SELENA is short for SEismic Loss EstimatioN using a logic tree Approach. Each year, SELENA undergoes constant developments to incorporate the latest state-of-the-art as well as requests from users.

Since then, SELENA has undergone constant further developments in order to incorporate the latest state-of-the-art as well as requests from users. The main idea behind SELENA is to provide an earthquake loss estimates (ELE) tool that is open to any user-defined input and thus can be applied to any part of the world.

Used worldwide

Since the first version of SELENA was released in 2004, the software has been applied by a large number of students, researchers and practitioners in many parts of the world.

Countries and regions where SELENA has been applied since its first release in 2004.

Countries and regions where SELENA has been applied since its first release in 2004.

SELENA is a stand-alone application that is not tied to any particular GIS, adding versatility to the software, so that it can be used across operating systems and platforms. In order to make users more comfortable and to make the whole computation process as transparent as possible, all input files required by SELENA and the generated output files are in plain ASCII text format. This allows users to use their favourite GIS for displaying the results. SELENA’s source code is freely distributable under the terms of the GNU General Public License (GPL).

Three analysis types

SELENA allows for three analysis types which differ in the way the seismic impact is described: (1) deterministic analysis; (2) probabilistic analysis; and (3) real-time ground motion data. In general, spectral ordinates of seismic ground motion at different reference periods have to be provided for each geographical unit (i.e., census tract), in order to allow the construction of a design spectra following a selectable seismic code provision.

Loss outputs

Once the seismic ground motion in each geographic unit is defined, the computation of physical damage to the building stock is computed by the application one of the selectable Capacity Spectrum-based methods. Based upon the damage estimates, total economic losses related to these damages and the number of casualties, i.e., the number of injured people and fatalities is conducted. Additional loss outputs are shelter demands (temporary housing) as well as debris estimates. Damage results are given in terms of cumulative probabilities of being in or exceeding one particular damage state following the classification scheme given by HAZUS-MH into none, Slight, Moderate, Extensive and Complete damage.

Schema SELENA

Principle flowchart of a SELENA in order to derive the various hazard (seismic ground motion), damage and loss estimates for a certain study area.

The figure bellow illustrates an application example of risk (damage and economic loss) assessment that was carried out using SELENA for Santiago de Cuba, second largest city of Cuba and capital of Santiago de Cuba province.

ALT

ALT

SELENA provides damage and loss estimates on the level of geographical units. The figures illustrate predicted distributions of damage (disaggregated by damage state) and economic losses for a deterministic earthquake scenario in close proximity to the city of Santiago de Cuba, Cuba.