Was the Pesawaran Swarm Induced by Magmatic Fluids? Insight from Magnetic Method Analysis
- 10.2991/apr.k.220503.025How to use a DOI?
- Inferred Menanga Fault; Magnetic Anomaly; Pesawaran; magmatic fluid
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.
- © 2022 The Authors. Published by Atlantis Press International B.V.
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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 - 10.2991/apr.k.220503.025 ID - Styawan2022 ER -