PENGGUNAAN DATA GEMPA SEBAGAI INDIKASI BESAR SUDUT PENUNJAMAN LEMPENG TEKTONIK DI SUMATRA UTARA BAGIAN BARAT
| Main Authors: | , VICKY RAY CHANDRA, , Ir. Djoko Wintolo D.E.A. |
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| Format: | Thesis NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2014
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/129636/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=70030 |
Daftar Isi:
- Indonesia has many plate margins, such as convergen plate margin between Indian ocean plate and Eurasian plate that lies in west of Sumatra. Indian ocean plate subduct under eurasian plate was cause of earthquake events in west of Sumatra. Distribution of earthquake events in west of Sumatra influenced by subduction underneath Sumatra Island. Earthquakes are a result of the release of energy that accumulate and confined in the earth's crust to the surface suddenly . in this study, the data are scattered earthquakes in the study area in 1970 to 2012 with a magnitude 5->9 Richter Scale which totaled 1415 points are used to determine and evaluate the angle of subduction of tectonic plates happens. Based on analysis, there are many subduction angles are different in some places. This difference suggests that different pieces of plate subduction with different force direction. Sloping subduction angle has subduction force direction in the east-northeast and quite steep subduction angle has subduction force direction in the northeast. Although movement of the Indian ocean plate move to the north generally, but the direction of the Indian ocean plate subduction towards the northeast and it is different in some places.