The Institute for Rock Magnetism (IRM) is a national multiuser facility funded by NSF to provide the Earth Science research community with state-of-the-art facilities and technical expertise for magnetic material characterization. Visiting scholars and resident researchers use IRM resources to study contemporary topics in rock magnetism, paleomagnetism, and a broad range of interdisciplinary fields such as biomagnetism, paleoclimatology, and nanomagnetism.  IRM's instrumentation enables measurement of the magnetic properties of materials, including AC and DC magnetic moments and Moessbauer spectra, over a wide range of temperatures (4.2 K - 1000 K) and magnetic fields (10 microtesla - 5 T). In addition, magnetic domain structures may be imaged by various means, including the magneto-optic Kerr effect (MOKE) and magnetic force microscopy (MFM).