bluuebunny/crossref_metadata_2025_split huggingface dataset:
Preliminary Results of Double Difference Tomography at Sunda-Banda Arc
Authors: Haolia  , Sulaiman M. I. , Brilianti P. T. , Nugroho R. P. , Madrinovella I. , Abdullah A. , Zaky D. A. , Suhardja S. K. , Priyono A. , Widiyantoro S. , Ramdhan M. , Nugraha A. M. S. 
Published: November 2021

Abstract
The Sunda-Arc transition to the Banda Arc is located on the south of the Flores Island, Indonesia, where the Australian lithosphere is moving to the north direction. On-going subduction process dictates the tectonic setting though some studies also suggest a collision and obduction may occur in the past due to of plate buoyancy. This area has active seismicity with frequent large magnitude events. To better understand the tectonic system in this region, we performed double-difference tomography inversion using regional events. We obtained the data catalog from the Indonesian Agency of Meteorology, Climatology, and Geophysics ranging from 116° to 125° east longitude and -6.5° to 12.5° latitude. We collected 4312 events data, detected from 15 stations from January 2015 to December 2019. Final relocated hypocenters showed a reduced fixed-depth problem and a more clustered event, although some deep events disappear. Most events are related to the subducting Benioff zone with some clustered events in the northern area may be related to back-arc thrust. We also observed clustered events near active volcano region and reduced shallow seismicity region to the west of the Timor Island. Resolution test using the checkerboard and Derivative weigh Sum (DWS) shows that fair P wave resolution can be achieved until 300 km, although a smearing start to show at a deeper depth. However, due to lack of arrival S wave data, the resolution test suggest good resolution can only be seen until a depth of 100 km. Tomogram P and S wave models show a clear dipping subducting slab from south to North down to a 250 km. We also spot a fast velocity band near the Timor Island area that similar to the previous tomography study, interpreted as sliver forearm. We spotted a band of lower Vp, lower Vs and higher Vp/Vs at shallow depth close to the volcanic line and we interpreted this as a zone of higher temperature, that may relate to magmatic activity in this region. We also noticed a zone of low velocity and higher Vp/Vs that may relate with dehydration and partial melting. However, we feel this still uncertain due to low Vs resolution.
Early Result for Microtremor Characteristic Observation in Merapi and Merbabu
Authors: Fernanda E. , Bilqis A. , Julio L. , Nursal K. , Christ Y. H. , Adiansyah T. , Suhardja S. K , Ramdhan M. 
Published: November 2021

Abstract
The arc magmatism and volcanic activity in Java are dominated by the subducting plate of Indo-Australian into the Eurasian plate. Merapi volcano is located in Central Java and known as one of the most active volcanoes in the world. Several studies have tried to estimate the magma reservoir zone in Mt. Merapi and suggested multiple layers of reservoirs with the shallow one at 1-2 km and a deeper at 6 -9 km or 15 km. The Low-Frequency Passive Seismic is one method to analyze the frequency spectrum below the recording station. Previous related studies show a promising a relation between hydrocarbon reservoir and higher amplitude at vertical component at a frequency between 0.1 – 6 Hz. An observation at the volcano sites have also been reported to display a different spectrum amplitude at the vertical component. This study exploited the same method in LFPS to analyze the frequency spectrum at Mt. Merapi and Mt. Merbabu. We use seismic data from the DOMERAPI temporary seismic network installed in the neighborhood of Merapi and Merbabu volcano. We analyze 53 broad-band seismometers data from October 2013 to mid-April 2015. We also add several stations from MERAMEX network instruments to compare spectrum analysis outside the Merapi and Merbabu volcano. We also removed some tele-seismic and regional events from the data to better analyze the LFPS signal. We have seen a higher amplitude in vertical component near Mt. Merapi and will proceed to analyze all stations.
Land Subsidence of Java North Coast Observed by SAR Interferometry
Authors: Sidiq T P , Gumilar I , Meilano I , Abidin H Z , Andreas H , Permana A 
Published: November 2021

