Identification of the Existence of Inferred Menanga Fault based on Gravity Anomaly, Pesawaran, Lampung

DOI

10.2991/apr.k.220503.017How to use a DOI?

Keywords

Menanga Fault; Gravity anomaly; Inferred fault; Pesawaran

Abstract

Inferred Menanga fault is one of fault that is still questionable whether it exists or not. It is located in Pesawaran regency, Lampung, exactly near Ratai Mountain with SE-W orientation and almost crosses the summit of Mount Ratai. The existence is sticking out and needs to be studied since there were swarm’s earthquake that occurred on January 2011. The location of the swarm earthquake is exactly on the inferred Menanga Fault, which may become a sign of the activity of this inferred fault. Here we conducted the gravity measurement to confirm its existence by acquiring a local gravity survey of 49 points, which occupy an area of 12 km², crossing the inferred Menanga Fault and the location of swarm’s epicentre. We calculated the CBA and upward continuation to obtain residual CBA and create our model from residual anomaly. We propose that the trace for the Menanga Fault is located at about 500 m of Southeast from the inferred Menanga Fault. We also propose another fault that separate of about 700 m and parallel to the proposed Menanga Fault.

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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TY  - CONF
AU  - Izaina Nurfitriana
AU  - Purwaditya Nugraha
AU  - Rizki Wulandari
AU  - Erlangga Ibrahim F
AU  - Adhi Wibowo
PY  - 2022
DA  - 2022/05/25
TI  - Identification of the Existence of Inferred Menanga Fault based on Gravity Anomaly, Pesawaran, Lampung
BT  - Proceedings of the Soedirman International Conference on Mathematics and Applied Sciences (SICOMAS 2021)
PB  - Atlantis Press
SP  - 78
EP  - 83
SN  - 2352-541X
UR  - https://doi.org/10.2991/apr.k.220503.017
DO  - 10.2991/apr.k.220503.017
ID  - Nurfitriana2022
ER  -