A5053274756- earthquake and tectonic studies
- Geological and Geophysical Studies
- High-pressure geophysics and materials
- Seismic Waves and Analysis
- Seismology and Earthquake Studies
- Earthquake Detection and Analysis
- Seismic Imaging and Inversion Techniques
- Rock Mechanics and Modeling
- Drilling and Well Engineering
- Hydraulic Fracturing and Reservoir Analysis
- Geotechnical and Geomechanical Engineering
- Geological and Geochemical Analysis
- CO2 Sequestration and Geologic Interactions
- Geological Modeling and Analysis
- Geophysical Methods and Applications
- Geotechnical and construction materials studies
- Reservoir Engineering and Simulation Methods
- Geophysics and Gravity Measurements
- High-Velocity Impact and Material Behavior
- Earthquake and Disaster Impact Studies
- Geodetic Measurements and Engineering Structures
- Seismic Performance and Analysis
- Geothermal Energy Systems and Applications
- Mining and Gasification Technologies
- Geotechnical Engineering and Soil Mechanics
Bandung Institute of Technology
2013-2025
Australian National University
2022
Ministry of Natural Resources and Environment
2021
Karlsruhe Institute of Technology
2014-2017
Abstract The Eastern Indonesia is situated at the convergence of Alpine-Himalayan orogenic belt and Circum-Pacific belt, where three tectonic plates generates an area significant geological complexity neotectonic activity. This research aims to ascertain stress regime influencing Seram-Buru its implications on fault instability within region. study encompasses islands Seram Buru, Maluku, utilizing earthquake catalogs focal mechanism data obtained from International Seismological Center (ISC)...
Abstract The condition and amount of earthquake data in the world continues to increase along with increasing capacity coverage global seismic network. Therefore, there is a need for technology that can accommodate process it quickly help improve processing efficiency identifying wave phases. This development more advanced systems, such as disaster early warning systems Indonesia. In this study, we apply artificial intelligence, namely PhaseNet GaMMA, probabilistic location determination...
Abstract The island of Lombok in Indonesia is located between the Indo-Australian and Eurasian subduction trenches Flores back-arc thrust, making it vulnerable to earthquakes. On 29 July 2018, a significant earthquake Mw 6.4 shook this region was followed by series major earthquakes (Mw>5.8) on 5, 9, 19 August, which led severe damage northern area. In study, we attempt reveal possible cause sequences 2018 based aftershock monitoring data. Twenty stations were deployed record waveform...
Abstract The Central and East Java region, which is part of the Sunda Arc, has relatively high seismic rates due to convergence two major tectonic plates in Indonesian region; i.e., Indo-Australian Plate subducting under Eurasian Plate. Many devastating earthquakes have occurred this area as a result interaction between these plates. Two examples are 1994 Banyuwangi earthquake (Mw 7.6) 2006 Yogyakarta 6.3). This study aims determine precise locations analyze pattern distribution Java,...
The Palu-Koro fault in Central Sulawesi, Indonesia, is known for significant seismic activity, including earthquakes of Mw 6.3 on 18 August 2012, and 7.5 2018. Although important understanding stress transfer hazard, detailed subsurface geometry, particularly dip angle, remains poorly characterized. This study applies Bayesian moment tensor analysis to 19 new focal mechanism solutions from the 2012 event, with a minimum magnitude 3.8, update geometry Palu-Saluki segment. updated has value...
Abstract Recent borehole seismic deployments conducted along the Baribis Fault in northwestern Java reveal that it may be active. In this study, we exploit these data to locate proximal earthquakes using a relative relocation technique, estimate their moment magnitudes spectral fitting method and compute focal mechanisms via waveform inversion. We observe seismicity eastern part of fault is significantly higher than west, where previous GPS study region south Jakarta demonstrated existence...
Abstract Significant earthquakes on the island of Sumatra, Indonesia, have predominantly been with a thrust mechanism that occurred due to subduction process and seismotectonics near coastal cities West South which could be affected by triggered these seismic sources. We compared Seismic Hazard Function (SHF) two Sumatra: Bengkulu Padang. The results showed SHF is higher than Estimated earthquake hazards are presented in form hazard maps expressed as PGA 10% rate exceedance probability 50...
Realizing an effective earthquake early warning system (EEWS) in the case of extensive regions and noisy signals is challenging, particularly East Java, Indonesia. This letter proposes rapid detection p-wave arrival determination earthquake’s hypocenter magnitude using deep learning. The Ncheck algorithm used for noise handling picking p-arrival on a multistation waveform as form target window prediction (PTWP). Then, multitarget regression (MTR) with hard-shared orthogonal optimization...
