 The International Soil Moisture Network, ISMN, is a centralized data hosting facility that collects and makes available globally available in situ soil moisture measurements from operational networks and validation campaigns. Data collecting networks share their soil moisture data sets with the ISMN on a voluntary and no cost basis. 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 WA Derigo, W Wagner, Aholansen and others. We are article.tv, links in the description below.