Current status of realtime seismic network in and around Japanese Islands Japan Agnecy for Marine-Earth Science and Technology Seiji Tsuboi.

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Presentation transcript:

Current status of realtime seismic network in and around Japanese Islands Japan Agnecy for Marine-Earth Science and Technology Seiji Tsuboi

Seismological stations in Japan After 1995 Kobe earthquake, installation of stations has been accelerated. As of 2011; ・ 1235 short period 3 component seismometer ・ 125 broadband 3 component seismometer ・ 3721 strong motion seismometer ・ 1466 GPS stations Most of these are connected in realtime

Realtime data transmission through IP-VPN 100Hz sampling rate digital seismograms from more than 800 seismic stations are transmitted in realtime Win format is used Duality of transmission is secured (UDP and IP) Delay time should be less than 1 second and quality should be 99%. Data are used to locate earthquake hypocenter and issue earthquake early warnings

Earthquake Early Warning by JMA

20 ocean bottom observatories will be installed in future To-Nankai earthquake rupture area. Type of instruments: ■ Strong Motion Seismometer ： Metrozet TSA-100S ■ Broadband seismometer ： Guralp CMG-3TRH ■ Hydrophone ： High Tech HTI-99-DY ■ Differential Pressure Gauge ： Nichiyu Giken Kogyo MA ■ Quartz Crystal Pressure Gauge ： Paro Scientific 8B ■ Precision Thermometer ： Nichiyu Giken Kogyo MA series

Peak Performance/ CPU 102.4GflopsTotal number of CPU 1280 Peak Performance/ PN 819.2GflopsTotal number of PN 160 Shared memory/PN 128GbytesTotal peak performance 131Tflops CPUs/PN8Total main memory 20Tbytes Earth Simultor 2 The new Earth Simulator system, which began operation in March 2009, achieved sustained performance of TFLOPS and computing efficiency of 93.38% on the LINPACK Benchmark

Next Generation Supercomputer Project The system will use scalar CPUs (SPARC64™ VIIIfx, 8 cores, 128 gigaflops) manufactured with 45nm process technology. The network between the computing nodes will consist of a direct-connection network. With its water cooling system, the supercomputer will maintain a low temperature in the CPU and other LSIs, minimizing the failure rate and reducing power consumption. Max. performance 10 Petaflops Completion planned for 2012

Next Generation Supercomputer Project

High precision simulation of earthquake and tsunamis

Simulation of strong ground motion

Simulation of tsunamis

Simuation of seismic hazard in the cities