The Agung-Batur Volcanic Complex (ABVC), part of the Sunda volcanic arc, is source some most hazardous activity in Indonesia. ABVC has undergone many small (VEI 1-2) eruptions since historical records began early 19th century, but Mt. Agung experienced much larger 5) eruptions, both modern (1963) and (1843) eras, as well several times during past 2000-3000 years. 1963 eruption caused more than 1000 deaths, a recent 2017 evacuation 140,000 people. Delineating magma structure beneath an...
SUMMARY We develop and present a 3-D seismic velocity model of the source region 2018 Lombok, Indonesia earthquakes by using local earthquake tomography. The data consist 28 728 P- 20 713 S-wave arrival times from 3259 events which were recorded stations. results show that most significant occur to edge high-velocity regions. interpret these represent coherent blocks Flores Oceanic Crust underthrusting Lombok. At depths shallower than nucleation area largest earthquake, many triggered...
Abstract On September 26, 2019, an Mw 6.5 earthquake occurred 23 km northeast of Ambon City, Indonesia, followed by numerous aftershock series related to a complex fault network reactivation in the and Seram region. Using moment tensor inversion, we identify kinematics based on focal mechanism solution 20 aftershocks with > 3.2 analyze sequence from both solutions spatiotemporal seismicity. The MTs revealed three different characteristics reactivation: (i) 35 long N-S oriented main...
Abstract The North Sulawesi subduction zone is characterized by southward of the Celebes Sea slab to a depth ∼250 km, mainly overlying Sangihe that subducts west from Molucca and penetrates mantle transition zone. palaeo‐subducted Sula dips northward partially underlies both slabs. Adjacent zones with horizontal overlapping subducting slabs in upper have unclear dynamic interactions. An extensive strike‐slip fault forms western boundary active zone, providing an ideal setting study flow...
Abstract A destructive shallow earthquake with a magnitude of 5.6 struck Cianjur, West Java, Indonesia on November 21, 2022. This resulted in 602 casualties and the collapse over 67,504 residences. The day after mainshock, we deployed 19 temporary seismic stations to monitor aftershocks for period 30 days. We manually picked arrival times 4499 P-waves 3419 S-waves determined locations 514 events. Following velocity model update, phase refinement through waveform cross correlation, relocation...
Abstract The geological setting of Jakarta and its immediate surroundings are poorly understood, yet it is one the few places in Indonesia that impacted by earthquakes from both Java subduction zone active faults on land. In this study, a borehole seismic experiment with low noise characteristics was deployed to record activity ~ E-W oriented Baribis Fault, which 130 km long, passes south Jakarta, only 20 away at nearest point. A primary objective study determine whether fault seismically...
This study intends to evaluate the possible correlation between dimension (DC) and seismic moment rate for different late Quaternary active fault data, shallow crustal earthquakes, GPS on island of Sumatra Probabilistic Seismic Hazard Analysis (PSHA). The seismicity smoothing was applied estimate DC faults (DF) earthquake data (DE) then correlate that with b-value, which will be used identify hazard functions (SHF) along Fault Zone (SFZ). based calculated by is estimated pre-seismic...
A destructive earthquake (Mw 6.1) struck Pasaman, West Sumatra, Indonesia, on 25 February 2022, resulting in at least 18 deaths and damage to 1765 buildings. Our relocated foreshock, mainshock, aftershocks their source mechanisms reveal a previously unknown ∼20 km long segment of the Sumatran Fault as result dextral strike-slip motion (strike N132oE dip 72oSW) along what we have called Kajai Fault. The inverted rupture model indicates single, compact asperity with an approximate depth range...
We have successfully conducted the first ambient noise tomography on island of Lombok, Indonesia using local waveform data observed at 20 temporary stations. Ambient was used to delineate seismic velocity structure in upper crust. The were recorded from August 3rd September 9th, 2018, short-period and broadband sensors. There are 185 Rayleigh waves retrieved cross-correlating vertical components seismograms. frequency-time analysis (FTAN) acquire interstation group dispersion curves. Group...
A seismic hazard study and analysis of the megathrust source off west coast North Sumatra, Indonesia, were conducted based on estimated horizontal crustal strain using surface displacement data. This area was selected due to availability pre- co-seismic Global Positioning System (GPS) data for 2005 Nias–Simeulue M w 8.6 event. aimed estimate function (SHF), which is expressed as peak ground acceleration (PGA) versus probability exceedance (PE), a 500 years return period GPS The model event...