAGE GSN + FDSN Northern Southern 10° Radii Circles

  4. More Southern Polar Coverage Needed • Autonomous Geophysical Observatories(AGOs) should all have broadband seismometers • New GSN/FDSN Sites at Year-Round Antarctic Bases

  5. ACES

  6. SPRESSOSouth Pole Remote Earth Science and Seismological Observatory

  7. SPRESSO Installation 2001-2003

  8. QSPA: Quiet-sector South Pole, Antarctica

  9. Infrastructure Available at SPRESSO • Quiet sector is established and truly quiet • Fiber-optic link to South Pole Station • 4500 KVA Power Available, 1% used • Extraordinary NSF Infrastructure at Pole

  10. Crystal Prism

  11. Crystal LASA

  12. AMANDA Figures Courtesy of AMANDA Project

  13. IceTop AMANDA South Pole Runway 1400 m 2400 m IceCube • 80 Strings • 4800 PMT • Instrumented volume: 1 km3 (1 Gton) • IceCube is designed to detect neutrinos of all flavors at energies from 107 eV (SN) to 1020 eV Figure Courtesy of AMANDA/IceCube Project

  14. CRYSTAL TELLUSCOPE(from tellus, Latin forEarth) • 2004-5 Test Remote RF Telemetry and Cold (-55°C) Guralp Seismometer • 2005-7 Develop and Deploy Test String • 2007-9 Deploy Inner 3-D Prism and First Ring • 2009-11 Deploy Outer Rings via AGOs

  15. Dynamo

  16. Polar Science • Nanoearthquakes and Icequakes near the South Pole • Axis-symmetric Earth Structure • Inner Core • Outer Core Convection • Core-Mantle Boundary

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