STRAIN ANALYSIS IN JAKARTA METROPOLITAN AREA USING GPS DATA FROM 2019-2023
The active tectonic processes between the Eurasian and Australian Plates result in tectonic complexity in the western part of Java. Jakarta, the capital of Indonesia, is also affected by the Baribis Fault, making it prone to earthquakes. The study aims to calculate and analyze the strain rate usi...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/80498 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The active tectonic processes between the Eurasian and Australian Plates result in
tectonic complexity in the western part of Java. Jakarta, the capital of Indonesia,
is also affected by the Baribis Fault, making it prone to earthquakes. The study aims
to calculate and analyze the strain rate using GPS displacement data at stations
scattered in the Jakarta area. The study consists of six data processing steps, that
includes the calculation of speed at each observation station, the calculation of the
principal strain rate, the calculation of dilatation rate, the calculation of maximum
shear strain, the calculation of moment rate, and the calculation of earthquake
magnitude. The results of the study indicate that the calculation of the speed of GPS
observation stations points to the northwest, except for stations JKT2 and BAKO,
which point to the northeast direction. The principal strain rates range from -183
to 515 nanostrain per year, with the biggest compressive dilatation rate occurring
in southeastern area of Jakarta at -167 nanostrain per year, and the biggest
extensional dilatation rate in area 14 at 544.42 nanostrain per year. The maximum
shear strain ranges from 23 to 251 nanostrain per year. The moment rate value for
the research area is 155.30 N-m per year, with a magnitude of Mw 6.9. |
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