当前位置: X-MOL 学术Seismol. Res. Lett. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
gWFM: A Global Catalog of Moderate‐Magnitude Earthquakes Studied Using Teleseismic Body Waves
Seismological Research Letters ( IF 3.3 ) Pub Date : 2021-01-01 , DOI: 10.1785/0220200218
Sam Wimpenny 1 , C. Scott Watson 2
Affiliation  

We present a compilation of 2131 high‐fidelity mechanisms and centroid depths of moderate‐magnitude earthquakes derived using synthetic body‐waveform modeling (the Global Waveform‐Modelled Earthquake Catalog v1.0—gWFM), which can be visualized and downloaded online (see Data and Resources). In this article, we describe the methods used to construct the gWFM and present a comparison between the earthquake depths and focal mechanisms in the gWFM with those derived by the International Seismological Centre, Global Centroid Moment Tensor (Global CMT) project, and the U.S. Geological Survey (USGS) W‐phase, as well as 60 events studied using geodesy. We find that 20%–30% of the earthquakes in routine global catalogs have depths that differ by more than 10 km from those in the gWFM. Shallow‐crustal earthquakes of Mw 5–6 are typically the worst located in depth by routine catalogs. Over 90% of the earthquakes in the gWFM are within ±15° in strike, ±5° in dip, and ±15° in rake of the Global CMT and USGS W‐phase best double‐couple moment tensor solutions. However, the mechanisms of shallow Mw 5–6 earthquakes in the routine catalogs can be inaccurate, due to the well‐known insensitivity of long‐period surface waves to the vertical dip‐slip components of the moment tensor. The gWFM is an archive of well‐constrained earthquake source parameters, though it will continue to update as new earthquake mechanisms and depths are published, thereby remaining an up‐to‐date research tool.

中文翻译:

gWFM:使用远震体波研究的中度地震全球目录

我们提供了使用合成人体波形模型(《全球波形模型地震目录v1.0-gWFM》)得出的2131个高保真机制和中震级的质心深度的汇编,可以在线查看和下载(请参阅数据和资源)。在本文中,我们描述了构造gWFM的方法,并给出了gWFM中地震深度和震源机制与国际地震中心,全球质心矩张量(Global CMT)项目和美国地质学得出的地震深度和震源机制之间的比较。调查(USGS)W相以及使用大地测量学研究的60个事件。我们发现,常规全球目录中20%至30%的地震深度与gWFM的深度相差10多公里。根据常规目录,5-6兆瓦的浅层地壳地震通常是最严重的。全球CMT和USGS W相最佳双偶合矩张量解的90%以上gWFM地震的走向在±15°范围内,倾角在±5°范围内,瑞克在±15°范围内。但是,由于众所周知,长周期表面波对矩张量的垂直倾滑分量不敏感,因此常规目录中的5-6级Mw浅地震的机理可能是不准确的。gWFM是一个受严格约束的地震震源参数的档案,尽管随着新的地震机理和深度的发布,它将继续更新,因此仍然是最新的研究工具。Global CMT和USGS W相最佳双偶合矩张量解决方案的前角为±15°。但是,由于众所周知,长周期表面波对矩张量的垂直倾滑分量不敏感,因此常规目录中的5-6级Mw浅地震的机理可能是不准确的。gWFM是一个受严格约束的地震震源参数的档案,尽管随着新的地震机理和深度的发布,它将继续更新,因此仍然是最新的研究工具。Global CMT和USGS W相最佳双偶合矩张量解决方案的前角为±15°。但是,由于众所周知,长周期表面波对矩张量的垂直倾滑分量不敏感,因此常规目录中的5-6级Mw浅地震的机理可能是不准确的。gWFM是一个受严格约束的地震震源参数的档案,尽管随着新的地震机理和深度的发布,它将继续更新,因此仍然是最新的研究工具。
更新日期:2020-12-31
down
wechat
bug