气候变化领域集成服务门户(CCPortal): On the Relationship Between Offshore Geodetic Coverage and Slip Model Uncertainty: Analog Megathrust Earthquake Case Studies

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DOI	10.1029/2020GL088266
	On the Relationship Between Offshore Geodetic Coverage and Slip Model Uncertainty: Analog Megathrust Earthquake Case Studies
	Kosari E.; Rosenau M.; Bedford J.; Rudolf M.; Oncken O.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:15
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 events 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 (ΔMw ~ 0.5). © 2020. The Authors.
英文关键词	Earthquakes; Geodesy; Uncertainty analysis; Case-studies; Coseismic slips; Event Types; Inversion models; Inversion techniques; Megathrust earthquakes; Moment magnitudes; Qualitative changes; Offshore oil well production; earthquake event; geodetic network; numerical model; slip; uncertainty analysis
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170060
作者单位	Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Potsdam, Germany
推荐引用方式 GB/T 7714	Kosari E.,Rosenau M.,Bedford J.,et al. On the Relationship Between Offshore Geodetic Coverage and Slip Model Uncertainty: Analog Megathrust Earthquake Case Studies[J],2020,47(15).
APA	Kosari E.,Rosenau M.,Bedford J.,Rudolf M.,&Oncken O..(2020).On the Relationship Between Offshore Geodetic Coverage and Slip Model Uncertainty: Analog Megathrust Earthquake Case Studies.Geophysical Research Letters,47(15).
MLA	Kosari E.,et al."On the Relationship Between Offshore Geodetic Coverage and Slip Model Uncertainty: Analog Megathrust Earthquake Case Studies".Geophysical Research Letters 47.15(2020).