Article
Geosciences, Multidisciplinary
Yuji Itoh, Anne Socquet, Mathilde Radiguet
Summary: This study examines the impact of aseismic slip on the seismic rupture process using the 2014 Iquique earthquake sequence as a case study. The findings show that aseismic slip can delay the propagation of the mainshock and promote the occurrence of largest aftershocks. This suggests that slowly slipping faults can play a crucial role in controlling the occurrence of large earthquakes.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Duyuan Xu, Wenzheng Gong, Zhenguo Zhang, Jiankuan Xu, Houyun Yu, Xiaofei Chen
Summary: The 2016 Menyuan earthquake occurred near the Haiyuan fault system in the northeastern Tibetan plateau. The apparent source time functions (ASTFs) of this event were obtained using the empirical Green's function method, showing a bell shape with a duration of 3s. Dynamic rupture simulations revealed that the ASTFs can be explained by the self-arresting rupture model, indicating that the rupture propagation of this event may spontaneously terminate before reaching the barriers. This study contributes to understanding the stopping mechanism of moderate earthquake ruptures.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Urban Studies
Martin E. Pilka, Nicolai A. Sluka, Daniela Szymanska
Summary: The objective of this study is to evaluate the presence and sectoral structure of foreign TNCs in U.S. global cities. The sectoral analysis of foreign TNCs in these cities reveals interesting findings, including the balance between industrial and non-industrial companies in a post-industrial environment, the complex relationship between the international importance of a city and the sectoral composition of its transnational business segment, and the stronger concentration of foreign firms in key cities compared to secondary ones.
Article
Geochemistry & Geophysics
O. Lengline, J. Schmittbuhl, K. Drif, S. Lambotte, M. Grunberg, J. Kinscher, C. Sira, A. Schlupp, M. Schaming, H. Jund, F. Masson
Summary: Between November 2019 and July 2021, four earthquakes with local magnitudes equal to or greater than three were felt in Strasbourg, France. These earthquakes were caused by activities at the GEOVEN geothermal site in Vendenheim, located in the northern suburbs of Strasbourg. Our analysis of these earthquakes reveals the existence of a critically stressed fault that was responsible for three of the widely felt events. We also demonstrate the direct relationship between the source properties of these earthquakes and ground shaking observations at the surface.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
Grzegorz Kwiatek, Patricia Martinez-Garzon, Jorn Davidsen, Peter Malin, Aino Karjalainen, Marco Bohnhoff, Georg Dresen
Summary: We investigated induced seismicity caused by hydraulic stimulation in a geothermal well near Helsinki, Finland. The seismicity was monitored and analyzed, and it was found that there was no correlation between earthquake magnitudes during the stimulation. The interevent time statistics followed a Poisson distribution. The study suggests that the hydraulic stimulation did not result in earthquake interaction or prolonged seismic events.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Vladimir G. Kossobokov, Anastasia K. Nekrasova, Polina D. Schepalina
Summary: This study provides a multi-parametric description of earthquake activity for the 156 largest earthquakes worldwide between 1985 and 2020, offering quantitative evidence for understanding seismic processes and confirming the existence of spatiotemporal patterns and different regimes of regional seismic energy release. The analysis does not support universality in seismic energy release across different types of earthquakes and can be used to improve local time-dependent assessment of seismic hazard.
SURVEYS IN GEOPHYSICS
(2022)
Article
Geosciences, Multidisciplinary
Kou-Cheng Chen, Kwang-Hee Kim, Jeen-Hwa Wang
Summary: The data set of earthquake sequences in Taiwan shows that the larger the largest foreshock, the larger the mainshock. The distance from the largest foreshock to the mainshock slightly increases when the mainshock's magnitude is less than 10 km. The focal depth of the largest foreshock and the mainshock linearly increase for most event-pairs. The mainshock usually occurs within 5 days, with the highest probability of 1 day, after the largest foreshock. When the time interval exceeds 1 day, it slightly increases with the hypocentral distance.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Geochemistry & Geophysics
B. Gombert, J. C. Hawthorne
Summary: Slow earthquakes can have varying durations, moments, and slip and propagation speeds. This study examines tremor bursts with durations between 1 and 30 minutes, which are likely driven by short bursts of aseismic slip. Using a coherence-based technique, thousands of tremor bursts beneath Vancouver Island in Cascadia are detected, and 17 of the ruptures are examined. The study finds that tremor migrates at rates of 3-25 m/s, filling a gap in the spectrum of observed slow earthquakes and suggesting the existence of faster slip and propagation in smaller ruptures.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
Santosh Kumar, R. Chaitanya Kumar, Ketan Singha Roy, Sumer Chopra
Summary: The Gujarat region in India experienced a deadly earthquake in 2001, leading to the establishment of a seismic network. During the COVID-19 lockdown, the network's reliability was assessed and improvements in signal-to-noise ratio were observed. Additionally, the lockdown period helped identify natural sources of noise related to seismic activity in certain areas.
SEISMOLOGICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
Alireza Azarbakht, Hossein Ebrahimian, Fatemeh Jalayer, John Douglas
Summary: This study focuses on the robust seismicity forecasting for earthquake sequences, using an ETAS model to make probabilistic predictions while considering uncertainties in model parameters and variations in event sequences. The empirical results demonstrate that the adapted model can predict potentially damaging earthquakes during ongoing seismic sequences after a severe main shock, and provide short-term daily exceedance rates, revealing the characteristics of increased and decayed seismic hazard.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geosciences, Multidisciplinary
Min-Hee Kang, Ji-Won Moon, Byeong Je Kim, Ji-Bum Chung
Summary: This study examines the social movements initiated by women in South Korea, specifically in the online community "Pohang Mom Cafe", after a disaster. Results show that these mothers experienced a psychological change after the earthquake and grew more resilient to disaster risks by strengthening their responsibility bonds within the online community.
INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION
(2021)
Article
Geochemistry & Geophysics
Clarrie Macklin, Yoshihiro Kaneko, Jesse Kearse
Summary: Researchers found that shallow low-velocity layers and depth-dependent prestress are the main factors leading to changes in earthquake slip direction and formation of curved slickenlines through dynamic rupture simulations and field observations. These results provide new data support for understanding earthquake rupture evolution.
Article
Engineering, Geological
Jorge Macedo, Luis Vergaray, Curtis Jensen, Renzo Cornejo, Michael Jefferies
Summary: Part of the Harbor Bay Business Park in Alameda, California showed evidence of liquefaction during the 1989 Loma Prieta earthquake, but the recently constructed office buildings were not significantly damaged. Analysis based on critical state soil mechanics suggests that the presence of underlying Bay Mud played an important role in limiting the transmitted shear stress but not preventing liquefaction of the overlying sand fill. This behavior is consistent with the interaction between layers observed during the Canterbury earthquake sequence.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Environmental Sciences
Festus Victor Bekun, Festus Fatai Adedoyin, Daniel Balsalobre-Lorente, Oana M. Driha
Summary: This study examines the impact of air transport, foreign investment, and global energy demand on economic development, finding positive connections between foreign direct investment, urbanization, and electricity production with economic growth. It suggests that attracting clean foreign investment, increasing renewable energy sources, and regulating the tourism industry can promote sustainable economic growth in the studied economies.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Geochemistry & Geophysics
M. W. Herman, K. P. Furlong, H. M. Benz
Summary: This article investigates the relationship between surface faulting and subduction megathrust rupture in the 2016 Kaikoura earthquake in New Zealand. The study finds that the slip in the upper plate fault coincides with the megathrust rupture, and this extreme faulting is a result of increased Coulomb stress and basal decoupling.
