Current status of realtime seismic network in and around Japanese Islands Japan Agnecy for...
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Transcript of Current status of realtime seismic network in and around Japanese Islands Japan Agnecy for...
Current status of realtime seismic network in and around Japanese
IslandsJapan Agnecy for Marine-Earth
Science and TechnologySeiji 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 stationsMost 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 usedDuality 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-567000 ■Quartz Crystal Pressure Gauge : Paro Scientific 8B7000-2-005 ■Precision Thermometer : Nichiyu Giken Kogyo MA-565-2 series
Peak Performance/CPU
102.4Gflops Total number of CPU
1280
Peak Performance/PN
819.2Gflops Total number of PN
160
Shared memory/PN
128Gbytes Total peak performance
131Tflops
CPUs/PN 8 Total main memory
20Tbytes
Earth Simultor 2
The new Earth Simulator system, which began operation in March 2009, achieved sustained performance of 122.4 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