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Alfiandy, Solih
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Journal : Buletin GAW Bariri ( BGB)

 1 
Identifikasi Klasifikasi Jenis Tanah Berdasarkan Nilai Kecepatan Gelombang Geser Vs30 di Daerah Bekasi Rahman, Aditya Setyo; Sutiyono, Sutiyono; Cindiwati, Cindiwati; Alfiandy, Solih
Buletin GAW Bariri (BGB) Vol 5 No 2 (2024): BULETIN GAW BARIRI
Publisher : Stasiun Pemantau Atmosfer Global Lore Lindu Bariri - Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31172/bgb.v5i2.121

Abstract

The complex geological and tectonic conditions of Bekasi are interesting to study the soil layers for sustainable development. This research was conducted to analyze soil types in the Bekasi area based on the USGS topographic Vs30 value. The data used were 613 research location points with a distance of approximately 1 km. The results showed that the Vs30 value in the Bekasi area ranged from 125.5479965 m/s to 316.0310059 m/s. Based on SNI 1726:2019, the entire Bekasi area is classified as soft to medium soil types. The majority of all sub-districts in Bekasi have a soft soil type classification, such as in the areas of Muaragembong, Cabangbungin, Babelan, Tarumajaya, Tambelang, Sukatani, Pebayuran, Kedung Waringin, and parts of Tambun. The medium soil type classification is in the southern part of Tambun sub-district, a small part in the southern part of Tambelang and Sukatani sub-districts, and a small part in the north and south of Muaragembong sub – district.
Analisis Potensi Pergerakan Tanah Berdasarkan Ground Shear Strain Untuk Wilayah Bekasi Rahman, Aditya Setyo; Sutiyono, Sutiyono; Wardaningsih, Kuurnia; Istofiyah, Istofiyah; Cindiwati, Cindiwati; Alfiandy, Solih
Buletin GAW Bariri (BGB) Vol 5 No 2 (2024): BULETIN GAW BARIRI
Publisher : Stasiun Pemantau Atmosfer Global Lore Lindu Bariri - Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31172/bgb.v5i2.122

Abstract

This study analyzes the Ground Shear Strain (GSS) values and predicts earthquake vibration phenomena in the Bekasi area. The results show that the GSS values are relatively low (0.14 - 0.20), indicating a low level of vulnerability to earthquake shaking. At PGA 0.22 - 0.302 g, it is predicted that only the wave vibration phenomenon will occur (ground vibration is felt, not damaging). Despite the low vulnerability level, it is important to remain vigilant and carry out earthquake mitigation, such as building earthquake-resistant structures and preparing evacuation plans.
Kajian Awal : Prediksi Kabut Berdasarkan Data Observasi di Wilayah Bandara Zainuddin Abdul Madjid Dewita, Anggi; Alfiandy, Solih
Buletin GAW Bariri (BGB) Vol 5 No 2 (2024): BULETIN GAW BARIRI
Publisher : Stasiun Pemantau Atmosfer Global Lore Lindu Bariri - Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31172/bgb.v5i2.135

Abstract

The reduction in visibility due to wet particles (fog and mist) is a phenomenon that can occur at Zainuddin Abdul Madjid Airport (ZAM). This event is quite difficult to predict using NWP models because the physical processes involved in its formation are very complex. This study aims to determine the threshold parameters that can be used as a forecasting guide to predict the occurrence of fog. The data used is from January 2024, with parameters assessed from METAR, AWOS, and Fklim71, including wind speed, temperature, dew point, cloud cover, and maximum temperature. The threshold values for each parameter will be determined and tested using a dichotomous verification method to obtain the accuracy value. Based on the analysis, fog in January 2024 formed early in the morning if there was precipitation during the afternoon, with the average wind speed at night being < 1 knot, the temperature difference between maximum temperature and air temperature after sunset being > 4.5°C, and the dew point depression at 17:00 UTC being below 1°C. In January 2024, a dichotomous verification was carried out, and the result showed an accuracy of 87%. Forecasting using this method is not 100% accurate.
Analisis Nilai Percepatan Tanah Maksimum dan Klasifikasi Kelas Situs di Kota Serang Provinsi Banten Widjayanti, Retno Yogi; AL HS, Usholl Auli; Rahman, Adtya Setyo; Permana, Dimas; Alfiandy, Solih
Buletin GAW Bariri (BGB) Vol 6 No 1 (2025): BULETIN GAW BARIRI
Publisher : Stasiun Pemantau Atmosfer Global Lore Lindu Bariri - Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31172/bgb.v6i1.128

