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Relation between surface dynamics and remote sensor InSAR results over the Metropolitan Area of San Salvador

Author

Listed:
  • José Alexander Chavez Hernandez

    (Oficina de Planificación del Área Metropolitana de San Salvador (OPAMSS))

  • Milan Lazecký

    (IT4Innovations, VSB-TU Ostrava)

  • Jiří Šebesta

    (Czech Geological Survey)

  • Matúš Bakoň

    (University of Presov)

Abstract

InSAR information to record dynamic changes on the surface using remote sensor has been obtained for the Metropolitan Area of San Salvador and compared with surface dynamic situation and fixed GPS surface movement information. The city is located in an active tectonic depression between the tectonic remains of ancient volcanoes and active volcanic centers. This area has been historically affected by earthquakes, volcanic activity, erosion, mass movements, and flooding. The morphology of the area has been changed by human activities, most of the time without any respect to natural processes thus increasing the problems. There are sectors that show subsidence close to Ilopango Caldera that could be connected to diastrophic block tectonic movements connected to post-seismic episodes after 2012 earthquake, and aquifer level changes due effects of climate change and overexploitation of aquifers. These movements may increase the huge problems of erosion and mass wasting through las Cañas basin. In addition, after 2017 seismic swarm a horizontal movement was recorded with the satellite radar interferometry (InSAR) in two areas, which reflects the possible movement of faults that crosses the area of study. This type of information provides important data for the decision-making of land, protection and mitigation zones, monitoring of governmental institutions, and for regional planning.

Suggested Citation

  • José Alexander Chavez Hernandez & Milan Lazecký & Jiří Šebesta & Matúš Bakoň, 2020. "Relation between surface dynamics and remote sensor InSAR results over the Metropolitan Area of San Salvador," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 103(3), pages 3661-3682, September.
    • Handle: RePEc:spr:nathaz:v:103:y:2020:i:3:d:10.1007_s11069-020-04150-1
    DOI: 10.1007/s11069-020-04150-1
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    References listed on IDEAS

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    1. José Chávez Hernandez & Jiři Šebesta & Lubomir Kopecky & Reynaldo Landaverde, 2014. "Application of geomorphologic knowledge for erosion hazard mapping," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 71(3), pages 1323-1354, April.
    2. J. Saxby & J. Gottsmann & K. Cashman & E. Gutiérrez, 2016. "Magma storage in a strike-slip caldera," Nature Communications, Nature, vol. 7(1), pages 1-10, November.
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    Cited by:

    1. Salman Ahmadi & Reza Soodmand Afshar & Mohammad Fathollahy & Kamran Nobakht Vakili, 2023. "Identification of land subsidence hazard in asadabad plain using the PS-InSAR method and its relationship with the geological characteristics," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 117(1), pages 1157-1178, May.
    2. Walter Salazar, 2021. "Interoccurrence times and seismic hazard for upper-crustal volcanic chain earthquakes in El Salvador: are they Poissonian distributed?," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 107(2), pages 1443-1465, June.

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