2025-05-26 筑波大学
解析対象地域と解析結果
＜関連情報＞
- https://www.tsukuba.ac.jp/journal/biology-environment/20250526140000.html
- https://www.tsukuba.ac.jp/journal/pdf/p20250526140000.pdf
- https://seismica.library.mcgill.ca/article/view/1691
2025年ミャンマー地震における特異な遠地実体波P波から得られた複数の非対称的なバイラテラル破壊シーケンス A multiple asymmetric bilateral rupture sequence derived from the peculiar tele-seismic P-waves of the 2025 Mandalay, Myanmar earthquake
Naohiro Inoue,Ryo Yamaguchi,Yuji Yagi,Ryo Okuwaki,Enescu Bogdan,Tira Tadapansawut
Seismica Published:2025-05-20
DOI:https://doi.org/10.26443/seismica.v4i1.1691
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.
