晨间信号Morning Signal
《科学》 第392卷 第6799期 · 2026年5月14日 · 中文解读

结构破裂屏障导致海洋转换断层可预测的地震周期

Predictable seismic cycles result from structural rupture barriers on oceanic transform faults · J. Gong et al.
约 35 分钟Research Article Summaries在小程序里点播,20 到 60 分钟做好
这篇讲什么
本文分析了戈法尔转换断层上的两个屏障,这些屏障在过去三十年中阻止了约15次6级地震,并揭示了屏障的多股断层和横向偏移结构,表明损伤增强的孔隙度和膨胀强化机制控制着地震的准周期复发。
原文开头
Jianhua Gong1*, Wenyuan Fan2, Jeffrey J. McGuire3,4, Mark D. Behn5, Jessica M. Warren6, Emily Roland7, Margaret S. Boettcher4,8, John A. Collins4, Yajing Liu9, Christopher R. German4 Earthquakes of magnitude (M) >5.5 on oceanic transform faults (OTFs) repeatedly rupture the same locked patches, sometimes quasiperiodically. These patches are separated by “barriers” that halt earthquake propagation and slip mostly aseismically. However, the physical processes governing this systematic behavior remain unclear. We analyzed two barriers along the Gofar transform fault that have arrested ~15 M6 earthquakes over the past three decades. Ocean bottom seismometer data indicate that the barriers hosted intense microseismicity before the mainshocks and comprise multistrand faults and transtensional stepovers with 100- to 400- m lateral offset. …
摘自《科学》(Science)第392卷 第6799期 · 2026年5月14日,J. Gong et al.。仅引用开头一小段供了解文章,版权归原刊所有,全文请阅读原刊。
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