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Suryo Hespiantoro
PPSDM Geominerba, KESDM
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IDENTIFIKASI ZONA SESAR MENGGUNAKAN PENDEKATAN GEOMORFOLOGI TEKTONIK DAN PEMETAAN GEOLOGI DI DESA BAN, KABUPATEN KARANGASEM, BALI Ida Bagus Oka Agastya; Putu Diyan Diwyastra; Suryo Hespiantoro
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 7 No 1 (2022): Jurnal Geominerba 2022
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1435.898 KB) | DOI: 10.58522/ppsdm22.v7i1.53

Abstract

This study focus on the movement of the fault that caused an earthquake on October 16, 2021 at 03:18:23 WITA with an earthquake magnitude of 4.8 Mw. The epicenter of the earthquake on land was at coordinates 115.45° East Longitude and 8.32° South Latitude with a depth of 10 km. The purpose of this study was to identify the presence of an active fault zone and to determine the fault kinematics in Ban Karangasem. The method used is SRTM DEM Image Analysis, Tectonic Geomorphology Approach, and Geological Mapping. Secondary data collected by GIS (Geographical Information System), and primary data collected by field surveying to observe the existing deformation and topography to determine the geometry and kinematics of an active fault. Focal Mecanism Analysis also used to determine the kinematics active fault, data sources published by BMKG. The results showed there are geological structures in the Buyan Beratan and Batur Purba Formation (Qpvb) and the Agung Volcano Formation (Qhva) in the study area. The geological structure is in the form of shear dan gash fracture, right slip fault, left normal slip fault, and left slip fault. The fault is classified as an active fault and cuts young rock, with an estimated fault zone length of 18 km with 5 fault segments. The existence of this fault zone is influenced by subduction activities in the south of Bali Island between the Eurasian Continental Plate and the Indo-Australian Ocean Plate.
DAMPAK GEMPA BUMI LOMBOK TAHUN 2018 Supartoyo; Rahayu Robiana; Merry Christina Natalia; Suryo Hespiantoro
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 5 No 1 (2020): Jurnal Geominerba - 2020
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7250.547 KB)

Abstract

A series of earthquakes with the mainshock on July 29th, 2018, August 5th, 2018 and August 19th, 2018 occurred in Lombok island. These earthquake has caused 559 fatalities, 1,478 people injured and 185.483 of buildings damaged in the Lombok and Sumbawa island. All type of earthquake hazards occurred namely ground shaking, minor fault surface rupture and collateral hazard such as liquefaction and landslides. Earthquake shaking felt strong in Lombok Utara and Lombok Timur with earthquake intensity scale of VIII MMI (Modified Mercally Intensity). Earthquake on July 29 th , 2018 with magnitude of M 6,4 result rupture zone 218,7762 km2, earthquake on August 5 th, 2018 and onAugust 19th, 2018 with magnitude of M 7,0 result rupture zone 758,5776 km2.
PEMANTAUAN PERGERAKAN TANAH PADA JEMBATAN TOL SEMARANG–SOLO (JEMBATAN PENGGARON) MENGGUNAKAN GPS–REAL TIME KINEMATIC Antonius Alex Harmoko; Suryo Hespiantoro
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 4 No 2 (2019): Jurnal Geominerba 2019
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3438.667 KB) | DOI: 10.58522/ppsdm22.v4i2.73

Abstract

According to a report from PT Trans Marga Jateng in March 2011, there was a change in the condition of the Penggaron Bridge located in the Semarang–Solo toll road Km. 20–21. These changes are indicated due to the Landslide, resulting in erosion and subsidence on the east side of the Penggaron bridge. As a result of the ground movement arises fractures in the expansion joint on the right side and there is a decrease in soil. Based on this, monitoring the movement of the soil by studying geological data, the occurrence of soil movements, geomorphology, water, rainfall, land use and installation of stakes. The method used in the form of a sliding stake measured using the Global Position System (GPS) - Real-time Kinematic (RTK) to get the position vector with high accuration. The results show that there are several points on the sliding stakes which show a change between 0.7–69 cm at 6 points of stakes. Horizontal shift shows the direction of the vector to the south and southeast, and vertically the magnitude of the change in peg increase ranges from 2–13 cm and and decrease of stakes around 0.7–17.5 cm for 10 months periods from February until November 2018.
ANALISIS GEOMORFOLOGI KAWASAN KAMPUS LAPANGAN PPSDM GEOMINERBA DAN SEKITARNYA Suryo Hespiantoro; Aperta Ledy Alam
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 4 No 1 (2019): Jurnal Geominerba 2019
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6777.829 KB) | DOI: 10.58522/ppsdm22.v4i1.85

Abstract

The PPSDM Geominerba Field Campus, is located in Gunung Masigit Village, Citatah Subdistrict, West Bandung Regency, West Java Province. The Campus lies on dominantly carbonate rocks area and cropout volcanic rocks at some other locations, that are formed different morphologies. The rocks composition and rocks physics are involving to constructed the morphology in this area. Based on the slope condition, landscape, and rocks composition, the landscape on PPSDM Geominerba Field Campus and it surrounding, divided into 2 (two) Geomorphology Units. First, Karst Morphology Unit (K2), 70% - 140% slope percent, very steep to almost vertical slope, and the area is constructed by dominantly coral limestone, and a littie bit of massive and crystalline limestones. Second, Denudational Geomorphology Unit (D2), 15% - 30% slope percent, moderately steep slope and the area is constructed by breccias and sandstone volcanic rocks, that reserved ground water or as aquifer layers in PPSDM Geominerba Field Campus and it surrounding. The result of this geomorphology study can be used for environment and geological hazards training materials.
POTENSI GEMPA BUMI DAERAH LEBONG, PROVINSI BENGKULU Supartoyo; Nia Kurnia Praja; Noviardi Titis Praponco; Suryo Hespiantoro
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 3 No 2 (2018): Jurnal Geominerba - 2018
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58522/ppsdm22.v3i2.88

Abstract

Lebong is an area in Indonesia that is prone to the earthquake caused by the subduction zone in the sea and active fault on the land. The morphotectonic analysis and the source of the destructive earthquake show that the earthquake in Lebong area is caused by the active faults of Ketaun segment, Sumatra fault, and Pelabai fault. Ketaun segment of Sumatra fault caused a destructive earthquake in 1952, while Pelabai fault caused a destructive earthquake in 2017. The destructive earthquake on Desember 6, 2017 gave us a lesson on the importance of themitigation effort in Lebong area. The mitigation effort can minimize the impact of the earthquakes that may be repeated in the future.
Co-Authors Antonius Alex Harmoko Aperta Ledy Alam Ida Bagus Oka Agastya Merry Christina Natalia Nia Kurnia Praja Noviardi Titis Praponco Putu Diyan Diwyastra Rahayu Robiana Supartoyo