2019
DOI: 10.1093/gji/ggz009
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The 2016 Gyeongju earthquake sequence revisited: aftershock interactions within a complex fault system

Abstract: , a moderate earthquake (M L 5.8) occurred in Gyeongju, South Korea, located hundreds of kilometres away from the nearest plate boundaries. The earthquake, the largest instrumentally recorded event in South Korea, occurred in a sequence of thousands of earthquakes, including a M L 5.1 event 50 min before the main quake and a M L 4.5 event a week later. As a case study, we analyse the source parameters of the 2016 Gyeongju earthquake sequence: precise relocations, fault structures, focal mechanisms, stress tens… Show more

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Cited by 33 publications
(23 citation statements)
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References 74 publications
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“…However, the minimum principal stress was subvertical compared with the regional stress field of the Korean Peninsula (Soh et al, 2018). For the southeastern part of the Korean Peninsula and the 2016 Gyeongju earthquake sequence (Chang et al, 2010;Woo et al, 2019b), although there was a slight difference in the trend of the principal stresses, the plunges of the intermediate and minimum stresses were determined to be sub-vertical, similar to the results of this study.…”
Section: Discussionsupporting
confidence: 82%
See 1 more Smart Citation
“…However, the minimum principal stress was subvertical compared with the regional stress field of the Korean Peninsula (Soh et al, 2018). For the southeastern part of the Korean Peninsula and the 2016 Gyeongju earthquake sequence (Chang et al, 2010;Woo et al, 2019b), although there was a slight difference in the trend of the principal stresses, the plunges of the intermediate and minimum stresses were determined to be sub-vertical, similar to the results of this study.…”
Section: Discussionsupporting
confidence: 82%
“…The estimated b-values were significantly lower than those for earthquakes on the Korean Peninsula (Noh, 2019;Park et al, 2021) and the 2016 Gyeongju earthquake sequence (Woo et al, 2019b), exhibiting a similar trend even with a short-term aftershock catalog (Woo et al, 2020). The b-values have been considered to be related to various factors, such as the faulting type (Schorlemmer et al, 2005), material properties (Mogi, 1962;Ogata et al, 1991), and crustal stress (Scholz, 2015;Rigo et al, 2018).…”
Section: Discussionmentioning
confidence: 88%
“…Most of the faults in Figure 3 have not been clarified for their activity. Recent studies (Lee et al 2018;Woo et al 2019), based on micro-seismicity related to the 2016 M 5.8 earthquake, differentiated active faults, including the YF and UF, into the Gaum fault (GF),…”
Section: Resultsmentioning
confidence: 99%
“…In South Korea, there are three permanent seismic networks: 1) the KG network operated by the Korea Institute of Geoscience and Mineral Resources (KIGAM), 2) the KS network operated by the Korea Meteorological Administration (KMA), and 3) the KN network operated by the Korea Hydro and Nuclear Power (KHNP) . These permanent stations provide valuable seismic waveform data for various studies aiming to elucidate earthquake properties and seismic structure of the Korean Peninsula (Kang and Baag, 2004;Kim et al, 2010;Kim et al, 2017;Kim et al, 2018;Woo et al, 2019;. The number of seismic stations has increased continuously since the modern KMA seismograph network operation started in 1978.…”
Section: Introductionmentioning
confidence: 99%