1. The existing and upgrading national seismological network in vietnam Le Tu Son Le Tu Son Institute of Geophysics, VAST Vietnam

2. Vietnam seismological network composes of 24 short-period stations (an telemetry array with 9 station and 15 autonomous stations). Vietnam seismological network composes of 24 short-period stations (an telemetry array with 9 station and 15 autonomous stations).

3. Transmission system

4. Recording System

5. Autonomous station

7. Telemetry station Telemetry station

8. Recording system at the center

9. The specifications of the seismological network Seismometer:Mark Product 1Hz LC-3D; Sensitivity:176/V/M/S Seismometer:Mark Product 1Hz LC-3D; Sensitivity:176/V/M/S Damping 0.7 Damping 0.7 Amplifier Gain64 (2^6) * Amplifier Gain64 (2^6) * Digitizer 15 bit for 10 Volt Digitizer 15 bit for 10 Volt 0.305 mV/count 0.305 mV/count Filter: Filter: Cutof freq.24 Hz Cutof freq.24 Hz Butt. Filter5 poles Butt. Filter5 poles High-pass0.1 Hz High-pass0.1 Hz -1 pole -1 pole

10. Data processing: SEISAN softerware An example of the seismic records from Vietnam seismological network (the event of M=5.3 in Dienbien city, 19/02/2001). All of the seismic records are digital An example of the seismic records from Vietnam seismological network (the event of M=5.3 in Dienbien city, 19/02/2001). All of the seismic records are digital

11. 24 Taiwan portable broadband seismic array in northern Vietnam.

12. STS-2/Trillium 40 + Q330

13. Project Improvement of National Seismic Network for Earthquake informing and Tsunami warning Institute of Geophysics

14. Distribution of proposal seismic network The distance between stations from 100 km to 200 km. The distance between stations from 100 km to 200 km. 36 stations on the whole country 36 stations on the whole country Real time working Real time working

15. Seismic monitoring network

16. System configuration of each seismic station

17. AIME OF THE SEISMIC SYSTEM DETECT EQ AND LOCATE EQ MAG 3.5 THAT OCCURR IN THE WHOLE COUNTRYDETECT EQ AND LOCATE EQ MAG 3.5 THAT OCCURR IN THE WHOLE COUNTRY DETECT EQ AND LOCATE EQ MAG 6.5 THAT OCCURR IN THE SOUTH CHINA SEADETECT EQ AND LOCATE EQ MAG 6.5 THAT OCCURR IN THE SOUTH CHINA SEA REDUCE THE TIME OF DATA PROCESSINGREDUCE THE TIME OF DATA PROCESSING BMG

18. Thank you for your attention!