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| Lembang Fault |
The Lembang fault is a large fault in West Java that surrounds the northern edge of Bandung, one of Indonesia's largest cities and is just south of the active Tangkuban Parahu volcano. Currently, the activity of the Lembang fault shows clear geomorphic evidence (the shape of the earth's surface) and various genetic studies show evidence that the Lembang fault is still active. The Lembang fault is 29 km long and is an oblique fault with a left-hand strike component and an upward fault component. Based on paleoseismological excavations of soft faults, evidence was found that at least 3 earthquakes occurred in the 15th century, 2300-60 BC and 19,620-19,140 BP. This Lembang fault can produce earthquakes ranging in strength from 6.5 to 7.0 Mw, with a repetition time of 170-670 years.
Geological Background
The Lembang Fault is part of the larger geological system in Indonesia, a country known for its high seismic activity due to its location along the Pacific Ring of Fire. This tectonic region is marked by the convergence of several major plates, including the Indo-Australian, Eurasian, and Pacific plates, leading to intense geological activity.
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| Lembang Fault |
Location and Extent
The fault runs through the vicinity of Lembang, a region situated north of Bandung in West Java. Geologists have identified the Lembang Fault as a strike-slip fault, where two blocks of the Earth's crust slide past each other horizontally. The fault extends for a considerable distance, adding to the complexity of its geological characteristics.
Seismic Activity
The Lembang Fault has been associated with seismic events in the region, and its activity has raised concerns about the potential for future earthquakes. Understanding the fault's behavior is crucial for assessing seismic risks and implementing adequate measures to mitigate potential hazards. Researchers employ a combination of seismological studies, GPS measurements, and geological surveys to monitor the fault's movements.
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| Lembang Fault |
Research and Studies
Scientific investigations into the Lembang Fault are ongoing, with researchers utilizing advanced techniques to unravel its mysteries. This includes studying the fault's historical seismicity, analyzing its geological features, and employing cutting-edge technologies to monitor its current behavior. These studies contribute not only to understanding the Lembang Fault itself but also to advancing the broader field of seismology.
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| Lembang Fault |
Significance for Regional Planning
The presence of an active fault like Lembang has significant implications for regional planning and development. Understanding the seismic risks associated with the fault is crucial for constructing infrastructure resilient to earthquakes and ensuring the safety of local communities.
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