Earthquake damage patterns resolve complex rupture processes. The 2016 M7.8 Kaikoura earthquake

Yann Klinger, Kurama Okubo, Amaury Vallage, Johann Champenois, Arthur Delorme, Esteban Rougier, Zhei Lei, Earl Knight, Antonio Munjiza, Claudio Satriano, Stephane Baize, Robert M. Langridge, & Harsha S. Bhat

Submitted August 8, 2018, SCEC Contribution #8336, 2018 SCEC Annual Meeting Poster #124

Fracture damage patterns around faults induced by dynamic earthquake rupture are an invaluable record to clarify the rupture process on complex fault networks. The 2016 Mw 7.8 KaikĊura earthquake in New Zealand has been reported as one of the most complex earthquakes ever documented that ruptured at least 15 crustal faults. High-resolution optical satellite image displacement maps provide distinctive profiles of displacement across the faults, and helps visualize the off-fault damage pattern. They are combined with field observation and coupled with a numerical tool that captures the dynamics of the rupture and simultaneous activation of off-fault damage, to allow the determination of the most likely rupture scenario. This study demonstrates that complex rupture processes can be explained in a rather simple way via a synergetic combination of state-of-the-art observation and first principle physics-based numerical modeling of off-fault damage

Key Words
surface rupture, optical correlation, damage modeling

Citation
Klinger, Y., Okubo, K., Vallage, A., Champenois, J., Delorme, A., Rougier, E., Lei, Z., Knight, E., Munjiza, A., Satriano, C., Baize, S., Langridge, R. M., & Bhat, H. S. (2018, 08). Earthquake damage patterns resolve complex rupture processes. The 2016 M7.8 Kaikoura earthquake. Poster Presentation at 2018 SCEC Annual Meeting.


Related Projects & Working Groups
Tectonic Geodesy