HadISST data: https://www.metoffice.gov.uk/hadobs/hadisst/terms_and_conditions.html

The image 50-natural-earth-1-downsampled.png is downsampled from Natural Earth data whose conditions are stated at https://www.naturalearthdata.com/about/terms-of-use/ (public domain).

The image Miriam.A2012270.2050.2km.jpg is from the Rapid Response section of the NASA LANCE data, which states it is in the public domain https://earthdata.nasa.gov/faq#ed-rapid-response-faq