Jurnal Teori dan Aplikasi Fisika
Vol. 12 No. 02 (2024): Jurnal Teori dan Aplikasi Fisika

Identifikasi Sebaran dan Jenis Sesar Lokal di Sekitar Sesar Waipoga Dengan Analisis Anomali Gravitasi

Hafidz Syarifuddin (Sekolah Tinggi Meteorologi Klimatologi dan Geofisika)
Mahmud Yusuf (Sekolah Tinggi Meteorologi Klimatologi dan Geofisika)



Article Info

Publish Date
28 Jul 2024

Abstract

Nabire Regency is located on the bird's neck of the island of Papua with a history of high seismicity. The Waipoga fault as a major fault was recorded to have caused the Nabire earthquake on November 26, 2004 with a magnitude of 7.2 Mw. Around the Waipoga fault there are small faults that are suspected to be faults. This research aims to identify the presence of suspected faults around the Waipoga Fault using the gravity method. The gravity data uses GGMPlus global satellite data in combination with topographic data from DEMNAS. The research uses surfer software to display the distribution of simple bouger anomalies, residual regional anomalies, and derivative analysis. The anomaly value obtained shows that the Nabire Regency area is predominantly composed of hard rock with a density of 2.7187 grams / cm3. The high density of subsurface constituent rocks results in a dominant positive simple bouger anomaly (SBA) value, with a value range between -10 mGal to 95 mGal. From the results of the FHD (Firts Horizontal Derivative) and SVD (Second Vertical Derivative) analysis, it shows a clear density contact boundary so that the fault line can be drawn in two segments. Fault segment A has a northeast-southwest (NE-SW) orientation with a rising fault mechanism. Segment B shows a descending fault that has a meandering shape towards the northwest-southeast (NW-SE).   Keywords: Gravity anomaly, FHD, SVD, Waipoga Fault

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Journal Info

Abbrev

jtaf

Publisher

Subject

Astronomy Electrical & Electronics Engineering Materials Science & Nanotechnology Physics

Description

We invite authors to submit manuscripts of up to 10 pages, prepared in accordance with the author guidelines. The scope of this journal includes, but is not limited to, the following fields: 1. Theoretical Physics Classical Mechanics Electromagnetics Thermodynamics Statistical Mechanics Quantum ...