دورية أكاديمية
Seismic Constraints on Damage Growth Within an Unstable Hanging Glacier
| العنوان: | Seismic Constraints on Damage Growth Within an Unstable Hanging Glacier |
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| المؤلفون: | Małgorzata Chmiel, Fabian Walter, Antoine Pralong, Lukas Preiswerk, Martin Funk, Lorenz Meier, Florent Brenguier |
| المصدر: | Geophysical Research Letters, Vol 50, Iss 9, Pp n/a-n/a (2023) |
| بيانات النشر: | Wiley, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Geophysics. Cosmic physics |
| مصطلحات موضوعية: | environmental seismology, hanging glaciers, coda wave interferometry, icequake multiplets, natural hazards, Geophysics. Cosmic physics, QC801-809 |
| الوصف: | Abstract Forecasting hanging glacier instabilities remain challenging as sensing technology focusing on the ice surface fails to detect englacial damage leading to large‐scale failure. Here, we combine icequake cluster analysis with coda wave interferometry constraining damage growth on Switzerland's Eiger hanging glacier before a 15,000 m3 break‐off event. The method focuses on icequake migration within clusters rather than previously proposed “event counting.” Results show that one cluster originated from the glacier front and migrated by 13.9(±1.2) m within 5 weeks before the break‐off event. The corresponding crevasse extension separates unstable and stable ice masses. We use the measured source displacement for damage parametrization and find a 90% agreement between an analytical model based on damage mechanics and frontal flow velocities measured with an interferometric radar. Our analysis provides observational constraints for damage growth, which to date is primarily a theoretical concept for modeling englacial fractures. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1944-8007 0094-8276 |
| Relation: | https://doaj.org/toc/0094-8276; https://doaj.org/toc/1944-8007 |
| DOI: | 10.1029/2022GL102007 |
| URL الوصول: | https://doaj.org/article/78676c1676c54b3593ce6c8f58162bea |
| رقم الأكسشن: | edsdoj.78676c1676c54b3593ce6c8f58162bea |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 19448007 00948276 |
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| DOI: | 10.1029/2022GL102007 |