Abstract
Land Subsidence became recent issue in environmental management in Indonesia. Large cities in Indonesia, especially in Java Island, are well known to suffer from fast rate land subsidence such as Jakarta, Bandung, and Semarang. However, the phenomena is presumed to also happen in other cities which have large industries and located on the deposit or clay soil layer. The effect of land subsidence may be different in some location, but the coastal zone will have more impact since land subsidence will also induce tidal flood and may cause land area reduction. In this study, we use more than 70 Sentinel-1 data, range from year 2016 to 2020 to map the land subsidence in the Java North Coast. The interferograms are selected based on Small Baseline Subset (SBAS) algorithm. National Digital Elevation Model (DEMNAS) is used in differential InSAR process. Our result shows that many cities along the Java North Coast suffer land subsidence. Jakarta, experience has maximum subsidence more than 5 cm/year. In Central Java, Pekalongan experience up to 7 cm/year of land subsidence, while Semarang and Demak has subsidence rate up to 8 cm/year.
Laboratory-scaled Azimuthal Resistivity Survey for Fracture Detection
Authors: Salam R , Parnadi W W 
Published: November 2021

Abstract
We conducted azimuthal resistivity survey (ARS) at laboratory scale to study apparent resistivity patterns due to fracture existing in subsurface through physical modeling using test objects buried in a sandbox as well as in a test location outside laboratory building. This survey was divided into 2 experiments, i.e. experiment A and experiment B. In experiment A the survey is implemented on 2.50 m x 1.5 m x 0.81 m sandbox, made of 10mm thick glass plates. Sandstone was used as medium representing quasi homogenous medium. Clay roof tiles as well as steel plates as test objects were buried in the sandbox with three different deep angles: 90°, 45° and 0°. In experiment B this survey was conducted outside laboratory building on the grass field and implemented on 2.50 m x 2.5 m x 1.0 m soil body. Vertical single glass plate as well as vertical double glass plates at 30 cm distance were buried in the soil body. Azimuthal resistivity measurements at 15° angular step using Wenner and dipole-dipole configuration were carried out in both experiments located at 1 point just above anomalous object for experiment A and at 3 points at 15 cm distance from anomalous object for experiment B. As a compliment to ARS we acquired profiling data from two lines parallel and perpendicular to horizontal axis of anomalous object. Our results show that the apparent resistivity pattern can show the direction of anomalous object for both configurations and experiments with a little deviation.
Implementation of Landslide Susceptibility Model Using Machine Learning for Semi Detailed Map Scale in Mountainous Region of Java Island
Authors: Sadisun Imam A. , Kartiko Rendy D. , Dinata Indra A. 
Published: November 2021

Abstract
Landslide susceptibility modeling using neural network (ANN) are applied to semi detailed volcanic-sedimentary water catchment. Annually landslide occurred in catchment area frequently in unconsolidated and weathered material combined with uncertainty in rainfall pattern that complicated landslide occurrence. Data used for analysis including landslide inventory, geology, digital elevation related data, distance to stream, and several other available data. Results show that machine learning method yield fair result data based on evaluation on Area under Curve (AUC). Thus, it can be suggested that machine learning methods for landslide susceptibility model could still be develop to produce robust prediction model with different characterization of parameter data and machine learning parameters.
Crustal deformation of Eastern Indonesia regions derived from 2010-2018 GNSS Data
Authors: Rahmadani Suchi , Meilano Irwan , Sarsito Dina A. , Susilo  
Published: November 2021

