Waveform Tomography Improves Far-Regional Distance Simulations of Underground Nuclear Explosions and Earthquakes from the Former Nuclear Test Site, Western United States
We investigated the efficacy of seismic Earth models to simulate complete regional distance waveforms from underground nuclear explosions and earthquakes on and near the former Nevada Test Site in Nevada, western United States. We focused on two far-regional stations (∼1000 km) in two period bands 2...
Saved in:
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Seismological Society of America
2024-11-01
|
| Series: | The Seismic Record |
| Online Access: | https://doi.org/10.1785/0320240039 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850119647661129728 |
|---|---|
| author | Arthur Rodgers |
| author_facet | Arthur Rodgers |
| author_sort | Arthur Rodgers |
| collection | DOAJ |
| description | We investigated the efficacy of seismic Earth models to simulate complete regional distance waveforms from underground nuclear explosions and earthquakes on and near the former Nevada Test Site in Nevada, western United States. We focused on two far-regional stations (∼1000 km) in two period bands 20–50 and 15–40 s, for which path propagation effects over many wavelengths accumulate and pose challenges to low-magnitude nuclear explosion monitoring (NEM). Four seismic models were considered: two average radially symmetric 1D and two fully 3D models. Model performance was evaluated with metrics of waveform phase (cross-correlation delay time), shape (correlation coefficient), and amplitude (variance reduction with delay time shift) and averaged into a summary score. We found that a recent 3D model based on full waveform inversion (FWI) tomography including radial anisotropy and crustal thickness variations performs on average better than the alternatives. Results suggest that FWI based on crustal depth earthquakes can provide useful 3D models for NEM. Such models can be used for the simulation of Green’s functions for source characterization including moment tensor inversion and source type characterization (e.g., explosion–earthquake–collapse identification, moment and yield estimation). |
| format | Article |
| id | doaj-art-c5de91f6d9a44c5d8c58f97032d07e08 |
| institution | OA Journals |
| issn | 2694-4006 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Seismological Society of America |
| record_format | Article |
| series | The Seismic Record |
| spelling | doaj-art-c5de91f6d9a44c5d8c58f97032d07e082025-08-20T02:35:35ZengSeismological Society of AmericaThe Seismic Record2694-40062024-11-014429930710.1785/032024003924039Waveform Tomography Improves Far-Regional Distance Simulations of Underground Nuclear Explosions and Earthquakes from the Former Nuclear Test Site, Western United StatesArthur Rodgers0https://orcid.org/0000-0002-6784-5695Geophysical Monitoring Program, Lawrence Livermore National Laboratory, Livermore, California, U.S.A.We investigated the efficacy of seismic Earth models to simulate complete regional distance waveforms from underground nuclear explosions and earthquakes on and near the former Nevada Test Site in Nevada, western United States. We focused on two far-regional stations (∼1000 km) in two period bands 20–50 and 15–40 s, for which path propagation effects over many wavelengths accumulate and pose challenges to low-magnitude nuclear explosion monitoring (NEM). Four seismic models were considered: two average radially symmetric 1D and two fully 3D models. Model performance was evaluated with metrics of waveform phase (cross-correlation delay time), shape (correlation coefficient), and amplitude (variance reduction with delay time shift) and averaged into a summary score. We found that a recent 3D model based on full waveform inversion (FWI) tomography including radial anisotropy and crustal thickness variations performs on average better than the alternatives. Results suggest that FWI based on crustal depth earthquakes can provide useful 3D models for NEM. Such models can be used for the simulation of Green’s functions for source characterization including moment tensor inversion and source type characterization (e.g., explosion–earthquake–collapse identification, moment and yield estimation).https://doi.org/10.1785/0320240039 |
| spellingShingle | Arthur Rodgers Waveform Tomography Improves Far-Regional Distance Simulations of Underground Nuclear Explosions and Earthquakes from the Former Nuclear Test Site, Western United States The Seismic Record |
| title | Waveform Tomography Improves Far-Regional Distance Simulations of Underground Nuclear Explosions and Earthquakes from the Former Nuclear Test Site, Western United States |
| title_full | Waveform Tomography Improves Far-Regional Distance Simulations of Underground Nuclear Explosions and Earthquakes from the Former Nuclear Test Site, Western United States |
| title_fullStr | Waveform Tomography Improves Far-Regional Distance Simulations of Underground Nuclear Explosions and Earthquakes from the Former Nuclear Test Site, Western United States |
| title_full_unstemmed | Waveform Tomography Improves Far-Regional Distance Simulations of Underground Nuclear Explosions and Earthquakes from the Former Nuclear Test Site, Western United States |
| title_short | Waveform Tomography Improves Far-Regional Distance Simulations of Underground Nuclear Explosions and Earthquakes from the Former Nuclear Test Site, Western United States |
| title_sort | waveform tomography improves far regional distance simulations of underground nuclear explosions and earthquakes from the former nuclear test site western united states |
| url | https://doi.org/10.1785/0320240039 |
| work_keys_str_mv | AT arthurrodgers waveformtomographyimprovesfarregionaldistancesimulationsofundergroundnuclearexplosionsandearthquakesfromtheformernucleartestsitewesternunitedstates |