Unraveling the Volcanic Structure of Oceanic Islands—Gravity Survey of Socorro Island, Revillagigedo Archipelago, Mathematician Ridge, Pacific Plate

A gravity survey of Socorro Island, part of the UNESCO-listed Revillagigedo Archipelago, reveals the volcanic structure beneath one of the most active oceanic islands in the Eastern Pacific. The study identifies a subsidence depth of approximately 100 meters within the island's caldera, correlating with an erupted volume of around 2 cubic kilometers and a caldera size of roughly 4.5 by 3.8 kilometers. This finding sheds light on the post-caldera volcanic activity and stratigraphy, including basaltic and pyroclastic sequences that form the shield edifice. The research employs Bouguer anomaly analysis, upward and downward analytical continuations, vertical derivatives, and 2.5-D forward modeling to constrain subsurface structures and density contrasts, providing a detailed understanding of Socorro Island's volcanic evolution.

Pavón‑Moreno, J. A., Urrutia‑Fucugauchi, J., Pérez‑Cruz, L., & Escorza‑Reyes, M. (2026). Unraveling the Volcanic Structure of Oceanic Islands—Gravity Survey of Socorro Island, Revillagigedo Archipelago, Mathematician Ridge, Pacific Plate. Earth and Planetary Science, 5(1), 1–19. https://doi.org/10.36956/eps.v5i1.2924