Underground muography measurements by the HUN-REN Wigner Research Centre for Physics

In recent years, there has been continuous development of muographic instruments at the HUN-REN Wigner RCP, including hardware and software. In addition, field testing was performed at several underground sites, looking for new geological understanding. Transferring the particle detector technology from the laboratory to real field conditions presented many surprises and problems to solve, and despite significant progress, there are still newer and newer challenges to overcome. In this article, we summarize recent developments and show examples of results of field measurements carried out in both Hungary and other countries. As of now, muography projects are being carried out in five countries with more than ten detectors, offering promising new insights. This article is based on the presentation given by the corresponding author at the 2024 Muography Workshop held in Santa Fe, NM, USA.