Real‐Time Fault Tracking and Ground Motion Prediction for Large Earthquakes With HR‐GNSS and Deep Learning
Real‐Time Fault Tracking and Ground Motion Prediction for Large Earthquakes With HR‐GNSS and Deep Learning
复制标题
利用 HR-GNSS 和深度学习对大地震进行实时故障跟踪和地面运动预测
DOI:
10.1029/2023jb027255
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Searcy, Jacob
中科院分区:
文献类型:
--
作者:
Lin, Jiun‐Ting;Melgar, Diego;Sahakian, Valerie J.;Thomas, Amanda M.;Searcy, Jacob
Earthquake early warning (EEW) systems aim to forecast the shaking intensity rapidly after an earthquake occurs and send warnings to affected areas before the onset of strong shaking. The system relies on rapid and accurate estimation of earthquake source parameters. However, it is known that source estimation for large ruptures in real‐time is challenging, and it often leads to magnitude underestimation. In a previous study, we showed that machine learning, HR‐GNSS, and realistic rupture synthetics can be used to reliably predict earthquake magnitude. This model, called Machine‐Learning Assessed Rapid Geodetic Earthquake model (M‐LARGE), can rapidly forecast large earthquake magnitudes with an accuracy of 99%. Here, we expand M‐LARGE to predict centroid location and fault size, enabling the construction of the fault rupture extent for forecasting shaking intensity using existing ground motion models. We test our model in the Chilean Subduction Zone with thousands of simulated and five real large earthquakes. The result achieves an average warning time of 40.5 s for shaking intensity MMI4+, surpassing the 34 s obtained by a similar GNSS EEW model. Our approach addresses a critical gap in existing EEW systems for large earthquakes by demonstrating real‐time fault tracking feasibility without saturation issues. This capability leads to timely and accurate ground motion forecasts and can support other methods, enhancing the overall effectiveness of EEW systems. Additionally, the ability to predict source parameters for real Chilean earthquakes implies that synthetic data, governed by our understanding of earthquake scaling, is consistent with the actual rupture processes.
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影响因子:
3
作者:
Allen, Trevor I.;Wald, David J.
通讯作者:
Wald, David J.
影响因子:
18.1
作者:
Jiun;D. Melgar;A. Thomas;J. Searcy
通讯作者:
J. Searcy
影响因子:
3
作者:
N. Köhler;F. Wenzel;M. Erdik;J. Zschau;C. Milkereit;M. Picozzi;J. Fischer;J. Redlich;F. Kühnlenz;B. Lichtblau;Ingmar Eveslage;I. Christ;R. Lessing;C. Kiehle
通讯作者:
C. Kiehle
影响因子:
3.3
作者:
J. Murray;B. Crowell;R. Grapenthin;K. Hodgkinson;J. Langbein;T. Melbourne;D. Melgar;S. Minson;D. Schmidt
通讯作者:
D. Schmidt
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
T. Allen;D. Wald
通讯作者:
D. Wald