AbstractEastern Indonesia lies in a complex tectonic region due to the interaction of four major tectonic plates: the Australian Plate, Pacific Plate, Philippine Sea Plate, and Sunda Block. Therefore, this region hosted some destructive seismic activities as well as tectonic deformation, such as the Mw 7.5 Palu Earthquake, the sequences of the 2018 Lombok Earthquake, and the Mw 6.5 Ambon Earthquake in 2019. Our work proposes a recent study on crustal deformation in Eastern Indonesia inferred from Global Positioning System (GPS) velocity field. We used GPS data from the observations of 49 permanent and 61 campaign stations from 2010 to 2018. Here, our velocity field result represents long-term tectonic deformation regions in Eastern Indonesia continuously, from Bali in the west to Papua in the east, demonstrated both in the ITRF 2008 and the Sunda reference frames. The spatial pattern of velocity field map collected from this research will give an initial insight into the present-day tectonic condition in Eastern Indonesia and then can be used to improve our ability to assess this area’s earthquake potential.
Application of P-Wave Moment Magnitude (Mwp) and Rupture Time Duration (Tdur) to Analyze A Potential Tsunami Earthquake in Sumatra
Authors: Simanjuntak Andrean V H , Sihotang Noviana , Simangunsong Afryanti V , Simamora Buha M M , Kuncoro Djati C , Asnawi Yusran , Umar Muksin , Irwandi I. 
Published: November 2021

Abstract
Tsunami warning is one of many important reports to save lives and reduce the damage for local peoples. A moment magnitude of P-wave (Mwp) and the rupture time duration (Tdur) can be used as the quickly parameters to diseminate the tsunami warning. In this paper, we analyze the seismic waveform from global network to get Mwp and Tdur of South-West Coast of Sumatera earthquake. Mwp was calculated using automatic and manual phase picking of P phase. The results of this study show a well-analyzed relationship between P wave from automatic and manual picking, Mwp and time duration, respectively. The result also give an encouraging studies for the early warning system that will be set up in the future in the region.
Synthetic Modeling of Ambient Seismic Noise Tomography Data
Authors: Syaifuddin Firman , Nugraha Andri Dian , Zulfakriza  , Rosalia Shindy 
Published: November 2021

Abstract
Ambient seismic noise tomography is one of the most widely used methods in seismological studies today, especially after a comprehensive Earth noise model was published and noise analysis was performed on the IRIS Global Seismographic Network. Furthermore, the Power Spectral Density technique was introduced to identify background seismic noise in the United States. Many studies have been carried out using the ambient seismic noise tomography method which can be broadly grouped into several groups based on the objectives and research targets, such as to determine the structure of the earth’s crust and the upper mantle, to know the thickness of the sedimentary basins, to know the tectonic settings and geological structures, to know volcanic systems and geothermal systems, knowing near-surface geological features and as a monitoring effort the Ambient Noise Tomography method carried out by repeated measurements or time lapse. In this study, we investigate the characteristics of the ambient noise seismic tomography method, both its advantages and limitations of the method by utilizing synthetic data modeling using a simple geological model. Synthetic data is generated based on 1D dispersion curve forward modelling and the forward modeling of surface waves travel time for each period, which is then convoluted with the wavelets of each periods, then doing reverse correlation using a reference signal to produce synthetic recording data. We found that the estimate target depth and vertical resolution depend on the recorded data periods and the synthetic data modeling can be used as a basis in determining the acquisition design.
GIS-based land suitability analysis for potential urban development sites in Diffun, Quirino, Philippines
Authors: Sia E E A , Navarra N , Villa Juan J D 
Published: November 2021

Abstract
As the world moves towards urbanization, the demand for land for urban land use increases. If left unmanaged, this might result in the wastage of land that could have been used for more productive purposes, such as agriculture. Other developments can also pose risks to the environment and to those who inhabit it. Therefore, land suitability analyses must be carried out before proceeding to urban planning. This study produced an urban suitability analysis of the municipality of Diffun in Quirino Province as a basis for future urban planning. Conducting this analysis will be very timely, considering that the revision of the municipality’s Comprehensive Land Use Plan (CLUP) will start in 2021. In this study, two methods of doing the analysis were integrated: Boolean overlay and weighted overlay. Using the gathered spatial data, a total of 18 factors and restrictions were produced for the analysis. Restriction layers used in the Boolean overlay method include existing built-up areas, erosion risk, flooding susceptibility, protected agricultural lands, other protected lands, Quirino Protected Landscape (QPL), slope, waterway buffers, and ecotourism site buffers. Meanwhile, the weighted overlay analysis used the following factors: elevation, land-use type, distance to ecotourism sites, distance to local roads, distance to national and provincial roads, proximity to the downtown, distance to protected agricultural lands, distance to waterways, and slope. The weights of the factors were calculated using a pairwise matrix. The study concluded that only 0.32% of the total land area of the municipality is most suitable for urban land-use, while 87.36% is considered not suitable for the development of built-up areas.
Distance analysis of U-turn round facilities for sustainable urban development (case study of Ahmad Yani Road, Tirtayasa and Cilegon road)
Authors: Hidayat B , Saputri F A A 
Published: November 2021

