Action 1.4 : Identification of the suspicious faults in the areas with low to moderate seismicity

Assessment of active faults in the areas with low seismicity

Subject matter

The objective of the action 1.4 is developing procedures for identification and parametrization of the potentially seismogenic faults in the areas with low seismicity and examination of these procedures on an example of the Bohemian Massif. Results of this action will include database of faults and recommendations for its application in the seismotectonic models for PSHA.

Motivation

Seismotectonic models are key inputs to the PSHA. Our knowledge on the faults in regions with low seismicity and strain rates is typically limited by large uncertainties which become crucial when relating to faults in proximity of the NPPs. In such environments the identification of active faults and their parametrization is difficult and often poorly constrained. Effort should be made to improve and unify the methodical approaches used for the fault assessment.

Bohemian

Working plan

  1. Development of the Database of active faults for the Bohemian Massif
  2. Development of “Guidelines” for detecting active and potentially seismogenic faults in the areas with low seismicity and characterization of zones with diffuse seismicity
  3. Implementation of the above mentioned principles into PSHA
  4. Research on missing parameters of potentially seismogenic faults

Outcomes

  • Report and Webpage on the Database of active faults for the Bohemian Massif. Fault and earthquake databases are planned to be presented on the same webpage.
  • Methodical Guidelines for the assessment of faults in the Bohemian Massif - possibly to be fused with the text part of the Fault database
  • Publication in peer-reviewed journal
  • Conference papers

Cooperation

Research team is comprised of 3 senior experts coming from three research institutions:

Close cooperation within the framework of the WP1 team is assumed, especially the exchange of experience with methodical approaches to fault capability assessment, results of paleoseismologic studies, estimation of Mmax and implementation of uncertain fault parametres to the PSHA.

Bilateral consultations regarding cross-border faults of the Czech Republic, Germany, Austria, Slovakia and Poland are planned.

Further cooperation/harmonization is also planned with other teams developing national and European databases of the active faults.