A multiple asymmetric bilateral rupture sequence derived from the peculiar tele-seismic P-waves of the 2025 Mandalay, Myanmar earthquake

Authors

DOI:

https://doi.org/10.26443/seismica.v4i1.1691

Keywords:

Earthquake rupture process

Abstract

A large strike-slip earthquake occurred in central Myanmar on March 28, 2025. The aftershock distribution suggests that the rupture of the mainshock propagated mainly to the south. However, a large-amplitude phase lasting 20 s, followed by a short-period pulse-like phase, were observed at the stations on the north side of the source, while on the south side, tremor-like phases with multiple peaks continued for 90 s. Using the potency density tensor inversion method, we explain the "unusual" waveform signature of the Myanmar earthquake by a multiple, asymmetric bilateral rupture, involving boomerang-like back-rupture propagation and supershear.

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2025-05-20

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Inoue, N., Yamaguchi, R., Yagi, Y., Okuwaki, R., Enescu, B., & Tadapansawut, T. (2025). A multiple asymmetric bilateral rupture sequence derived from the peculiar tele-seismic P-waves of the 2025 Mandalay, Myanmar earthquake. Seismica, 4(1). https://doi.org/10.26443/seismica.v4i1.1691

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Vol. 4 No. 1 (2025)

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Copyright (c) 2024 Naohiro Inoue, Ryo Yamaguchi, Yuji Yagi, Ryo Okuwaki, Enescu Bogdan, Tira Tadapansawut

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