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Aftershock characteristics of the Mw 7. 7 Myanmar earthquake, March 2025.

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Title: Aftershock characteristics of the Mw 7. 7 Myanmar earthquake, March 2025.
Authors: Zhao, Xiaoyan1, Meng, Lingyuan2 menglingyuan@seis.ac.cn, Peng, Guanling1,3, He, Xuemei1
Source: Earthquake Science. Jun2026, Vol. 39 Issue 3, p294-310. 17p.
Subject Terms: *Earthquakes, *Geologic faults, *Seismology, *Earthquake magnitude, *Fractals, *Surface fault ruptures
Geographic Terms: Myanmar
Abstract: On March 28, 2025, a MW7.7 earthquake struck central Myanmar. In this study, an aftershock catalog recorded by the Seismic Monitoring Center of the Thailand Meteorological Department (TMD) was used to analyze the characteristics of the aftershock sequence. The TMD network detected events to ML3.0 for the Sagaing Fault and Myanmar MW7.7 earthquake, with an additional 0.2 applied as a conservative lower bound. The majority (89%) of ML≥5.5 aftershocks occurred within 16 days of the mainshock. Epidemic-Type Aftershock Sequence modeling revealed that α=2.023, indicating a reduced capacity to trigger secondary aftershocks, while p=1.17, reflecting rapid decay. These slightly high α- and p-values may be due to supershear rupturing, the high slip rate of the Sagaing Fault, and warm crustal conditions. The difference in magnitude between the largest aftershock and mainshock was 1.0, which is consistent with regional historical sequences. The spatial distribution of aftershocks was controlled by the N-S-trending Sagaing Fault, and was closely related to the mainshock slip, fault geometry, and historical rupture zones. The spatial fractal dimension (DC=1.60) indicated a fractal structure, reflecting the complexity of the regional fault structure and the spatial distribution of small earthquakes. After the MW7.7 event, the south-central Sagaing Fault ruptured, except for the Bago segment. However, the northern end of the Bago segment has the potential to produce up to a MW7.0 earthquake. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 194060085
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Aftershock characteristics of the M<subscript>w</subscript> 7. 7 Myanmar earthquake, March 2025.
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  Data: <searchLink fieldCode="JN" term="%22Earthquake+Science%22">Earthquake Science</searchLink>. Jun2026, Vol. 39 Issue 3, p294-310. 17p.
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  Data: *<searchLink fieldCode="DE" term="%22Earthquakes%22">Earthquakes</searchLink><br />*<searchLink fieldCode="DE" term="%22Geologic+faults%22">Geologic faults</searchLink><br />*<searchLink fieldCode="DE" term="%22Seismology%22">Seismology</searchLink><br />*<searchLink fieldCode="DE" term="%22Earthquake+magnitude%22">Earthquake magnitude</searchLink><br />*<searchLink fieldCode="DE" term="%22Fractals%22">Fractals</searchLink><br />*<searchLink fieldCode="DE" term="%22Surface+fault+ruptures%22">Surface fault ruptures</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22Myanmar%22">Myanmar</searchLink>
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  Label: Abstract
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  Data: On March 28, 2025, a MW7.7 earthquake struck central Myanmar. In this study, an aftershock catalog recorded by the Seismic Monitoring Center of the Thailand Meteorological Department (TMD) was used to analyze the characteristics of the aftershock sequence. The TMD network detected events to ML3.0 for the Sagaing Fault and Myanmar MW7.7 earthquake, with an additional 0.2 applied as a conservative lower bound. The majority (89%) of ML≥5.5 aftershocks occurred within 16 days of the mainshock. Epidemic-Type Aftershock Sequence modeling revealed that α=2.023, indicating a reduced capacity to trigger secondary aftershocks, while p=1.17, reflecting rapid decay. These slightly high α- and p-values may be due to supershear rupturing, the high slip rate of the Sagaing Fault, and warm crustal conditions. The difference in magnitude between the largest aftershock and mainshock was 1.0, which is consistent with regional historical sequences. The spatial distribution of aftershocks was controlled by the N-S-trending Sagaing Fault, and was closely related to the mainshock slip, fault geometry, and historical rupture zones. The spatial fractal dimension (DC=1.60) indicated a fractal structure, reflecting the complexity of the regional fault structure and the spatial distribution of small earthquakes. After the MW7.7 event, the south-central Sagaing Fault ruptured, except for the Bago segment. However, the northern end of the Bago segment has the potential to produce up to a MW7.0 earthquake. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=194060085
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      – Type: doi
        Value: 10.1016/j.eqs.2026.04.002
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      – Code: eng
        Text: English
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        PageCount: 17
        StartPage: 294
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      – SubjectFull: Earthquakes
        Type: general
      – SubjectFull: Geologic faults
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      – SubjectFull: Seismology
        Type: general
      – SubjectFull: Earthquake magnitude
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      – SubjectFull: Fractals
        Type: general
      – SubjectFull: Surface fault ruptures
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      – SubjectFull: Myanmar
        Type: general
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      – TitleFull: Aftershock characteristics of the Mw 7. 7 Myanmar earthquake, March 2025.
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            NameFull: Zhao, Xiaoyan
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            NameFull: Meng, Lingyuan
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            NameFull: Peng, Guanling
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              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
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