Analysis of Seismotektonic Patterns in Sumatra Region Based on the Focal Mechanism of Earthquake Period 1976-2016

2nd International Conference on Mathematics, Science, Education and Technology

数学;自然科学;教育

Indah, F.P.^1 ; Syafriani, S.^1 ; Andiyansyah, Z.S.^2

Physics Department, Faculty of Mathematics and Science, Universitas Negeri Padang, Indonesia^1

Badan Meteorologi Klimatologi Dan Geofisika, Pusat GempaBumi Regional VI Padang Panjang, Sumatera Barat, Indonesia^2

关键词: Eurasian plates;    Focal mechanism;    Generic mapping;    Region-based;    Research results;    Reverse faults;    Subduction zones;    Tensor moments;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/335/1/012011/pdf
DOI  :  10.1088/1757-899X/335/1/012011

来源: IOP

【 摘 要 】

Sumatra is in an active subduction zone between the indo-australian plate and the eurasian plate and is located at a fault along the sumatra fault so that sumatra is vulnerable to earthquakes. One of the ways to find out the cause of earthquake can be done by identifying the type of earthquake-causing faults based on earthquake of focal mechanism. The data used to identify the type of fault cause of earthquake is the earth tensor moment data which is sourced from global cmt period 1976-2016. The data used in this research using magnitude m ≥ 6 sr. This research uses gmt software (generic mapping tolls) to describe the form of fault. From the research result, it is found that the characteristics of fault field that formed in every region in sumatera island based on data processing and data of earthquake history of 1976-2016 period that the type of fault in sumatera fault is strike slip, fault type in mentawai fault is reverse fault (rising faults) and dip-slip, while the fault type in the subduction zone is dip-slip.