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An Explosion Model Comparison with Insights from the Source Physics Experiments

2013; Seismological Society of America; Volume: 103; Issue: 5 Linguagem: Inglês

10.1785/0120130035

1943-3573

S. R. Ford, W. R. Walter,

High-pressure geophysics and materials

Brief Report| October 01, 2013 An Explosion Model Comparison with Insights from the Source Physics Experiments Sean R. Ford; Sean R. Ford Lawrence Livermore National Laboratory, P.O. Box 808, L‐046, Livermore, California 94550 Search for other works by this author on: GSW Google Scholar William R. Walter William R. Walter Lawrence Livermore National Laboratory, P.O. Box 808, L‐046, Livermore, California 94550 Search for other works by this author on: GSW Google Scholar Author and Article Information Sean R. Ford Lawrence Livermore National Laboratory, P.O. Box 808, L‐046, Livermore, California 94550 William R. Walter Lawrence Livermore National Laboratory, P.O. Box 808, L‐046, Livermore, California 94550 Publisher: Seismological Society of America First Online: 14 Jul 2017 Online ISSN: 1943-3573 Print ISSN: 0037-1106 Bulletin of the Seismological Society of America (2013) 103 (5): 2937–2945. https://doi.org/10.1785/0120130035 Article history First Online: 14 Jul 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Sean R. Ford, William R. Walter; An Explosion Model Comparison with Insights from the Source Physics Experiments. Bulletin of the Seismological Society of America 2013;; 103 (5): 2937–2945. doi: https://doi.org/10.1785/0120130035 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of the Seismological Society of America Search Advanced Search Abstract Seismic spectral models for chemical and nuclear explosions are used in many applications including network modeling and yield estimation. Here we compare the models presented in Denny and Johnson (1991) and Mueller and Murphy (1971) with each other and with new results from the Source Physics Experiments (SPE). We demonstrate analytically the two models are in substantial agreement for large and normally buried explosions, consistent with much of the historic data collected during American and Soviet nuclear testing. However, for small and/or deeply buried explosions, the spectral predictions of the two models can differ significantly. For example, the predicted yield of a 1 km deep, Mw 2 nuclear explosion differs by more than a factor of 5; and, for the same moment and depth chemical explosion, the difference is greater than a factor of 10. We compare the models with initial data from the SPE, which include small and overburied chemical explosions. The corner frequency of the one‐ton SPE explosion (SPE‐2) is slightly higher than the Mueller and Murphy (1971) model and approximately double the Denny and Johnson (1991) model prediction. The absolute moment of the one‐tenth ton SPE explosion (SPE‐1) is near the Denny and Johnson (1991) prediction and an order of magnitude smaller than the Mueller and Murphy (1971) prediction. The low‐frequency moment ratio for SPE‐2/SPE‐1 is more consistent with the Denny and Johnson (1991) model. The results presented here show the need for an improved explosion source model that can accommodate a wider range of yields and emplacement conditions.Online Material: Moment magnitude, corner frequency, and yield for all geologic media. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.