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DOI | 10.1029/2020GL088266 |
On the relationship between offshore geodetic coverage and slip model uncertainty: Analog megathrust earthquake case studies | |
Ehsan Kosari; Matthias Rosenau; Jonathan Bedford; Michael Rudolf; Onno Oncken | |
2020-07-19 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2020 |
英文摘要 | We apply a geodetic slip inversion technique to analog subduction megathrust earthquakes to demonstrate how limited offshore geodetic coverage affects coseismic slip models. We analyzed two archetypical megathrust earthquakes: trench‐breaking and non‐trench‐breaking earthquakes. Slip inversion models of analog earthquakes show quantitative and qualitative changes as a function of offshore coverage. Shallow slip cannot be resolved if the observation coverage of the offshore segment is <50%. Moreover, the slip pattern of shallow event flips from landward to trenchward skewed as offshore coverage reduces to <40%. The estimated slip for both event types converges to a similar unimodal pattern when there is no offshore coverage. We infer 5‐20% slip overestimation when the observations are above the high slipping zone during trench‐breaking events versus 5‐10% underestimation during non‐trench‐breaking events if observations are land‐limited. The moment magnitude derived for trench‐breaking ruptures might be significantly affected (ΔM w ~ 0.5). |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/284181 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Ehsan Kosari,Matthias Rosenau,Jonathan Bedford,et al. On the relationship between offshore geodetic coverage and slip model uncertainty: Analog megathrust earthquake case studies[J]. Geophysical Research Letters,2020. |
APA | Ehsan Kosari,Matthias Rosenau,Jonathan Bedford,Michael Rudolf,&Onno Oncken.(2020).On the relationship between offshore geodetic coverage and slip model uncertainty: Analog megathrust earthquake case studies.Geophysical Research Letters. |
MLA | Ehsan Kosari,et al."On the relationship between offshore geodetic coverage and slip model uncertainty: Analog megathrust earthquake case studies".Geophysical Research Letters (2020). |
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