Proposal of a New Method for Combining Seismological and Geological Information Aimed at Seimsic Hazard Analysis: Fams Method- Fault and Area Zone Moment Shearing.
Description:
With the advent of precise timing of geological strata, GPS techniques, and more recently remote sensing techniques a much more detailed quantification of mapped faults has been made posible. This opens a new horizon in order to improve the knowledge of seismic hazard, allowing the modeling of faults as independent sources, thus considering fault-type sources. However, today it is necessary to combine this type of sources with other zone-type sources, which harbor scattered seismicity that cannot be directly correlated with faults. The recurrence of both types of sources is derived from very different data sources: geological data for the faults and seismic catalog for the zones. The problem that arises when combining both types of sources is how to distribute the seismic potential between both kind of sources.
In this work, a new method is proposed to distribute the seismic moment, called: Fault and Area zone Moment Shearing (FAMS). The basis for this method is the hypothesis that seismic moment from magnitudes higher than a given magnitude (MMZ) is attributed only to the fault, whereas the lower magnitudes may be distributed in the fault and in the zone. MMZ is the maximum magnitude for the zone, but is not the minimum magnitude for the fault. A formulation is developed to arrive at deducing the fault recurrence law in the two ranges of magnitude in the faults: (Mmin, MMZ) and (MMz, Mmax), as well as the recurrence law for the zone considering only the residual seismicity. The advantage of this method is that it does not require assuming a prior or regional b value in the fault.
Session: Opportunities and Challenges in Source Modeling for Seismic Hazard Analysis [Poster]
Type: Poster
Date: 4/20/2023
Presentation Time: 08:00 AM (local time)
Presenting Author: María Belén Benito Oterino
Student Presenter: No
Invited Presentation:
Authors
María Belén Benito Oterino Presenting Author Corresponding Author mariabelen.benito@upm.es Universidad Politécnica de Madrid |
Conrad Lindholm conrad.lindholm@outlook.com SeismoConsult |
Carlos Gamboa Canté carlosjose.gamboa@alumnos.upm.es Universidad Politécnica de Madrid |
Adriana Fátima Ornales Agrela af.ornelas@alumnos.upm.es Universidad Politécnica de Madrid |
Mario Arroyo Solórzano marroso1210@gmail.com Universidad Politécnica de Madrid |
|
|
|
|
Proposal of a New Method for Combining Seismological and Geological Information Aimed at Seimsic Hazard Analysis: Fams Method- Fault and Area Zone Moment Shearing.
Category
Opportunities and Challenges in Source Modeling for Seismic Hazard Analysis