What is the tectonic setting of sulawesi?5 answersSulawesi is located at the intersection of three converging plates: the Indo-Australian, Eurasian, and West Pacific plates. The region is characterized by a complex tectonic setting involving collisions and rotations of continental blocks, island arcs, and oceanic domains. The eastern part of Sulawesi consists of two terranes: an ophiolite complex and its pelagic sediment cover, and continental terranes covered by Sulawesi molasse. The central part of the island is governed by the Palu-Koro/Matano left-lateral strike-slip fault system, while the western region is affected by the Palu-Koro fault, and the eastern region by the Matano, Lawanopo, and Mendoke faults. The region has experienced deep subduction, collision, and exhumation of oceanic and continental materials, as well as extensional and compressional deformation.
How condition recently about building code in Indonesia after earthquake?5 answersThe recent condition of building codes in Indonesia after earthquakes has seen significant developments. Efforts have been made to update seismic hazard maps, revise and continuously update building and infrastructure design codes, develop microzonation maps for big cities, and establish a national center for earthquake studies. The Indonesian Spectra Design 2021 has replaced the previous design, and the Indonesian Earthquake Resistant Building Code SNI 03-1726-X has undergone major changes, including the use of Risk-Targeted Maximum Considered Earthquake (MCER) Spectral Response Acceleration maps. The development of SNI 1726-2019 and Indonesian Spectra Design 2021 has raised concerns about the behavior of existing buildings designed according to previous regulations. The changes in the building codes have led to a change in the level of safety in structures, highlighting the need for studies and assessments before implementing the new regulations.
How much plastic waste in east java?4 answersEast Java generates a significant amount of plastic waste. According to the study conducted by Oktrianto and Siswanto, the hazardous waste produced by industries in East Java in 2016 was approximately 549,750 tons, with only about 58% of it being treated. Another study by Prasetya et al. found that the daily garbage in Malang City, which is located in East Java, reaches 661.12 tons per day, with 29.5% of it being inorganic waste. However, the specific amount of plastic waste in East Java is not mentioned in the abstracts provided.
What is the fault of an earthquake?3 answersAn earthquake fault refers to the location where a rupture occurs along a fault plane, resulting in seismic activity. The fault plane is a surface within the Earth's crust where rocks on either side have moved relative to each other. Earthquake faults can have various characteristics, including being heterogeneous with smooth and coherent ruptures extending over a rectangular fault plane, as well as non-uniform and incoherent ruptures propagating over localized small areas on the fault. Faults can be represented mathematically by displacement discontinuity vectors across the fault plane, with the orientation of these vectors specified by fault strike, dip angle, and slip angle. Fault zones consist of structures spanning a wide spectrum of lengths, ranging from fine grains forming a gauge or ultracataclasite zone to discrete fault segments and branched fault segments. Understanding the formation and evolution of these fault structures is crucial for comprehending earthquake activity and its impact on fault zones. Active faults, which have the potential to be reactivated in the future, are of particular interest for assessing earthquake disasters and prevention.
Could you please give me the references of pacitan geology in east java?5 answersThe geology of Pacitan in East Java has been studied in several papers. The area is characterized by steep-slope areas prone to landslides. The Tukul dam in Pacitan is located in a medium to high ground potential movement zone, and slope stability analysis is necessary to avoid soil movement that could harm the dam construction. The Pringkuku karst area in Pacitan consists of structural and non-structural reef limestone and clastic limestone units, which have undergone diagenesis and contain minerals such as calcite, dolomite, and quartz. The Arjosari geothermal area in Pacitan shows potential for geothermal energy due to the presence of hot springs, alteration rock, and various volcanic and igneous rocks. The Grindulu Fault in Pacitan is a geological structure that has the potential to cause earthquakes, and its depth and segmentation have been analyzed using gravity data.
What is the cause of earthquakes?5 answersEarthquakes are caused by various factors. The Omega-Theory suggests that earthquakes are not directly caused by external forces related to tectonic stresses, but rather by rotational singularities in the Earth's crust. Geological forces on the rock and adjoining plate can also lead to earthquakes. Sudden slip along a tectonic fault releases stored strain energy, resulting in earthquakes. Additionally, volcanic activity and manmade reservoirs can create earthquakes. The causes of earthquakes have been studied since ancient times, with theories ranging from underground exhalations to spontaneous explosions of flammable material. Solar energy has also been found to influence the occurrence of earthquakes. Overall, earthquakes are complex phenomena influenced by a combination of factors including tectonic forces, geological activity, and solar energy.