Fig. 2: Results of Independent Component Analysis, and comparison with correlation analysis, on Descending Data (ICA results in both track directions for all periods can be found in Supplementary Figs. S4 and S5).
From: Magmatic connectivity among six Galápagos volcanoes revealed by satellite geodesy
a Results of correlation analysis for each pair of volcano time series, in descending track direction. Grid colour indicates if the correlation is positive (red), or negative (blue), and >∣0.9∣. Source data are provided as a Source Data file. b Spatially reconstructed unmixing values for the corresponding independent component (panel d) for the Fernandina eruptions in 2017, 2018, and the Sierra Negra eruption in 2018, from 11/08/2017 to 17/09/2018. The colour indicates the relative strength of the unmixing value. c Spatially reconstructed unmixing values for the corresponding independent component (panel e), prior to the 2022 eruption of Wolf, from 11/11/2020 to 30/03/2022. d Independent component corresponding to the unmixing values in panel (b). Displacement is normalised on the y-axis. e Independent component corresponding to the unmixing values in panel (c). Note that the independent component does not necessarily mirror the shape of the original time series. For example, the contribution of the independent component shown in panel e results in rate changes at Wolf, Sierra Negra, Fernandina and Cerro Azul (Supplementary Fig. S1).
