Seismicity of the Noto Peninsula: Spatial Patterns, Shallow Zones, and Possible Volcano‑Related Signals

Visualization techniques for seismicity have advanced, but their effective application requires experience and region specific interpretation because earthquake susceptibility varies spatially. We examine the Noto Peninsula, a seismically active region, by analysing earthquake catalogues and mesh based magnitude parameters for events in 2023–2024. Temporal changes in the magnitude locator and scale, together with spatial patterns of shallow seismicity, reveal anomalous behaviour in the offshore area west of Noto—characterised by persistently high locator values and locally reduced scale—that resembles precursory patterns observed in volcanic settings. The 5 May 2023 (M6.5) and 1 January 2024 (M7.6) sequences illustrate how such combined signals may precede large events and how aftershock decay and resurgence complicate post event energy assessment. These findings suggest the possible influence of submarine volcanic or volcano related structures and ongoing orogenic deformation, and they support continued, targeted monitoring of epicentral activity in the region.