Checkerboard pattern of pressure (IMAGE) University of Hawaii at Manoa Caption A checkerboard pattern of low (blue) and high (red) pressure areas moving eastward through time, generated by just two of the ringing vibrations of the global atmosphere (periods = 32.4 hrs and 9.4 hrs). Credit Sakazaki and Hamilton (2020) Usage Restrictions Image may only be used with appropriate caption and credit. License Licensed 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.