Global Seismographic Network

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Presentation transcript:

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 Autonomous Geophysical Observatories (AGOs) should all have broadband seismometers New GSN/FDSN Sites at Year-Round Antarctic Bases

ACES

SPRESSO South Pole Remote Earth Science and Seismological Observatory

SPRESSO Installation 2001-2003

QSPA: Quiet-sector South Pole, Antarctica

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

Crystal Prism

Crystal LASA

AMANDA Figures Courtesy of AMANDA Project

IceCube 80 Strings 4800 PMT Instrumented volume: 1 km3 (1 Gton) AMANDA South Pole IceTop Runway 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

CRYSTAL TELLUSCOPE (from tellus, Latin for Earth) 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

Dynamo

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