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Source parameters of the 2023 ML 6.4 Jajarkot earthquake in the western Nepal seismic gap zone.

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Title: Source parameters of the 2023 ML 6.4 Jajarkot earthquake in the western Nepal seismic gap zone.
Authors: Dhakal, Sanjev1,2, Bai, Ling1,2 bailing@itpcas.ac.cn, Song, Bowen3, Li, Guohui4, Rahman, Md. Moklesur1,5, Su, Hui6, Chen, Zhiwen1,2, Wang, Shaojun1,2, Li, Hongru1,2, Li, Li7
Source: Earthquake Science. Jun2026, Vol. 39 Issue 3, p273-285. 13p.
Subject Terms: *Thrust faults (Geology), *Seismology, *Earthquakes, *Seismotectonics, *Surface fault ruptures
Geographic Terms: Nepal, Himalaya Mountains
Abstract: The 2023 local magnitude (ML) 6.4 Jajarkot earthquake was the most destructive event to occur in the source region of the 1505 MW8.2 Lo Mangthang Mustang earthquake in western Nepal. Here we used local seismic stations deployed in Nepal and southern China, and teleseismic stations with depth phase records to study the earthquake relocation and source rupture process. The Jajarkot earthquake was relocated to an epicenter at 28.828°N, 82.110°E and a focal depth of 13 km. The fault plane solution showed a thrust fault earthquake with a north-dipping angle of 21°. The released seismic moment was 3.88 × 1017 N·m, corresponding to a moment magnitude (MW) of 5.7. The rupture area was 25 km along the strike and 20 km along the dip. The rupture nucleated on the ramp structure of the main Himalayan thrust and propagated to shallower depths, causing severe damage to the surrounding region. This study provides new insights into the local geometry of the main Himalayan thrust within the seismic gap zone in western Nepal. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 194060090
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Source parameters of the 2023 M<subscript>L</subscript> 6.4 Jajarkot earthquake in the western Nepal seismic gap zone.
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  Data: <searchLink fieldCode="AR" term="%22Dhakal%2C+Sanjev%22">Dhakal, Sanjev</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Bai%2C+Ling%22">Bai, Ling</searchLink><relatesTo>1,2</relatesTo><i> bailing@itpcas.ac.cn</i><br /><searchLink fieldCode="AR" term="%22Song%2C+Bowen%22">Song, Bowen</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Li%2C+Guohui%22">Li, Guohui</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Rahman%2C+Md%2E+Moklesur%22">Rahman, Md. Moklesur</searchLink><relatesTo>1,5</relatesTo><br /><searchLink fieldCode="AR" term="%22Su%2C+Hui%22">Su, Hui</searchLink><relatesTo>6</relatesTo><br /><searchLink fieldCode="AR" term="%22Chen%2C+Zhiwen%22">Chen, Zhiwen</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Wang%2C+Shaojun%22">Wang, Shaojun</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Li%2C+Hongru%22">Li, Hongru</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Li%2C+Li%22">Li, Li</searchLink><relatesTo>7</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Earthquake+Science%22">Earthquake Science</searchLink>. Jun2026, Vol. 39 Issue 3, p273-285. 13p.
– Name: Subject
  Label: Subject Terms
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  Data: *<searchLink fieldCode="DE" term="%22Thrust+faults+%28Geology%29%22">Thrust faults (Geology)</searchLink><br />*<searchLink fieldCode="DE" term="%22Seismology%22">Seismology</searchLink><br />*<searchLink fieldCode="DE" term="%22Earthquakes%22">Earthquakes</searchLink><br />*<searchLink fieldCode="DE" term="%22Seismotectonics%22">Seismotectonics</searchLink><br />*<searchLink fieldCode="DE" term="%22Surface+fault+ruptures%22">Surface fault ruptures</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22Nepal%22">Nepal</searchLink><br /><searchLink fieldCode="DE" term="%22Himalaya+Mountains%22">Himalaya Mountains</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The 2023 local magnitude (ML) 6.4 Jajarkot earthquake was the most destructive event to occur in the source region of the 1505 MW8.2 Lo Mangthang Mustang earthquake in western Nepal. Here we used local seismic stations deployed in Nepal and southern China, and teleseismic stations with depth phase records to study the earthquake relocation and source rupture process. The Jajarkot earthquake was relocated to an epicenter at 28.828°N, 82.110°E and a focal depth of 13 km. The fault plane solution showed a thrust fault earthquake with a north-dipping angle of 21°. The released seismic moment was 3.88 × 1017 N·m, corresponding to a moment magnitude (MW) of 5.7. The rupture area was 25 km along the strike and 20 km along the dip. The rupture nucleated on the ramp structure of the main Himalayan thrust and propagated to shallower depths, causing severe damage to the surrounding region. This study provides new insights into the local geometry of the main Himalayan thrust within the seismic gap zone in western Nepal. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=194060090
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      – Type: doi
        Value: 10.1016/j.eqs.2026.03.003
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      – Code: eng
        Text: English
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        PageCount: 13
        StartPage: 273
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      – SubjectFull: Thrust faults (Geology)
        Type: general
      – SubjectFull: Seismology
        Type: general
      – SubjectFull: Earthquakes
        Type: general
      – SubjectFull: Seismotectonics
        Type: general
      – SubjectFull: Surface fault ruptures
        Type: general
      – SubjectFull: Nepal
        Type: general
      – SubjectFull: Himalaya Mountains
        Type: general
    Titles:
      – TitleFull: Source parameters of the 2023 ML 6.4 Jajarkot earthquake in the western Nepal seismic gap zone.
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            – D: 01
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
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              Value: 39
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