Abstract
Cilegon City is an industrial city with internal and internal movements occurring on one access road stretching from Jalan Raya Cilegon, Jalan Ahmad Yani, and Jalan Sultan Ageng Tirtayasa. This arterial road section has a total road length of 5 km that passes through the Cilegon City area, which is the center of activity. Efficient use of traffic space by arranging the traffic space efficiency is used the distance between U-turns so that delays and queues are low. As long this road network has the highest volume of 2,399 pcu/h with an average speed of 32 km/h and reaching a VCR of 0.8 has a median number of 13-point openings, the number of uncontrolled U-turns causes many conflicts traffic that will cause traffic disruption when a vehicle makes a U-turn. The purpose of this study is to improve the performance of the road network in the Area of the City of Cilegon by knowing the best distance between U-Turns. Simulation analysis uses Vissim software to produce the ideal distance for each opening in the Cilegon City arterial road, which is then utilized in the arrange of the U-turn facility itself. The method used is the calculates of existing traffic performance and simulation to determine the ideal distance between U-Turn facilities. The simulation results with the ideal Vissim model of the distance between the turning facilities were 650 meters with an average delay of 17.56 seconds, a network speed of 33.07 km/h, a total distance of 28,453.34 km, and the total travel time to be 847.30 hours.
Ligtas Agtas: a sustainable and disaster-ready resettlement area for the Agta Community in Sitio Pulang Lupa
Authors: Ang S R , Palarca H T 
Published: November 2021

Abstract
Most indigenous peoples experience homelessness in the Philippines. This is the case for Mount Kalbo’s indigenous tribe, the Agta Community. They face the challenges of dealing with mass wasting disasters potentially devastating their houses and compromising the lives of their families. It is with high hopes that they will be resettled to Sitio Pulang Lupa to rebuild a community, in which this research aims to propose and develop. The proposed resettlement’s goal is to improve and sustain the Agtas’ living conditions in Sitio Pulang Lupa by addressing the unstable slopes and preparing the community to cope with mass wasting disasters. Sitio Pulang Lupa is analyzed compared to Mount Kalbo regarding its advantages of keeping the resettlement sustainable and safe from mass wasting. The resettlement merges the Agtas’ necessities to achieve the research’s objectives, which are improved living conditions, cultural representation, and disaster preparedness into one landscape development in Sitio Pulang Lupa. The resettlement comprises of spaces and facilities that reflect their cultural practices and their needs. Disaster management protocols were also formulated by mapping safe routes, and refuge landscapes to equip the Agtas with preparedness in case disaster occurs. To sustain the vision for the Agtas, soil conditions are firstly addressed by using contour planting. It was used as slope protection and to over-all enhance the environmental quality of the Agtas’ resettlement area. The resettlement as a whole shall be able to meet the research’s goal of proposing a landscape development that mitigates the mass wasting threats experienced by the Agtas, and improves their living conditions. Having said that, Agtas shall finally feel safe and secured in their own homes.
Attaining food self-sufficiency through the Edible Landscaping (EL) Technology: Assessing the Promotional Activities of EL in the Philippines, amidst the COVID-19 Pandemic
Authors: Sanchez F C , Ilang-Ilang Jr.M C , Balladares M C E , Apacionado B V , Tayobong R R P , Medina N G , Torres R O 
Published: November 2021

