Automatic system for post-earthquake evaluation of city damage in Bogota

The Laboratory of Automatic Seismic Instrumentation (LISA) was established with the aim of bolstering the management of seismic risk in Bogotá, particularly regarding emergency response, given that it provides key information for the proper allocation of physical and human resources in an earthquake crisis. The system performs a continuous and on-line monitoring of Bogotá’s Accelerograph Network where ground motion is recorded at rock level when an earthquake occurs. The recorded signal is sent via telemetry to the central data repository of the District’s Institute for Risk Management and Climate Change, IDIGER, where LISA, after validating the signal as a real seismic event, models the one-dimensional dynamic response of the city soils to generate maps showing the distribution of strong motion intensities (in terms of PGA and spectral accelerations among others). Immediately afterwards the system determines the expected damage for each asset in the city, as well as the probability of collapse and the probable number of deceased and injured people. The results are reported to e-mail accounts and phone numbers of city authorities and registered users within minutes of the event, where the report contain general damage values and maps with neighborhood and block resolution.  

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