A5103025004- earthquake and tectonic studies
- Seismology and Earthquake Studies
- High-pressure geophysics and materials
- Earthquake Detection and Analysis
- Geological and Geophysical Studies
- Geological and Geochemical Analysis
- Geophysics and Gravity Measurements
- Seismic Waves and Analysis
- GNSS positioning and interference
- Seismic Imaging and Inversion Techniques
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Inertial Sensor and Navigation
- Antenna Design and Analysis
- Antenna Design and Optimization
- Electromagnetic Compatibility and Measurements
- Geological and Tectonic Studies in Latin America
- Methane Hydrates and Related Phenomena
- Japanese History and Culture
- Botany and Geology in Latin America and Caribbean
- Geophysics and Sensor Technology
- Landslides and related hazards
- Advanced SAR Imaging Techniques
- Earthquake and Disaster Impact Studies
- Real-time simulation and control systems
- Hydraulic Fracturing and Reservoir Analysis
Nagoya University
2016-2025
Hiroshima University
2022
Graduate School USA
2014-2020
Volcano Corporation (United States)
2016-2018
California Institute of Technology
2009-2011
Kyoto University
1991-2002
Kyushu University
1999-2000
Ministry of Internal Affairs and Communications
1994
Mitsubishi Corporation (United States)
1992
Energy Institute
1991
The Great Sumatran Fault system in Indonesia is a major right‐lateral trench‐parallel that can be divided into several segments, most of which have ruptured within the last century. This study focuses on northern portion fault contains 200‐km‐long segment has not experienced earthquake at least 170 years. In 2005, we established Aceh GPS Network for System (AGNeSS) across this segment. AGNeSS observes large displacements include significant postseismic deformation from recent megathrust...
Abstract The movement and deformation of the Earth’s crust upper mantle provide critical insights into evolution earthquake processes future potentials. Crustal can be modeled by dislocation models that represent faults in as defects a continuum medium. In this study, we propose physics-informed deep learning approach to model crustal due earthquakes. Neural networks continuous displacement fields arbitrary geometrical structures mechanical properties rocks incorporating governing equations...
Along the Java trench Australian–Oceanic plate is moving and pushing onto subducting beneath continental crust at a relative motion of about 70 mm/yr in NNE direction. This subduction-zone process imposed tectonic stresses on fore-arc region offshore land Java, thus causing formation earthquake fault zones to accommodate movement. Historically, several large earthquakes happened including West Java. research use GPS surveys method study inter-seismic deformation three active faults (i.e....
We analyze geodetic observation data associated with the 2011 Tohoku Earthquake to estimate coseismic and early postseismic fault slip distribution on Pacific plate interface. The maximum moment magnitude of main shock are about 60 m Mw 9.0, respectively. location patch is complementary source region large earthquakes at least for those which have occurred during last 100 years, was corresponded a release stress accumulation 700 years Source regions 1936, 1938, 1978 considered been...
Periodic ocean tides continually provide a cyclic load on Earth's surface, the response to which can be exploited new insights into interior structure. We used geodetic observations of surface displacements induced by tidal loads constrain depth-dependent model for crust and uppermost mantle that provides independent estimates density elastic moduli below western United States nearby offshore regions. Our require strong gradients in both shear at top bottom asthenosphere but no discrete...
Since the 2004 Sumatra–Andaman earthquake (M w 9.2), northwestern part of Sumatran island has been a high seismicity region. To evaluate seismic hazard along Great fault (GSF), we installed Aceh GNSS network for system (AGNeSS) in March 2005. The AGNeSS observed co-seismic offsets due to April 11, 2012 Indian Ocean 8.6), which is largest intraplate recorded history. offset at site was approximately 14.9 cm. Two M 6.1 earthquakes occurred within 2013, one on January 21 and other July 2. We...
Abstract Along the Nankai Trough of southwest Japan, large‐magnitude interplate earthquakes ( M > 8) have occurred repeatedly, with recurrence intervals approximately 100 years. It is essential to estimate more precisely spatial distribution coupling; that is, along‐strike and along‐dip heterogeneity coupling ratio defined as slip deficit rate divided by plate convergence rate, for understanding mechanisms and/or assessing potential future mega in this region. Recently, seafloor Global...
Over the last two decades, Semarang, located in central region of Java island, Indonesia, has been undergoing significant land subsidence. Mainly attributed to reservoir compaction and fluid extraction, this subsidence pronounced effects coastal regions. However, existing study on details its application accurately depict present circumstances insufficient. Utilizing new small baseline subset technique C-band SAR data from 2015 2022, delineates spatial boundaries Semarang surrounding areas....
Abstract Methods for modeling crustal deformation related to earthquakes and plate motions have been developed incorporate complex structures multi‐fidelity observations. A machine learning approach called physics‐informed neural networks (PINNs), which can solve both forward inverse problems of physical systems, was proposed applied the simulations antiplane deformation. Here, we aimed extend PINN in two directions: (a) inplane deformation, is typically used subduction zones, (b) inversion...
We determine the spatiotemporal distribution of slip (or deficit) on subduction interface Nankai trough over an entire earthquake cycle using geodetic data (including leveling, triangulation, and trilateration, sea level, GPS surveys) obtained during past 100 years in southwest Japan. develop a new inversion method that accounts for long‐term crustal deformation, coseismic (earthquake) displacements, stress relaxation viscoelastic asthenosphere. From this analysis we obtain model shows...
Abstract Surface mass loads generate a rich spectrum of deformation responses in the solid Earth that might be exploited to probe material properties crust and mantle. Here we present detailed examination load‐induced surface displacements their sensitivities systematic perturbations elastic structure. We compute Love numbers displacement load Green's functions (LGFs) by integrating equations motion for spheroidal radially heterogeneous self‐gravitating Earth. Sensitivity kernels are derived...
Research Article| June 05, 2018 Coseismic Slip Distribution of the 2 July 2013 Mw 6.1 Aceh, Indonesia, Earthquake and Its Tectonic Implications Endra Gunawan; Gunawan aFaculty Mining Petroleum Engineering, Bandung Institute Technology (ITB), Jalan Ganesha 10, Bandung, West Java 40132, endra@lppm.itb.ac.id Search for other works by this author on: GSW Google Scholar Sri Widiyantoro; Widiyantoro Shindy Rosalia; Rosalia Mudrik Rahmawan Daryono; Daryono bIndonesian Science (LIPI), Cisitu,...
The Knoop hardness anisotropy and plastic deformation markings around the DPH indentation were investigated for an Mn‐Zn ferrite single crystal. values, which depended primarily on crystallographic direction, represented a standard stereographic triangle. was maximum in <001> direction minimum <111> <011> directions. patterns of show that deforms plastically at room temperature by {110} <110> {111} slip.
Repeated precise leveling in the earthquake swarm area of Ontake, central Japan has revealed uplift 3–6 mm proximity to epicentral region most active cluster 2002–2004. Although is small, vertical displacement significant even considering error. This associated with increases 3He/4He ratios and CO2 δ13C values at a mineral spring region, indicating an upper mantle contribution. A low resistivity depth 2 km beneath also been inferred, suggesting that observed related changes shallow...
Abstract Lombok Island was hit by a series of earthquakes in July and August 2018 with magnitude 6 class. This resulted fatalities material losses that even reached Sumbawa to the east Island. The earthquake triggered Flores back arc thrust resulting ground deformation. Ground deformation can be identified satellite-based remote sensing method. Sentinel-1A Sentinel-1B satellites are two carrying C-band SAR sensors temporal resolution 12 days each for same orbit, difference time between is...