Cuban Seismic Network National Centre for Seismological Research (2010) Ing. Eduardo R. Diez Zaldívar. Centro Nacional de Investigaciones Sismológicas.

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Presentation transcript:

Cuban Seismic Network National Centre for Seismological Research (2010) Ing. Eduardo R. Diez Zaldívar. Centro Nacional de Investigaciones Sismológicas. CENAIS. Ministerio de Ciencia, Tecnología y Medio Ambiente. CITMA. CUBA.

Cuba is part of the North American plate and lies on its boundary with the Caribbean one,

The beginning of the known seismic history of Cuba came with the Spanish settlements in the XVI century, and since that time several major and large earthquakes are reported in Greater Antilles. 7 earthquakes with VIII degrees and 2 with IX degrees. In the last five centuries, the eastern Cuban territory was affected by 26 earthquakes with intensity VI degrees or more, the most importance’s where 17 with VII degrees, 7 earthquakes with VIII degrees and 2 with IX degrees.

During May and June, 2010, was installed new equipments acquired in the People Republic of China. Mainly, was kept the idea of one national broad band network (7 stations), with 120 and 60 seconds BB seismometers, in order to record not only a local seismicity but also regional and tele- seismic earthquakes. Also, a short period radio telemetric network was installed for more specific studies with local seismicity and in the stations close to main fault system, in addiction with seismometer, we connected some strong motion accelerometers.

The new networks are connected to the central station using ADSL modems, radio telemetry and some satellite links, depending of connectivity, topography, distances and INTERNET facilities.

With automatic phase pick-up software and on-line epicenter location with magnitude calculation, it is possible to offer fast results with information about the energetic-spatially earthquake parameters. Also, all stations will be, in the next future, full open for data interchange, in order to collaborate with scientific and research institutions from neighboring countries. Short period radio telemetric network

1. Broad band stations.

BBVS60 and BBVS120 Seismometers (similar to REFTEK “Observer” model and ).

Dynamic range and frequency response of BBVS60 (top) and BBVS120 (botton).

Accelerometer BBAS-2 (Strong motion).

EDAS-24IP, 3 or 6 channel datalogger with 24 bits dynamic range, GPS time, TCP-IP protocol support, 8 Gbytes internal storage capacity and LINUX inside.

MGV, CCC and SOR Broad band stations

2. Short period network.

Short period seismometer FSS-3M Frequency and phase response.

SAB, RCC and PIN Short period stations

Include WINDOWS server, SCO UNIX open server and database- interchange server.

General idea for server interactions.

 Real-Time Data Processing System  Interactive Data Analysis Software  Strong Motion Data Analysis Software  Data Exchange Server  Real-Time Monitor System  Seismic Data Manage System

Two main acquisition software, one in WINDOWS, another in SCO (duplicate). Windows acquisition software. SCO UNIX acquisition software.

Used for analysis the seismic data and locate the earthquake Main Function: Read the data file recorded by the Real-Time Data Processing System and display the wave data. Pick the phase. Locate earthquake and display the hypocenter on the map. Data process: Filter, Emulating data to Wood-Anderson seismometer record. Convert the data file to SAC or SEED file format. Operating System: SCO Open Server 6.0 Windows XP/2003 Server/VISTA 2. Interactive Data Analysis Software.

Interactive analysis software EDSP-IAS for earthquake analysis.

Epicenter location and earthquake parameter calculation using EDSP-IAS software.

Used for analysis the strong motion acceleration data. Main Function: Read the strong motion acceleration data file recorded by the Real-time Data Processing System. Data Process: Data correction. Compute the velocity and the displacement data with the acceleration data. Compute the time duration and PGA. Filter. Compute the noise-signal spectrum. Spectral processing for acceleration, velocity and displacement data. Response spectrum for acceleration, velocity and displacement data. Calculate intensity. Print graph. Save as the wave data or spectrum to another file. 3. Strong Motion Data Analysis Software.

Acceleration record Response Spectrum for acceleration

Main Function: Realize the data share between the subsystem or the seismic network real-timely. The shared data includes : Real-time wave data. Seismic information. Digital seismic station running status. Software running status. Network communication status. 4. Data exchange Server.

THANK YOU!!!