We thank David Lockner,Colin Pennington,the Editor Hongfeng Yang,and the three anonymous reviewers for providing thorough reviews that helped strengthen this work.We also thank Mai-Linh Doan for sharing a simple solution to the relationship between ground velocity and strain,and our colleagues at the U.S.Geological Survey Oklahoma Water Science Center for helping to maintain a high-quality Arbuckle reservoir observatory.Any use of trade,firm,or product names is for descriptive purposes only and does not imply endorsement by the U.S.government. （）