 The International Soil Moisture Network, ISMN, was established to serve as a centralized data hosting facility for globally available in-situ soil moisture measurements from operational networks and validation campaigns. Data-collecting networks share their soil moisture datasets with the ISMN on a voluntary and no-cost basis, and incoming soil moisture data are automatically transformed into common volumetric soil moisture units and checked for outliers and implausible values. The database contains data of 19 networks and more than 500 stations located in North America, Europe, Asia, and Australia, spanning from 1952 until the present. The ISMN is rapidly expanding and will become an increasingly important resource for validating and improving satellite-derived soil moisture products and studying climate-related trends. Potential networks are invited to enrich the collection by sharing their in-situ soil moisture data. This article was authored by W. A. Derigo, W. Wagner, R. Hohensen, and others. We are article.tv, links in the description below.