Relocation of the Hypocenter of an Earthquake with the Double Difference Method in the Regional Study Area of Yogyakarta

Relokasi Hiposenter Gempabumi menggunakan Metode Double Difference Wilayah Kajian Daerah Istimewa Yogyakarta

Authors

  • Fani Rohmiasih UIN Sunan Kalijaga
  • Andi Andi Jurusan Fisika, Fakultas Sains dan Teknologi, UIN Sunan Kalijaga Yogyakarta
  • Nugroho Budi Wibowo Badan Meteorologi Klimatolog dan Geofisika, Yogyakarta

DOI:

https://doi.org/10.20956/geocelebes.v7i2.22223

Keywords:

double difference, fault, hypoDD, residual histogram, subduction

Abstract

The relocation of the earthquake hypocentre is necessary in order to determine the position of the earthquake centre with higher accuracy. An accurate hypocentre position is important for earthquake-prone areas mapping, seismicity analysis, and fault zone identification. The double difference algorithm technique using the hypoDD program can be used for hypocentre relocation. This article reports the earthquake relocation of 23 earthquakes in the Yogyakarta region recorded at four observation stations. The result shows that the hypocentre shift spreads randomly with a shift distance of less than 20 km, with the most shifting direction of the epicentre to the northeast. The Earthquake’s hypocentre after relocation in the land area is estimated to be triggered by a fault under the Gamping Wungkal Formation, while the earthquake around Mount Merapi is estimated to be triggered by volcanic activity. The Relocation result in the sea area show that the hypocentre leads to the subduction line.

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Published

2023-10-10

How to Cite

Rohmiasih, F., Andi, A., & Wibowo, N. B. (2023). Relocation of the Hypocenter of an Earthquake with the Double Difference Method in the Regional Study Area of Yogyakarta: Relokasi Hiposenter Gempabumi menggunakan Metode Double Difference Wilayah Kajian Daerah Istimewa Yogyakarta. JURNAL GEOCELEBES, 7(2), 176–185. https://doi.org/10.20956/geocelebes.v7i2.22223

Issue

Vol. 7 No. 2: October 2023

Section

Articles

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