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Dive into the research topics where Didik Sugiyanto is active.

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Featured researches published by Didik Sugiyanto.


Journal of Geophysical Research | 2012

Isolating along-strike variations in the depth extent of shallow creep and fault locking on the northern Great Sumatran Fault

Takeo Ito; Endra Gunawan; Fumiaki Kimata; Takao Tabei; Mark Simons; Irwan Meilano; Agustan; Yusaku Ohta; Irwandi Nurdin; Didik Sugiyanto

The Great Sumatran Fault system in Indonesia is a major right-lateral trench-parallel system that can be divided into several segments, most of which have ruptured within the last century. This study focuses on the northern portion of the fault system which contains a 200-km-long segment that has not experienced a major earthquake in at least 170 years. In 2005, we established the Aceh GPS Network for the Sumatran Fault System (AGNeSS) across this segment. AGNeSS observes large displacements which include significant postseismic deformation from recent large megathrust earthquakes as well as interseismic deformation due to continued elastic loading of both the megathrust and the strike slip system. We parameterize the displacements due to afterslip on the megathrust using a model based on a rate- and state-dependent friction formalism. Using this approach, we are able to separate afterslip from other contributions. We remove predicted deformation due to afterslip from the observations, and use these corrected time series to infer the depth of shallow aseismic creep and deeper locked segments for the Great Sumatran Fault. In the northern portion of this fault segment, we infer aseismic creep down to 7.3 ± 4.8 km depth at a rate of 2.0 ± 0.6 cm/year. In the southwestern portion of the segment, we estimate a locking depth of 14.8 ± 3.4 km with a downdip slip rate of 1.6 ± 0.6 cm/year. This portion of the fault is capable of producing a magnitude 7.0 earthquake.


Archive | 2015

Geodetic and Geomorphic Evaluations of Earthquake Generation Potential of the Northern Sumatran Fault, Indonesia

Takao Tabei; Fumiaki Kimata; Takeo Ito; Endra Gunawan; Hiroyuki Tsutsumi; Yusaku Ohta; Tadashi Yamashina; Yoshio Soeda; Nazli Ismail; Irwandi Nurdin; Didik Sugiyanto; Irwan Meilano

We have conducted geodetic and geomorphic observations in the northernmost part of Sumatra, Indonesia to monitor strain accumulation in the vicinity of the northern Sumatran fault. Evaluation of the earthquake generation potential in this region is highly urgent because of a large fault slip rate, absence of major earthquakes for more than 100 years and recent Coulomb stress increase on the fault due to the 2004 Sumatra-Andaman earthquake (M w 9. 2). We have deployed Aceh GPS Network for the Sumatran Fault System (AGNeSS) since 2005. The data collected have been used for estimating slip/locking distribution of the Sumatran fault and constructing a comprehensive model for postseismic deformation after the 2004 event. Tectonic geomorphic features are also important to reveal long-term slip history of the fault. We have used high-resolution stereo-paired ALOS (Advanced Land Observing Satellite) PRISM (Panchromatic Remote-sensing Instrument for Stereo Mapping) satellite images to map the surface trace of the Sumatran fault and conducted field observations to ensure the trace by geomorphic and geologic evidence. We introduce preliminary results of the fault mapping together with a brief description of the crustal deformation field detected by GPS.


Archive | 2018

Evaluation of the 2012 Indian Ocean coseismic fault model in 3-D heterogeneous structure based on vertical and horizontal GNSS observation

Cecep Pratama; Takeo Ito; Takao Tabei; Fumiaki Kimata; Endra Gunawan; Yusaku Ohta; Tadashi Yamashina; Irwandi Nurdin; Didik Sugiyanto; Umar Muksin; Nazli Ismail; Irwan Meilano

Lack of observation network in the vicinity of oceanic intraplate earthquake lead the estimation of coseismic fault slip with high uncertainty. Satriano et al. [2] and Wei et al. [3] found NNE trending left-lateral slip as the primary features. In another hand, Yue et al. [4] and Hill et al. [5] proposed WNW trending right-lateral faults structure as the main characteristic. Here, we investigate the coseismic fault model that could explain the coseismic offset both vertical and horizontal in a 3-D heterogeneous earth structure. We constructed finite element model that include three-dimensional velocity structure, topography/bathymetry, spherical-earth and subducting slab. In this study, we employed scaling slip to adjust slip amount and total seismic moment. Instead of original slip amount, we preserve seismic moment as a basis comparison. Based on vertical and horizontal observation data, WNW trending right-lateral fault could fit better than NNE trending left-lateral fault. The present study demonstrates best-fit calculation using scaling slip optimized to the horizontal or vertical observation lead the both fault model worsen the misfit of vertical or horizontal component, respectively. This result analysis indicates a trade-off between vertical and horizontal component and reflects the importance of revisiting the fault slip modeling incorporating vertical and horizontal data equally.Lack of observation network in the vicinity of oceanic intraplate earthquake lead the estimation of coseismic fault slip with high uncertainty. Satriano et al. [2] and Wei et al. [3] found NNE trending left-lateral slip as the primary features. In another hand, Yue et al. [4] and Hill et al. [5] proposed WNW trending right-lateral faults structure as the main characteristic. Here, we investigate the coseismic fault model that could explain the coseismic offset both vertical and horizontal in a 3-D heterogeneous earth structure. We constructed finite element model that include three-dimensional velocity structure, topography/bathymetry, spherical-earth and subducting slab. In this study, we employed scaling slip to adjust slip amount and total seismic moment. Instead of original slip amount, we preserve seismic moment as a basis comparison. Based on vertical and horizontal observation data, WNW trending right-lateral fault could fit better than NNE trending left-lateral fault. The present study demonstrate...


