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All Journal JGISE-Journal of Geospatial Information Science and Engineering Jurnal Pengabdian dan Pengembangan Masyarakat
Ulinnuha, Hilmiyati
Departemen Teknik Geodesi, Fakultas Teknik, Universitas Gadjah Mada
Humanities Education Engineering Environmental Science Languange, Linguistic, Communication & Media Library & Information Science

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Journal : JGISE-Journal of Geospatial Information Science and Engineering

 1 
Analysis of the July 10th 2013 Tectonic Earthquake effect on the Coordinates Changes of Mentawai Segment Monitoring Station Hilmiyati Ulinnuha; Aris Sunantyo; Nurrohmat Widjajanti
Jurnal Geospasial Indonesia Vol 1, No 2 (2018): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jgise.39350

Abstract

Mentawai Segment is located in Mentawai Islands, Sumatra, Indonesia. This segment is a subduction zone between Indo-Australian plate and Eurasian plate. This subduction zone can lead to high potential of tectonic earthquake in Mentawai Segment. The high potential of tectonic earthquake has negative impact for the community, so it is necessary to monitor the risk of tectonic earthquake in Mentawai Segment. This monitoring can be done by using GPS data of monitoring station that spread in Mentawai Segment. Therefore, this research aims to analyze the effect of tectonic earthquake on the coordinate change of Mentawai Segment, so that it can reduce the risk of negative impact of tectonic earthquake in Mentawai Segment. This research use observation data of 10 continuous GPS monitoring station (Sumatran GPS Data Array / SuGAr) in Mentawai Segment. Day of observation data was day of year (doy) at the time of tectonic earthquake occurence on July 10, 2013. Data processing used GAMIT / GLOBK software. The results of this research indicate that the tectonic earthquake (July 10, 2013) affected coordinates changes of the SuGAr station significantly two hours after the tectonic earthquake occurred.
GPS Technology Implementation for Sangihe Islands' Movement Monitoring in 2017-2019 Hilmiyati Ulinnuha; Dwi Lestari; Leni Sophia Heliani; Nurrohmat Widjajanti; Cecep Pratama; Parseno Parseno; Krishna Fitranto Nugroho
Jurnal Geospasial Indonesia Vol 2, No 2 (2019): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jgise.51033

Abstract

Sangihe Islands belong to a complex tectonic area at the subduction of the Eurasian plate and the Philippine Sea. Sangihe subduction zones are complex subduction zone, so that there is a need for continuous movement monitoring. Previous research had been carried out to monitor movement of the Sangihe subduction zone, but no monitoring has been done in 2019. Therefore, this study aims to monitor movement of Sangihe subduction zones with the latest observation data.This study aims to obtain velocity of Sangihe Islands plate movement during 2017 to 2019. Observation was performed using 3 monitoring control points for 7 days in 2019. While observation data from 2017 to 2018 were obtained from previous studies. Observations was carried out using GNSS differential method technology. Loosely constrained of weighted parameter was performed in least square adjustment of GNSS data daily processing, while Kalman Filtering algorithm applied for combining multiyear GNSS data to estimate the velocity refer to ITRF 2014 using GAMIT/GLOBK.This study indicates that Sangihe Islands has horizontal movement to the Southeast with velocity vector of 1 to 2.16 cm/year. This results confirm the previous studies in that area.
Pemanfaatan Citra Side Scan Sonar untuk Identifikasi Objek Bawah Laut Eko Prayetno; Hilmiyati Ulinnuha
Jurnal Geospasial Indonesia Vol 3, No 1 (2020): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jgise.55158

Abstract

Lamong Bay waters are part of the Port of Tanjung Perak Surabaya. This port is included in one of the busiest ports in Indonesia. Therefore, a study is needed on the condition of the bottom waters and underwater infrastructure buildings to provide information on the safety of the shipping lanes and the landing of the lego anchor on the position of the underwater infrastructure. This study involves exploration activities such as the detection and sweeping of objects at the bottom of the sea and taking sediment samples using side scan sonar instruments and van veen grab sampler. This activity aims to identify the condition of objects of sea cables and pipelines in the waters of the Lamong Bay waters, evaluating the rules of immersion of submarine cables and pipelines in accordance with the Minister of Transportation Regulation No. PM 129 of 2016. The results of this activity will be in the form of a map of sea cables and sea pipes which will be attached to the Lamong Bay Field Painting Sheet. The submarine cable target recorded is in Line A with the cable target detected 2 (two) cable lines. Whereas the sea pipe is located at Lane B. The results of the inspection are to be placed on the Indonesian Sea Map No. 84 to determine the position of sea cables and  pipelines. Each of the submarine cable and pipelines target was analyzed by Minister of Transportation Regulation No. PM 129 of 2016 concerning the regulation of immersion of underwater buildings. The results of the submarine cable and pipelines analysis have met the installation standards even though they are at a shallow depth. This suitability is seen based on dictum 2 (two) rules of burial that burials do not apply to the position of the underwater buildings crossing each other.
Co-Authors Abdul Basith Aris Sunantyo Aris Sunantyo Bilal Ma'ruf Cecep Pratama Dedi Atunggal Dwi Lestari Dwi Lestari Dwi Lestari Eko Prayetno Heliani, Leni Sophia Krishna Fitranto Nugroho Maritsa Faridatunnisa Nurrohmat Widjajanti Nurrohmat Widjajanti Parseno Parseno Parseno Parseno Parseno Parseno Suci Tresna Novianti