Thermal squeezing of the seismogenic zone controlled rupture of the volcano-rooted Flores Thrust
| Autor: | Kyle Bradley, Karen H. Lythgoe, Muzli Muzli, Teng Wang, Andri Dian Nugraha, Sri Widiyantoro, Z. Zulfakriza, Shengji Wei |
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| Přispěvatelé: | Asian School of the Environment, Earth Observatory of Singapore |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
geography
Seismographs Multidisciplinary geography.geographical_feature_category 010504 meteorology & atmospheric sciences Faulting Magnitude (mathematics) SciAdv r-articles Crust Thrust Geology [Science] Fault (geology) 010502 geochemistry & geophysics 01 natural sciences Geophysics Volcano Cascade Seismic array Thermal Seismology Geology Research Articles 0105 earth and related environmental sciences Research Article |
| Zdroj: | Science Advances Lythgoe, K, Muzli, M, Bradley, K, Wang, T, Nugraha, A D, Zulfakriza, Z, Widiyantoro, S & Wei, S 2021, ' Thermal squeezing of the seismogenic zone controlled rupture of the volcano-rooted Flores Thrust ', Science Advances . https://doi.org/10.1126/sciadv.abe2348 |
| ISSN: | 2375-2548 |
| Popis: | Volcanic heating of a tectonic fault changed the way it produces large earthquakes. Temperature plays a critical role in defining the seismogenic zone, the area of the crust where earthquakes most commonly occur; however, thermal controls on fault ruptures are rarely observed directly. We used a rapidly deployed seismic array to monitor an unusual earthquake cascade in 2018 at Lombok, Indonesia, during which two magnitude 6.9 earthquakes with surprisingly different rupture characteristics nucleated beneath an active arc volcano. The thermal imprint of the volcano on the fault elevated the base of the seismogenic zone beneath the volcanic edifice by 8 km, while also reducing its width. This thermal “squeezing” directly controlled the location, directivity, dynamics, and magnitude of the earthquake cascade. Earthquake segmentation due to thermal structure can occur where strong temperature gradients exist on a fault. |
| Databáze: | OpenAIRE |
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