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PreprintCC BY 4.0arXiv

Supershear Rupture Indicator in Near-fault Particle Motion

  • Suli Yao
  • Hongfeng yang
  • Harsha S. Bhat
  • Hideo Aochi
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Abstract

Earthquake rupture propagation speed is an essential source parameter that fundamentally controls hazard and risk. In this paper, we develop and demonstrate the capability of a single near-fault seismic record in delineating earthquake rupture speed by inspecting displacement particle motion. We apply this method to near-fault strong-motion data in M7+ strike-slip earthquakes and identify diverse particle-motion signatures associated with subshear rupture, supershear rupture, supershear transition, initial rupture expansion, and potential multiple rupture fronts. This study highlights the value of near-fault observations for determining rupture speed.

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Cite

BibTeXRIS
BibTeX
@misc{yao2026supershear,
  title = {{Supershear Rupture Indicator in Near-fault Particle Motion}},
  author = {Suli Yao and Hongfeng yang and Harsha S. Bhat and Hideo Aochi},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2606.10843},
  eprint = {2606.10843},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2606.10843},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Supershear Rupture Indicator in Near-fault Particle Motion
AU  - Suli Yao
AU  - Hongfeng yang
AU  - Harsha S. Bhat
AU  - Hideo Aochi
PY  - 2026
DA  - 2026/11/03
PB  - arXiv
DO  - 10.48550/arxiv.2606.10843
UR  - https://arxiv.org/abs/2606.10843
AB  - Earthquake rupture propagation speed is an essential source parameter that fundamentally controls hazard and risk. In this paper, we develop and demonstrate the capability of a single near-fault seismic record in delineating earthquake rupture speed by inspecting displacement particle motion. We apply this method to near-fault strong-motion data in M7+ strike-slip earthquakes and identify diverse particle-motion signatures associated with subshear rupture, supershear rupture, supershear transition, initial rupture expansion, and potential multiple rupture fronts. This study highlights the value of near-fault observations for determining rupture speed.
ER  -