Post on 29-Jan-2016
The existing and upgrading The existing and upgrading national seismological national seismological network in vietnamnetwork in vietnam
Le Tu Son Le Tu Son Institute of Geophysics, VAST Vietnam
Vietnam Vietnam seismological seismological network network composes of 24 composes of 24 short-period short-period stations (an stations (an telemetry array telemetry array with 9 station with 9 station and 15 and 15 autonomous autonomous stations). stations).
Transmission systemTransmission system
Recording SystemRecording System
Autonomous stationAutonomous station
Telemetry Telemetry stationstation
Recording system at the centerRecording system at the center
The specifications of the The specifications of the seismological networkseismological network
Seismometer:Seismometer: Mark Product 1Hz LC-3D; Mark Product 1Hz LC-3D; Sensitivity:Sensitivity: 176/V/M/S176/V/M/S
Damping Damping 0.70.7 Amplifier GainAmplifier Gain 64 (2^6) *64 (2^6) * Digitizer 15 bit for 10 VoltDigitizer 15 bit for 10 Volt 0.305 mV/count0.305 mV/count Filter:Filter: Cutof freq.Cutof freq. 24 Hz24 Hz Butt. FilterButt. Filter 5 poles5 poles High-passHigh-pass 0.1 Hz0.1 Hz -1 pole-1 pole
Data processing: Data processing: SEISAN softerwareSEISAN softerware
An example of the An example of the seismic records seismic records from Vietnam from Vietnam seismological seismological network (the network (the event of M=5.3 in event of M=5.3 in Dienbien city, Dienbien city, 19/02/2001). All of 19/02/2001). All of the seismic the seismic records are digital records are digital
24 Taiwan portable broadband 24 Taiwan portable broadband seismic array in northern Vietnam.seismic array in northern Vietnam.
STS-2/Trillium 40 + Q330STS-2/Trillium 40 + Q330
ProjectProject
Improvement of National Improvement of National Seismic Network for Seismic Network for
Earthquake informing and Earthquake informing and Tsunami warningTsunami warning
Institute of Geophysics
Distribution of Distribution of proposal proposal seismic seismic
network network The distance The distance
between stations between stations from 100 km to from 100 km to 200 km.200 km.
36 stations on the 36 stations on the whole countrywhole country
Real time workingReal time working
Seismic monitoring networkSeismic monitoring network
System configuration of each System configuration of each seismic stationseismic station
AIME OF THE SEISMIC SYSTEMAIME OF THE SEISMIC SYSTEM
• DETECT EQ AND LOCATE EQ MAG 3.5 DETECT EQ AND LOCATE EQ MAG 3.5 THAT OCCURR IN THE WHOLE COUNTRY THAT OCCURR IN THE WHOLE COUNTRY
• DETECT EQ AND LOCATE EQ MAG 6.5 DETECT EQ AND LOCATE EQ MAG 6.5 THAT OCCURR IN THE SOUTH CHINA SEATHAT OCCURR IN THE SOUTH CHINA SEA
• REDUCE THE TIME OF DATA REDUCE THE TIME OF DATA PROCESSINGPROCESSING
BMG
Thank you for your attention!Thank you for your attention!