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All Journal Jurnal Meteorologi dan Geofisika Jurnal Fisika
Mochamad Aryono Adhi
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Earth & Planetary Sciences Energy Physics

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Virtual Tide Gauge Observation of the 2006 Pangandaran Tsunami Using COMCOT Version 1.7 Farikha Qurotun Uyun; Supriyadi; Sutikno; Mochamad Aryono Adhi; Hamzah Latief
Jurnal Fisika Vol. 14 No. 2 (2024): Jurnal Fisika 14 (2) 2024
Publisher : Universitas Negeri Semarang

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The 2006 Pangandaran tsunami was one of the most significant natural disasters in Indonesia, causing major damage to coastal infrastructure and extensive social impacts. This study aims to reconstruct the 2006 Pangandaran tsunami using topographic data from DEMNAS and bathymetry data from BATNAS by applying it to a fine grid size (nested model). The other purpose is to determine the validity of the model that has been made if verified using a comparison with the results of field surveys and calculations of Aida numbers. The research method used is by using topographic data from DEMNAS and bathymetry data from BATNAS as well as using earthquake mechanism data from Global CMT. Furthermore, it is simulated using COMCOT software version 1.7 as well as by creating a nested grid of 4 grids.  The obtained simulation results are then verified using field data and Aida numbers. The results of this study show that the earthquake with a magnitude of 7.7 Mw caused the movement of tectonic plates which resulted in a decrease and increase in sea level along the coast of Pangandaran. The simulation results have an Aida K value of 1.48 and an Aida
2D Numerical Modeling for Estimation of Run Up and Arrival Time of Tsunami at the Coast of Banyuwangi District Alif Aulia Baroroh; Supriyadi; Sutikno; Mochamad Aryono Adhi; Hamzah Latief
Jurnal Fisika Vol. 15 No. 1 (2025): Jurnal Fisika 15 (1) 2025
Publisher : Universitas Negeri Semarang

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The Banyuwangi tsunami was generated by an earthquake of magnitude 7.8 that struck the south coast of East Java with Mw 7.8 on June 3, 1994. The tsunami claimed the lives of more than 200 people, and severely damaged infrastructure, buildings and transportation facilities. Many studies have been conducted on the Banyuwangi tsunami, but not many have reviewed the validation of the maximum height compared to the results of field studies in the same year as the June 3, 1994 Banyuwangi tsunami. The study of Banyuwangi tsunami reconstruction aims to validate the maximum tsunami height of the model output compared to the results of field measurements by Tsuji in 1995. This study uses COMCOT v1.7 software with the nested model method. The results of the simulation of tsunami wave propagation that occurred every time period after the earthquake, showed that in snapshot layer 1 and layer 4 within 10 minutes the distribution of the earthquake expanded the tsunami wave propagation, within 30 minutes the tsunami wave propagation had entered several areas of the southern coast of East Java, within 35 minutes the tsunami wave propagation had reached land. The comparison ratio between model results and field measurements is K of 0.811998002 and
Spatiotemporal Modeling of Acid Rain Chemistry in Tropical Java Using Mixed-Effects Models: Deposition Patterns and Threshold Exceedance Ahmad Romli, Rita Hidayati; Mochamad Aryono Adhi; Adi Mulsandi
Jurnal Meteorologi dan Geofisika Vol. 26 No. 1 (2025)
Publisher : Pusat Penelitian dan Pengembangan BMKG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31172/jmg.v26i1.1170

Abstract

Acid deposition in tropical regions remains under-characterized despite rapid urbanization and increasing atmospheric emissions. This study examines the spatiotemporal variability of rainwater acidity across Java Island, Indonesia, based on five years (2019–2023) of event-based observations from thirteen monitoring stations. Weekly measurements of pH, SO₄²⁻, NO₃⁻, NH₄⁺, Cl⁻, and rainfall volume were analyzed using spatial mapping, seasonal stratification, and linear mixed-effects modeling. The results show that 47% of rain events exhibited pH values below 5.6, while sulfate and nitrate concentrations exceeded critical ecological thresholds in up to 34% of cases, particularly during monsoon transition periods. Although ammonium buffering was observed, it was often insufficient in urban areas. Rainfall volume was significantly associated with ion concentrations; however, episodic acidic deposition remained substantial even during periods of high precipitation. These findings highlight the dual role of tropical rainfall as both a cleansing mechanism and a vector for atmospheric pollutants and provide a scientific basis for incorporating acid deposition into Indonesia’s environmental monitoring and management programs.
Co-Authors Adi Mulsandi Ahmad Romli, Rita Hidayati Alif Aulia Baroroh Farikha Qurotun Uyun Hamzah Latief Supriyadi SUTIKNO