Moment magnitude of Myanmar earthquake on March 28,2025 from long-period seismic codaOA
On March 28,2025,a large earthquake struck central Myanmar and caused massive damage and casualties.The magnitude of the mainshock is a fundamental parameter that both the general public and scientific communities are concerned about.The coda moment magnitude(Mwo)is a new and reliable method for determining the magnitude of large earthquakes,using more than 10 hours of long-period coda waves.We determined the Mwo moment magnitude(with one standard error)to be 7.86±0.03 for the Myanmar earthquake,which is generally larger than the previous reports.The determination includes a small correction(0.02)from our systematic evaluation for smaller earthquakes MW<8.3.The Mwo of the Myanmar earthquake is comparable to that of the Kunlun earthquake,and is slightly smaller(0.15±0.03)than that of the 2008 Wenchuan earthquake.The differences are consistent with those from the Global Centroid-Moment-Tensor.
Tian Li;Xiaodong Song
State Key Laboratory of Deep Earth and Mineral Exploration,School of Earth and Space Sciences,Peking University,Beijing 100871,China Hebei Hongshan National Observatory on Thick Sediments and Seismic Hazards,Peking University,Beijing 100871,ChinaState Key Laboratory of Deep Earth and Mineral Exploration,School of Earth and Space Sciences,Peking University,Beijing 100871,China Hebei Hongshan National Observatory on Thick Sediments and Seismic Hazards,Peking University,Beijing 100871,China
天文与地球科学
2025 Myanmar earthquakemoment magnitudelong-period coda wave
《Earthquake Science》 2026 (3)
P.286-293,8
supported by the National Key R&D Program of China(No.#2022YFF0800601)by the China National Science and Technology Major Project(No.2024ZD1001101).
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