What question did this study set out to answer?

This research aims to enhance the understanding of source characteristics for moderately large earthquakes and reduce uncertainty in the associated seismic models.

April 23, 2026Geophysical Journal InternationalOpen Access

Improved Joint Constraints on Moment Tensors, Source Time Functions, and Uncertainty Quantification for Moderately Large Earthquakes

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Authors

JHJinyin Hu HTHrvoje Tkalčić TPThanh-Son Phạm

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Overview

An analysis reveals refined source characteristics of regional earthquakes, suggesting improved hazard assessments.

Key Points

This research aims to enhance the understanding of source characteristics for moderately large earthquakes and reduce uncertainty in the associated seismic models.
Developed a method to resolve centroid moment tensors and source time functions for four selected earthquakes.
Analyzed earthquakes using a 1-D geological model and incorporated data noise and Earth model errors in a Bayesian inversion framework.
Assessed waveform fits up to 0.1 Hz to derive improved solutions compared to existing catalogues.
Non-double-couple components were found in the Idaho and Nevada earthquakes, but their influence was smaller than previously thought.
The Alor and Petrinja events were consistent with pure double-couple mechanisms, with distinct fault characteristics.
Enhanced solutions provided better fits for seismic waveforms and clearer insights into source parameters and regional fault geometries.

Cite This Study

Hu et al. (2026) studied this question.

synapsesocial.com/papers/69e9ba6b85696592c86ec9e4 https://doi.org/10.1093/gji/ggag154

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April 23, 2026Geophysical Journal InternationalOpen Access

Improved Joint Constraints on Moment Tensors, Source Time Functions, and Uncertainty Quantification for Moderately Large Earthquakes

View Full Paper

Ask AI

Bookmark

Authors

JHJinyin Hu HTHrvoje Tkalčić TPThanh-Son Phạm

Discussion

Member takes

Overview

An analysis reveals refined source characteristics of regional earthquakes, suggesting improved hazard assessments.

Key Points

This research aims to enhance the understanding of source characteristics for moderately large earthquakes and reduce uncertainty in the associated seismic models.
Developed a method to resolve centroid moment tensors and source time functions for four selected earthquakes.
Analyzed earthquakes using a 1-D geological model and incorporated data noise and Earth model errors in a Bayesian inversion framework.
Assessed waveform fits up to 0.1 Hz to derive improved solutions compared to existing catalogues.
Non-double-couple components were found in the Idaho and Nevada earthquakes, but their influence was smaller than previously thought.
The Alor and Petrinja events were consistent with pure double-couple mechanisms, with distinct fault characteristics.
Enhanced solutions provided better fits for seismic waveforms and clearer insights into source parameters and regional fault geometries.

Cite This Study

Hu et al. (2026) studied this question.

synapsesocial.com/papers/69e9ba6b85696592c86ec9e4 https://doi.org/10.1093/gji/ggag154

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