 The International Soil Moisture Network, ISMN, is a global network of soil moisture measurement sites that provides access to data from multiple sources. It serves as a centralized data hosting facility where in situ soil moisture measurements from operational networks and validation campaigns are collected, harmonized and made available to users. The ISMN also stores important metadata such as soil water measurements from different depths, meteorological variables, precipitation and soil temperature and other relevant information. This data is accessible via a graphical user interface and can be queried according to common standards for data and metadata. The ISMN currently includes data from 19 networks and over 500 stations located in North America, Europe, Asia and Australia. The time period spanned by the entire database ranges from 1952 to the present, but most datasets were acquired within the past decade. The database is rapidly expanding, meaning that both the number of stations and the time period covered by the existing stations are still growing. Thus, the ISMN is becoming an increasingly important resource for validating and improving satellite-derived soil moisture products and studying climate-related trends. This article was authored by W. A. Derigo, W. Wagner, R. Hohensen and others. We are article.tv, links in the description below.