Velocity Contrast across the Zhaotong-Ludian Fault in Southwest China from the Analysis of Fault Zone Head Waves and Teleseismic <i>P</i>-Wave Arrivals

نویسندگان

چکیده

Abstract We image the Zhaotong-Ludian fault (ZLF) in southeastern margin of Tibetan plateau (SE plateau) using waveforms from local and teleseismic earthquakes recorded by 14 seismic stations. identify two types zone head wave (FZHW) clusters applying an automatic picking algorithm a horizontal particle motion analysis. The first type FZHWs shows linear time–distance moveout is only observed at stations on southeast side northeastern section ZLF. slope suggests average cross-fault velocity contrast ?2.5%. second exhibits constant both sides ZLF southwestern cluster located low-velocity zone. difference between northeast southwest segments also confirmed P-wave travel-time data. attribute prominent to lithological South China block Daliangshan subblock northwest fault. striking sections implies that nucleating one segment would hardly rupture through entire fault, which can significantly affect our estimates maximum magnitude future occurring

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ژورنال

عنوان ژورنال: Seismological Research Letters

سال: 2022

ISSN: ['0895-0695', '1938-2057']

DOI: https://doi.org/10.1785/0220210358