التفاصيل البيبلوغرافية
| العنوان: |
Does a Damaged-Fault Zone Mitigate the Near-Field Impact of Supershear Earthquakes?—Application to the 2018 M_w 7.5 Palu, Indonesia, Earthquake |
| المؤلفون: |
Oral, Elif, Weng, Huihui, Ampuero, Jean-Paul |
| المصدر: |
Geophysical Research Letters, 47(1), Art. No. e2019GL085649, (2020-01-16) |
| بيانات النشر: |
American Geophysical Union |
| سنة النشر: |
2020 |
| المجموعة: |
Caltech Authors (California Institute of Technology) |
| مصطلحات موضوعية: |
supershear rupture, seismic wave propagation, dynamic rupture modeling, earthquakeâ€induced landslides, damagedâ€fault zones |
| الوصف: |
The impact of earthquakes can be severely aggravated by cascading secondary hazards. The 2018 M_w 7.5 Palu, Indonesia, earthquake led to devastating tsunamis and landslides, while triggered submarine landslides possibly contributed substantially to generate the tsunami. The rupture was supershear over most of its length, but its speed was unexpectedly slow for a supershear event, between the wave velocity V_s and Eshelby's speed √2V_s, an unstable speed range in conventional theory. Here, we investigate whether dynamic rupture models including a lowâ€velocity fault zone can reproduce such a steady supershear rupture with a relatively low speed. We then examine numerically how this peculiar feature of the Palu earthquake could have affected the nearâ€field ground motion and thus the secondary hazards. Our findings suggest that the presence of a lowâ€velocity fault zone can explain the unexpected rupture speed and may have mitigated the nearâ€field ground motion and the induced landslides in Palu. ; © 2020 American Geophysical Union. Received 2 OCT 2019; Accepted 23 DEC 2019; Accepted article online 3 JAN 2020. This work was supported by the French National Research Agency (ANR) through project FAULTS_R_GEMS (Grant ANRâ€17â€CE31â€0008) and Investmentsâ€inâ€theâ€Future project UCAJEDI (Grant ANRâ€15â€IDEXâ€01). We acknowledge Luis A. Dalguer for helpful comments that improved the content of this manuscript. All data needed to reproduce this work are available online: 2â€D and 3â€D wave propagation modeling tools can be found at the websites (https://github.com/jpampuero/sem2dpackTest and https://github.com/geodynamics/specfem3dTest). ; Published - Oral_et_al-2020-Geophysical_Research_Letters.pdf Submitted - Palu_paper_GRL_preprint.pdf Supplemental Material - grl60058-sup-0001-2019gl085649-figure_si-s01.pdf |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| العلاقة: |
https://doi.org/10.31223/osf.io/5nugqTest; https://github.com/jpampuero/sem2dpackTest; https://github.com/geodynamics/specfem3dTest; https://doi.org/10.1029/2019GL085649Test; oai:authors.library.caltech.edu:9135n-m2545; eprintid:100416; resolverid:CaltechAUTHORS:20191223-135553258 |
| DOI: |
10.1029/2019GL085649 |
| الإتاحة: |
https://doi.org/10.1029/2019GL08564910.31223/osf.io/5nugqTest |
| حقوق: |
info:eu-repo/semantics/openAccess ; Other |
| رقم الانضمام: |
edsbas.53B8D926 |
| قاعدة البيانات: |
BASE |