Archive | 2018

Design of Web Based Fire Warning System Using Ethernet Wiznet W5500

Sri Safrina Dewi; Dedi Satria; Elin Yusibani; Didik Sugiyanto

Abstract Purpose – The purpose of this paper is to develop prototype of the web-based home fire early warning system using Wiznet W5500 Ethernet module. This system protocol helps users in sending information of fire through the internet with the internet of things (IoT) method using Wiznet Ethernet module as communication media to the user. Design/Methodology/Approach – This paper presents the design of web-based home fire early warning system using Wiznet W5500 Ethernet module. The system prototype is built using flame sensors, MQ-02 smoke sensors, and LM35 temperature sensors as input components. While on the processor side using Arduino Uno microcontroller as sensor data processing. Processed data is sent to the Ethernet module as a web server resulting in a web-based early warning information system with an alarm notification on the browser along with home location status information and sensor data. Findings – This research produces a prototype of the web-based home fire early warning system using Wiznet W5500 Ethernet module that has been able to provide notification to the security officer housing. Research Limitations/Implications – In the implementation of measurement, the information system only accesses one house detector or one fire location. Practical Implications – This research produces a prototype of the web-based home fire early warning system using Wiznet W5500 Ethernet module that has been able to distribute data of temperature, smoke, and fire. Originality/Value – The development of fire monitoring systems using flame sensors, smoke sensors and integrated temperature sensors in internet-based communication systems of things via the Internet W5500 does not appear to have been published yet.


Journal of Asian Earth Sciences | 2014

A comprehensive model of postseismic deformation of the 2004 Sumatra–Andaman earthquake deduced from GPS observations in northern Sumatra

Endra Gunawan; Takeshi Sagiya; Takeo Ito; Fumiaki Kimata; Takao Tabei; Yusaku Ohta; Irwan Meilano; Hasanuddin Z. Abidin; Agustan; Irwandi Nurdin; Didik Sugiyanto


Earth, Planets and Space | 2016

Co-seismic offsets due to two earthquakes ( M w 6.1) along the Sumatran fault system derived from GNSS measurements

Takeo Ito; Endra Gunawan; Fumiaki Kimata; Takao Tabei; Irwan Meilano; Agustan; Yusaku Ohta; Nazli Ismail; Irwandi Nurdin; Didik Sugiyanto


Journal of Asian Earth Sciences | 2017

Transient rheology of the oceanic asthenosphere following the 2012 Indian Ocean Earthquake inferred from geodetic data

Cecep Pratama; Takeo Ito; Ryohei Sasajima; Takao Tabei; Fumiaki Kimata; Endra Gunawan; Yusaku Ohta; Tadashi Yamashina; Nazli Ismail; Irwandi Nurdin; Didik Sugiyanto; Umar Muksin; Irwan Meilano


Archive | 2005

Slip Distribution of the 2004 Sumatra-Andaman Earthquake from Near-field GPS Observation

Meilano Irwan; Yusaku Ohta; Fumiaki Kimata; Toshihiro Ito; Hasanuddin Z. Abidin; M. A. Kusuma; D. Darmawan; Heri Andreas; Didik Sugiyanto


Journal of Aceh Physics Society | 2018

Potential Analysis of Thunderstorm Occurrence Using SWEAT Method at Meteorology Station Sultan Iskandar Muda

Ulfah Kurnia; Didik Sugiyanto; Rahmad Tauladani


Jurnal Natural | 2017

A PRELIMINARY STUDY ON AQUIFER IDENTIFICATION BASED ON GEO-ELECTRICAL DATA IN BANDA ACEH, INDONESIA

Didik Sugiyanto; Ibnu Rusydy; Marwan Marwan; Dian Mutia Hidayati; Asrillah Asrillah

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Irwan Meilano

Bandung Institute of Technology

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Endra Gunawan

Bandung Institute of Technology

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Ibnu Rusydy

Syiah Kuala University

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Mark Simons

California Institute of Technology

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