Edge detectors for offshore fault mapping using gravity data: Example from the Manila Trench forearc region

Malipol, Chae Ann V., Dimalanta, Carla B., Cuevas, Joshua Godwin, Maglalang, Elisha Jane M. and Armada, Leo T. 2025. Edge detectors for offshore fault mapping using gravity data: Example from the Manila Trench forearc region. IOP Conference Series: Earth and Environmental Science 1517 (1) , 012017. 10.1088/1755-1315/1517/1/012017

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Abstract

Multiple edge detectors (ED) are tested and applied to the gravity anomalies from the Manila Trench region. This work evaluated which ED most effectively images deformation features recently delineated in the region. Several EDs applied to the Bouguer anomalies were able to image a major strike-slip fault zone known as the West Luzon Shear Zone. The theta map of the residual Bouguer anomalies displayed sharp linear features, enabling the measurement of offsets from potential offshore splays of the Philippine Zone. Additionally, a stacked maxima heat map was created by combining ED maps, which relied on the maxima to further enhance the detection of the edge of a causative body or a linear feature.

Item Type:	Article
Status:	Published
Schools:	Schools > Earth and Environmental Sciences
Additional Information:	License information from Publisher: LICENSE 1: URL: https://creativecommons.org/licenses/by/4.0/, Type: cc-by
Publisher:	IOP Publishing
ISSN:	1755-1307
Date of First Compliant Deposit:	15 July 2025
Last Modified:	15 Jul 2025 14:30
URI:	https://orca.cardiff.ac.uk/id/eprint/179852

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