Abstract
The sustainability of the food supply seems to be a never-ending concern of many households in the Philippines. This concern is most especially felt in this time of pandemic wherein many Filipinos are struggling on where to get their food to feed their families. The adoption of edible landscaping has become more in demand because of the current situation caused by the pandemic. As such, having a sustainable edible garden is very much recommended because it can provide the household a “garden to table” food which can help in making the household food self-sufficient. There is a current need to promote edible landscaping technology primarily through trainings and seminars and it should be intensified to inform and educate the people on food self-sufficiency amidst the COVID-19 pandemic. Edible landscaping (EL) as an approach that merges the science of crop production and the art of landscaping, is continuously being promoted using different strategies and one of which is the conduct of trainings and seminars all over the Philippines. This study assessed the different ways by which the Edible Landscaping Team of the University of the Philippines Los Banos delivered promotional activities such as webinars and e-training amidst the context of the COVID-19 pandemic. This research was conducted using the qualitative approach, specific case studies, and the data gathered were analyzed using thematic analysis. More than 39,000 individuals in the Philippines have already been reached and educated on the technology through the conduct of e-trainings and webinars. The presentations and lectures on edible landscaping were modified based on the needs of the requesting institution and were discussed using a combination of English and Filipino languages. The duration of the eight webinars ranged from a minimum of 30 minutes to a maximum of almost 5 hours (in discussion is written ‘almost 4 hours). Based on the comments, most of the online viewers gave affirmative responses.
Planning for alternative road development connecting East Balikpapan - North Balikpapan
Authors: Setiabudi I , Hermawan I M A 
Published: November 2021

Abstract
Balikpapan City is one of the largest cities in the East Kalimantan region and a city that is developing quite rapidly. These developments include a high population number accompanied by a large number of new activity growths which create a considerable traffic pull around the city center. According to the 2012-2032 City Spatial Plan for Balikpapan City, the priority plan for road development is on Outer Ring Road III and other alternative roads which will become new activity centers in Karang Joang and Manggar sub-districts in Balikpapan City. The road network currently has the highest volume of 4288 pcu / hour with an average speed of 42 km / h and reaches a VCR of 0.8 which has 35 existing roads and 17 intersections. This study intends to improve traffic performance and aims to plan an alternative road network connecting East Balikpapan with North Balikpapan. Simulation analysis uses Visum software to produce the best conditions for handling traffic in Balikpapan City arteries, collectors and local roads where the current condition of the traveler has to go through the East, South, Central and North Balikpapan District network. The method used is the calculation of existing traffic performance and simulation to determine network volume, network speed, total distance and total travel time. The simulation results with the Visum model are the best conditions of traffic performance with an average volume of 762 pcu / hour, an average network speed of 42 km / hour, a total distance of 148487 km, and a total travel time of 3369 hours.
Application of Biophilia Concept on Greenery Layout Arrangement of Buperta Cibubur Tourism Landscape
Authors: Alya S Z , Khrisrachmansyah R 
Published: November 2021

Abstract
The concept of Biophilia shows how humans have a fundamental desire to connect and depend on nature, providing healing and positive impacts on emotional change. DKI Jakarta Province population number has increased significantly from year to year so that the need for green open space increases. Buperta City Forest Area has enormous potential to facilitate the needs of the green space in the City of East Jakarta, but the development of existing natural tourism is still not optimal. The concept of Biophilia can be a solution to increase the attraction, user experience, and increase relaxation benefits for Buperta Cibubur user in sustainable way. The objectives of this research are: (1) Identifying and studying the characteristics of the site and its users, (2) Developing criteria for the utilization of the Biophilia concept in green open spaces, and (3) Developing greenery layout arrangement recommendations. Furthermore, direct observation, interview, and literature study were used comprehensively to collect the data. Data processed using Biophilia approach, through descriptive analysis and spatial method of analyzing the potential and constraints from the site. Detail reccomendation developed on zones with strongest natural potential such as “Kempa”, Recreation Area, and Pine Forest, with each different approach of using Biophilia concept according to the environment and user characteristics. The output of the research is in the form of planting plan and site plan.