Abstract

Serang City exhibits a high level of seismic vulnerability due to its tectonic position near the convergent boundary between the Indo – Australian and Eurasian plates. Additionally, the local geological conditions, which are dominated by alluvial deposits, make seismic waves more susceptible to amplification and resonance, thereby increasing earthquake hazard potential. The objective of this research is to identify site class characteristics and calculate surface PGA values to assess seismic threat levels in the urban area. The data used include ground acceleration values from microzonation maps, local geological information, and regional seismic parameters. The analysis was conducted by classifying site conditions based on the average shear wave velocity to a depth of 30 meters (Vs30), and by estimating surface PGA values using local amplification factors. The results indicate that most areas of Serang City are classified as SE site class (soft soil), followed by SD site class (medium soil), predominantly in the southwestern part of the city. Surface peak ground acceleration values range from 0.84 to 0.91 g, which are considered very high. These findings suggest that all six districts in Serang City–Serang, Cipocok Jaya, Taktakan, Curug, Kasemen, and Walantaka–are at significant seismic risk in the event of an earthquake. Therefore, appropriate risk mitigation strategies are essential, including the reinforcement of spatial planning systems, the design of earthquake – resistant structures, and the development of more detailed seismic microzonation maps.
Perspektif Masyarakat Sulawesi Tengah terhadap Isu dan Dampak Perubahan Iklim Alfiandy, Solih; Hamid, Syarwan; Ilahi, Asep Firman; Sunardi, Sunardi
Buletin GAW Bariri (BGB) Vol 6 No 1 (2025): BULETIN GAW BARIRI
Publisher : Stasiun Pemantau Atmosfer Global Lore Lindu Bariri - Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31172/bgb.v6i1.152

Abstract

Limited public understanding and perception of climate change indicate that adaptive capacity at the local level remains constrained. This study aims to examine the perceptions, awareness, and engagement of Central Sulawesi communities regarding climate change. A mixed-mode survey—offline and online—was conducted using a questionnaire with 14 structured items and an open-ended essay prompt for additional suggestions. From the sampled respondents drawn from the entire population of Central Sulawesi, the Margin of Error (MoE) was calculated at 7.92%, with a confidence level of 92.08%. The findings reveal that 96% of participants are aware of climate change, although only a small proportion consider themselves well-informed. Furthermore, 75% regard climate change education as highly important, and 96% identify social media as an effective means for disseminating climate knowledge. Moreover, 43% of respondents believe climate change significantly affects their lives, and 45% express concern about its impacts. A majority support mitigation efforts, endorsing reforestation and educational programs as priority strategies. While public awareness appears relatively high, a gap persists between knowledge and tangible action. These insights highlight community readiness—and existing limitations—for supporting local-level climate change interventions.
Co-Authors Abdul Hadid Abdul Syakur AL HS, Usholl Auli Asep Firman Ilahi, Asep Firman Aulia Putri, Isna Jutika Cindiwati, Cindiwati Dewita, Anggi Dimas Permana Donaldi Sukma Permana Hamid, Syarwan Hutauruk, Rheinhart Christian Istofiyah, Istofiyah Nainggolan, Hermanto Asima Nugraha, Muharam Syam Raharjo, Mas Harya Fitra Yudo Rahman, Aditya Setyo Rahman, Adtya Setyo Sunardi Sunardi sutiyono sutiyono Wardaningsih, Kuurnia Widjayanti, Retno Yogi