A Ground-motion Prediction Model for Induced Earthquakes for Central and Eastern United States
We developed a new ground motion model (GMM) for predicting ground shaking of future induced earthquake events in Central and Eastern United States. The new model is a new empirical-hybrid ground motion model (GMM) for small-to-moderate potentially induced earthquakes for Central and Eastern United States (CEUS). For this study, Pezeshk et al.'s (2018) model was used as the base model which was developed and calibrated for tectonic events in Central and Eastern North America (CENA) as part of the Next-Generation Attenuation-East (NGA-East) project. The model is a calibrated version of the base model by using a comprehensive database of potentially induced ground motions with a smaller range of magnitudes and depths than tectonic earthquakes. We implement a compiled dataset containing more than 31,000 strong-motion records from 2,596 earthquake events recorded at 370 stations. The Gulf Coast region’s all earthquake events and stations are excluded from the database of this study.
The functional form of the developed model includes 5 coefficients are extracted by using a mixed-effect regression algorithm. The proposed GMM is derived for the peak ground acceleration and response-spectral ordinates at periods ranging from 0.01 to 10.0 sec, magnitudes ranging from 3.0 to 5.8 and hypocentral distances up to 200 km. The proposed GMM has applicability in long-term and short-term U.S. Geological Survey National Seismic Hazard Maps and for the hazard evaluation of induced seismicity. We also assessed the performance and predictive capability of the developed GMM through a set of comprehensive residual analyses and compared the proposed GMM with five recently developed GMMs for earthquakes in CENA. The GMMs are utilized in the PSHA assessment of induced earthquakes through the observed data for CEUS.
Session: 50-State Update of the USGS National Seismic Hazard Models III
Type: Oral
Room: Regency E-G
Date: 4/20/2022
Presentation Time: 02:45 PM Pacific
Presenting Author: Zoya Farajpour
Student Presenter: Yes
Additional Authors
Zoya Farajpour Presenting Author Corresponding Author zfrjpour@memphis.edu University of Memphis |
Shahram Pezeshk spezeshk@memphis.edu The University of Memphis |
|
|
|
|
|
|
|
A Ground-motion Prediction Model for Induced Earthquakes for Central and Eastern United States
Category
50-State Update of the USGS National Seismic Hazard Models
Description