Member Since 1982
Norm A. Abrahamson
Adjunct professor, University of California Berkeley
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Modeling Non-Ergodic Path Effects and Their Interfrequency Correlation Using Conditional Generative Model for Fourier Amplitude Spectra
AGU 2024
seismology | 09 december 2024
Maxime Lacour, Pu Ren, Rie Nakata, Nori Nakata, No...
Recent approaches to model spatially varying path effects in non-ergodic ground-motion models use Gaussian Processes (GP) to learn path effects from o...
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Physically-based Non-Ergodic Event Terms in the 2023 U.S. National Seismic Hazard Research and Development Model
AGU 2024
seismology | 09 december 2024
Mark D. Petersen, Yuehua Zeng, Norman A. Abrahamso...
We create new physics-based spatially varying (non-ergodic) event terms for the research and development model of the 2023 National Seismic Hazard Mod...
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Correlation of Non-ergodic Path Effects for Peak Ground Motion and Duration with Macroseismic Intensity in California
THE VALUE OF MACROSEISMIC INTENSITY DATA: FROM EARTHQUAKE SOURCE CHARACTERIZATION TO GROUND MOTION AND SEISMIC HAZARD ESTIMATION AND TESTING II POSTER
seismology | 15 december 2023
Chih Hsuan Sung, Norman A. Abrahamson
The field of ground-motion models (GMMs) has been moving from ergodic models that are average models for large regions to non-ergodic models that incl...
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Biases in Ground-Motion to Intensity Conversion Equations (GMICE): Causes and Updated Methodologies
THE VALUE OF MACROSEISMIC INTENSITY DATA: FROM EARTHQUAKE SOURCE CHARACTERIZATION TO GROUND MOTION AND SEISMIC HAZARD ESTIMATION AND TESTING I ORAL
seismology | 14 december 2023
Molly M. Gallahue, Norman A. Abrahamson
Ground-motion to intensity conversion equations (GMICE) allow for conversion between ground-motion amplitude and shaking intensity. The current method...
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How Well Can Macroseismic Intensities Constrain Moment Magnitude?
THE VALUE OF MACROSEISMIC INTENSITY DATA: FROM EARTHQUAKE SOURCE CHARACTERIZATION TO GROUND MOTION AND SEISMIC HAZARD ESTIMATION AND TESTING I ORAL
seismology | 14 december 2023
Madeleine C Lucas, Susan E. Hough, Seth Stein, Lea...
Macroseismic data are valuable, and often required, to constrain earthquake source parameters for historical (pre-instrumental) earthquakes. Current m...
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Effects of the limitations of current ground-motion intensity conversion equations (GMICE) on intensity estimates for ShakeMap applications
THE VALUE OF MACROSEISMIC INTENSITY DATA: FROM EARTHQUAKE SOURCE CHARACTERIZATION TO GROUND MOTION AND SEISMIC HAZARD ESTIMATION AND TESTING I ORAL
seismology | 14 december 2023
Norman A. Abrahamson
ShakeMap and ShakeAlert use both ground-motion data and intensity data which requires conversions between ground-motion data and intensity data. The m...
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Shortening the time to move natural-hazard research to engineering practice: examples from earthquake ground-motion research
GILBERT F. WHITE DISTINGUISHED LECTURE
natural hazards | 11 december 2023
Norman A. Abrahamson
The end goal of natural hazard research is to reduce future loses from natural hazards. The issue for researchers is how to get their research used in...
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Re-evaluating Ground Motion Intensity Conversion Equations for California and Implications for Hazard Map Assessment
SEISMOLOGY CONTRIBUTIONS: EARTHQUAKE GROUND MOTIONS AND ENGINEERING SEISMOLOGY III ORAL
seismology | 15 december 2022
Molly M. Gallahue, Norman A. Abrahamson
Ground-motion intensity conversion equations (GMICE) are used to describe the relationship between ground-motion amplitude and shaking intensity. GMIC...
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