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Deterministic Seismic Hazard Scenarios in the City of Managua (Nicaragua) in the Framework of the Kuk Ahpan Project

Description: 

During the last years, several shallow crustal seismic sources (h< 15 km) have been proposed in Nicaragua, some of them with high influence in the seismic hazard in the capital, Managua. Here we present several seismic scenarios related with the main crustal faults in the nearby of the city. We have characterized the corresponding hazard scenarios in a deterministic way, giving the peak ground accelerations (PGA) including local site effects. Firstly, the critical ruptura scenarios have been identified with earthquakes in the faults: Estadio, Tiscapa, Aeropuerto and Cofradía, with a range of magnitudes Mw between 6 and 7.
On a second step, the corresponding ground motions have been simulated on rock conditions. Then, we have compiled information about soils classes in the city area, from different sources and we elaborated a micro zonation map of the city. In a third phase we estimated the ground motion including local effects by use of the amplification factors defined by "Norma Sismorresistente para la Ciudad de Managua" (MTI, 2022). The obtained results are ground motion maps for the three scenarios, together with response spectra in different soil conditions. These results are compared with those provided by the seismic code for Managua in order to evaluate if the design spectra of the code are (or not) conservative, in the case of these critical scenarios would take place.

Session: Advances in Probabilistic Seismic Hazard Analysis and Applications [Poster]

Type: Poster

Date: 4/20/2023

Presentation Time: 08:00 AM (local time)

Presenting Author: María Belén Benito Oterino

Student Presenter: Yes

Invited Presentation: 

Authors