Euler Rotation Parameter Estimation in Banda ARC Region
| Main Authors: | Ulinnuha, Hilmiyati, Han, Jen-Yu, Saraswat, Ajay |
|---|---|
| Format: | Proceeding PeerReviewed application/pdf |
| Bahasa: | eng |
| Terbitan: |
, 2022
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/278020/1/SEASC-submit%20-%20Hilmiyati%20-%20Jen%20Yu%20Han%20-%20Full%20Paper.pdf https://repository.ugm.ac.id/278020/ |
Daftar Isi:
- Tectonic plate subduction zones in Indonesia are responsible for major disasters in the country. Banda Arc region, located around the Maluku Islands forms a complex plate subduction zone between the Pacific, Indo-Australian, and Eurasian plates. The risk of disaster is high in this zone. Therefore, tectonic plate monitoring is needed. In this study, Euler rotation parameters are defined to analyze the velocity of tectonic plate movements. Data from 9 Continuously Operating Reference Stations (CORS) around the Banda Arc region are considered to estimate the tectonic movement. GAMIT/GLOBK software is utilized for data processing and then statistical analysis is carried out on changes in coordinates every month. The Euler rotation parameters are obtained through adjustment computation and finally used for the calculation of the model velocity as well as the residual velocity. The t-test results from the first two months show a significant change in the Northing and Up components of the CORS stations. However, from the second to the third month, only Up component changes significantly. Based on the calculation results, the Euler pole position (φ,λ) is (-1.709496055o, 121.8955001o), and angular velocity (ω) is 5.16913x 10-8 mas/yr. While the horizontal velocities in the model are 2.4 to 6.9 cm/yr to the northwest direction. After reducing the value between the model velocity and original velocity, the direction of the horizontal velocities change to the northwest and southwest direction with residual value of 0.6 to 5.7 cm/yr. This shows that the Euler rotation parameter can be used to estimate the residual velocity which indicates the movement velocity due to local tectonic movements.