Fig. 4
Expansion of Home Reef Island during the second eruption phase in September-November 2023 due to a lava flow at the southern edge of the island formed during the first eruption phase (cf. Figure 2). On November 3, 2023, although visible in the SWIR data, the thermal signal already was too weak to be detected by the standard NHI algorithm. PS and S2 data showed plumes of discolored water. Satellite imagery: PlanetScope (Planet Labs 2023), TerraSAR-X/TanDEM-X DLR e.V. (2023), Sentinel-2 Copernicus data (2023). Map created using ESRI ArcGIS Pro 3.3 (https://www.esri.com/en-us/arcgis/products/arcgis-pro)
