Satellite image (IMAGE) University of Bonn Caption Left: Satellite image of North Siberia. Two areas of Paleozoic limestone are marked with yellow dashed lines. Upper right: Satellite-measured methane concentration in May, 2020; lower right: in August, 2020. Credit © N. Froitzheim & D. Zastrozhnov, using data of GHGSat (https://pulse.ghgsat.com/) Usage Restrictions Please use this image only in connection with the press release. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.