Proceedings of the Soedirman International Conference on Mathematics and Applied Sciences (SICOMAS 2021)

Was the Pesawaran Swarm Induced by Magmatic Fluids? Insight from Magnetic Method Analysis

Authors
Yudha Styawan1, Izaina Nurfitriana1, *, Rizky Wulandari1
1Program Studi Teknik Geofisika, Jurusan Teknologi Produksi dan Industri, Institut Teknologi Sumatera, Lampung Selatan, 35365, Indonesia
*Corresponding author. Email: izaina.nurfitriana@tg.itera.ac.id
Corresponding Author
Izaina Nurfitriana
Available Online 25 May 2022.
DOI
https://doi.org/10.2991/apr.k.220503.025How to use a DOI?
Keywords
Inferred Menanga Fault; Magnetic Anomaly; Pesawaran; magmatic fluid
Abstract

An earthquake swarm in January 2021 triggered research related to adjacent geological structures, mainly inferred Menanga fault having predicted in the previous studies. This study is focused on investigating the fault and volcanic -related activity in terms of magnetic field anomalies due to sensitivity of susceptibility. By measuring 55 points with 500 m intervals, the observed magnetic values are processed to Reduction to Pole (RTP) anomalies and interpreted by adopting the successive decomposition method. This method generates pseudo-depth structures using the subtraction between below and above residual anomalies for each slice. The result indicates that variation of variated rocks is detected by a short-wavelength magnetic anomaly in slice 1, whereas an NW-SE high anomaly at the southern part research area indicates volcanic activity, which may related to magmatic fluid injection. This magmatic fluid injection reactivated the inferred Menanga fault causing the earthquake swarms. The dimming upward of the high anomaly explains the magmatic injection have not been involved toward the surface and remain isolated at depth.

Copyright
© 2022 The Authors. Published by Atlantis Press International B.V.
Open Access
This is an open access article distributed under the CC BY-NC 4.0 license.

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Volume Title
Proceedings of the Soedirman International Conference on Mathematics and Applied Sciences (SICOMAS 2021)
Series
Advances in Physics Research
Publication Date
25 May 2022
ISBN
978-94-6239-579-4
ISSN
2352-541X
DOI
https://doi.org/10.2991/apr.k.220503.025How to use a DOI?
Copyright
© 2022 The Authors. Published by Atlantis Press International B.V.
Open Access
This is an open access article distributed under the CC BY-NC 4.0 license.

Cite this article

TY  - CONF
AU  - Yudha Styawan
AU  - Izaina Nurfitriana
AU  - Rizky Wulandari
PY  - 2022
DA  - 2022/05/25
TI  - Was the Pesawaran Swarm Induced by Magmatic Fluids? Insight from Magnetic Method Analysis
BT  - Proceedings of the Soedirman International Conference on Mathematics and Applied Sciences (SICOMAS 2021)
PB  - Atlantis Press
SP  - 133
EP  - 137
SN  - 2352-541X
UR  - https://doi.org/10.2991/apr.k.220503.025
DO  - https://doi.org/10.2991/apr.k.220503.025
ID  - Styawan2022
ER  -