Landsat 8 images capture a significant algal bloom in the Baltic Sea during August 2015. The glowing green colour indicates the presence of the bloom, while visible black trails represent ship activity. The proliferation of cyanobacteria, fueled by summer heat, presents challenges for the ecosystem, tourism, and aquaculture.

• Image 1: Product: Geo Tiff format, Satellite/Sensor: Landsat 8 OLI, Resolution: 30 metre, Coverage: 180 x 180 km, Acqusition Date: 18 August 2015, Band Combination used to create this image: 4, 3, 2 (RGB) Visible colour layers
• Image 2: Product: Geo Tiff format, Satellite/Sensor: Landsat 8 OLI, Resolution: 30 metre, Coverage: 180 x 180 km, Acqusition Date: 09 August 2015, Band Combination used to create this image: 4, 3, 2 (RGB) Visible colour layers