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An empirically regional ground motion model for earthquakes in Sichuan-Yunnan of Southwest China.

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Title: An empirically regional ground motion model for earthquakes in Sichuan-Yunnan of Southwest China.
Authors: Hou, Ruibin1,2 (AUTHOR) ruibin90816@163.com, Pan, Yichen1 (AUTHOR), Zhao, John X.2 (AUTHOR), Xing, Hao3 (AUTHOR), Ji, Kun4 (AUTHOR), Xie, Junju5 (AUTHOR)
Source: Bulletin of Earthquake Engineering. Jun2026, Vol. 24 Issue 6, p3579-3614. 36p.
Subject Terms: *Ground motion, *Earthquakes, *Attenuation (Physics), *Accelerograms, *Earthquake hazard analysis, *Wenchuan Earthquake, China, 2008, *Seismic response
Geographic Terms: Sichuan Sheng (China), Southwest China, Yunnan Sheng (China)
Abstract: The Sichuan-Yunnan region in Southwest China is a seismically active area, and ground motion models (GMMs) are an essential component of seismic hazard analysis in this region. This paper presents a horizontal GMM for Sichuan-Yunnan region, referred to as the SWC model, developed using a strong-motion dataset comprising 2,285 records collected between 2007 and 2022. The metadata in our dataset are compiled with high confidence, and the moment magnitudes of the events range from 3.5 to 7.9. The ground motion intensity measures including PGA, PGV, and acceleration response spectra from 0.01 s to 10 s. We used the model developed by Zhao (Bull Seismol Soc Am 106(4):1552–1569, 2016) as a reference to derive the SWC model. A bilinear magnitude-scaling term hinged at MW 7.1 is employed, along with a set of simple geometric attenuation functions to accommodate the relatively strong intensity of near-source records. The magnitude scaling rate for MW > 7.1 events is selected from historical studies to better fit the 2008 Wenchuan earthquake. Site class based on VS30 is used to model site response due to the mixed sources of site data, with more than half sites having borehole information. Notable site resonance effects were observed in the site terms. Compared with the NGA-West models, the SWC model predicts larger short-period spectral accelerations for small-magnitude events and smaller long-period spectral accelerations for large events with Mw around 8.0. In comparison with previously developed models for this region, our model predicts higher-confidence near-source spectra, and significantly smaller between-event and within-event standard deviations at periods longer than about 0.4s. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
FullText Text:
  Availability: 0
Header DbId: enr
DbLabel: Energy & Power Source
An: 194199908
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
  Group: Ti
  Data: An empirically regional ground motion model for earthquakes in Sichuan-Yunnan of Southwest China.
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  Data: <searchLink fieldCode="AR" term="%22Hou%2C+Ruibin%22">Hou, Ruibin</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> ruibin90816@163.com</i><br /><searchLink fieldCode="AR" term="%22Pan%2C+Yichen%22">Pan, Yichen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhao%2C+John+X%2E%22">Zhao, John X.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xing%2C+Hao%22">Xing, Hao</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ji%2C+Kun%22">Ji, Kun</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xie%2C+Junju%22">Xie, Junju</searchLink><relatesTo>5</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Bulletin+of+Earthquake+Engineering%22">Bulletin of Earthquake Engineering</searchLink>. Jun2026, Vol. 24 Issue 6, p3579-3614. 36p.
– Name: Subject
  Label: Subject Terms
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  Data: *<searchLink fieldCode="DE" term="%22Ground+motion%22">Ground motion</searchLink><br />*<searchLink fieldCode="DE" term="%22Earthquakes%22">Earthquakes</searchLink><br />*<searchLink fieldCode="DE" term="%22Attenuation+%28Physics%29%22">Attenuation (Physics)</searchLink><br />*<searchLink fieldCode="DE" term="%22Accelerograms%22">Accelerograms</searchLink><br />*<searchLink fieldCode="DE" term="%22Earthquake+hazard+analysis%22">Earthquake hazard analysis</searchLink><br />*<searchLink fieldCode="DE" term="%22Wenchuan+Earthquake%2C+China%2C+2008%22">Wenchuan Earthquake, China, 2008</searchLink><br />*<searchLink fieldCode="DE" term="%22Seismic+response%22">Seismic response</searchLink>
– Name: SubjectGeographic
  Label: Geographic Terms
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  Data: <searchLink fieldCode="DE" term="%22Sichuan+Sheng+%28China%29%22">Sichuan Sheng (China)</searchLink><br /><searchLink fieldCode="DE" term="%22Southwest+China%22">Southwest China</searchLink><br /><searchLink fieldCode="DE" term="%22Yunnan+Sheng+%28China%29%22">Yunnan Sheng (China)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The Sichuan-Yunnan region in Southwest China is a seismically active area, and ground motion models (GMMs) are an essential component of seismic hazard analysis in this region. This paper presents a horizontal GMM for Sichuan-Yunnan region, referred to as the SWC model, developed using a strong-motion dataset comprising 2,285 records collected between 2007 and 2022. The metadata in our dataset are compiled with high confidence, and the moment magnitudes of the events range from 3.5 to 7.9. The ground motion intensity measures including PGA, PGV, and acceleration response spectra from 0.01 s to 10 s. We used the model developed by Zhao (Bull Seismol Soc Am 106(4):1552–1569, 2016) as a reference to derive the SWC model. A bilinear magnitude-scaling term hinged at MW 7.1 is employed, along with a set of simple geometric attenuation functions to accommodate the relatively strong intensity of near-source records. The magnitude scaling rate for MW > 7.1 events is selected from historical studies to better fit the 2008 Wenchuan earthquake. Site class based on VS30 is used to model site response due to the mixed sources of site data, with more than half sites having borehole information. Notable site resonance effects were observed in the site terms. Compared with the NGA-West models, the SWC model predicts larger short-period spectral accelerations for small-magnitude events and smaller long-period spectral accelerations for large events with Mw around 8.0. In comparison with previously developed models for this region, our model predicts higher-confidence near-source spectra, and significantly smaller between-event and within-event standard deviations at periods longer than about 0.4s. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1007/s10518-026-02430-y
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 36
        StartPage: 3579
    Subjects:
      – SubjectFull: Ground motion
        Type: general
      – SubjectFull: Earthquakes
        Type: general
      – SubjectFull: Attenuation (Physics)
        Type: general
      – SubjectFull: Accelerograms
        Type: general
      – SubjectFull: Earthquake hazard analysis
        Type: general
      – SubjectFull: Wenchuan Earthquake, China, 2008
        Type: general
      – SubjectFull: Seismic response
        Type: general
      – SubjectFull: Sichuan Sheng (China)
        Type: general
      – SubjectFull: Southwest China
        Type: general
      – SubjectFull: Yunnan Sheng (China)
        Type: general
    Titles:
      – TitleFull: An empirically regional ground motion model for earthquakes in Sichuan-Yunnan of Southwest China.
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            NameFull: Pan, Yichen
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            NameFull: Zhao, John X.
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            – D: 15
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 1570761X
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              Value: 24
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