Summary of the long term data taking, related to one of the proposed next generation ground-based gravitational detector's location is presented here. Results of seismic and infrasound noise, electromagnetic attenuation and cosmic muon radiation measurements are reported in the underground Matra Gravitational and Geophysical Laboratory near Gy\"ongy\"osoroszi, Hungary. The collected seismic data of more than two years is evaluated from the point of view of the Einstein Telescope, a proposed third generation underground gravitational wave observatory. Applying our results for the site selection will significantly improve the signal to nose ratio of the multi-messenger astrophysics era, especially at the low frequency regime.
@article{arxiv.1811.05198,
title = {Long term measurements from the M\'atra Gravitational and Geophysical Laboratory},
author = {P. Ván and G. G. Barnaföldi and T. Bulik and T. Biró and S. Czellár and M. Cieślar and Cs. Czanik and E. Dávid and E. Debreceni and M. Denys and M. Dobróka and E. Fenyvesi and D. Gondek-Rosińska and Z. Gráczer and G. Hamar and G. Huba and B. Kacskovics and Á. Kis and I. Kovács and R. Kovács and I. Lemperger and P. Lévai and S. Lökös and J. Mlynarczyk and J. Molnár and N. Singh and A. Novák and L. Oláh and T. Starecki and M. Suchenek and G. Surányi and S. Szalai and M. C. Tringali and D. Varga and M. Vasúth and B. Vásárhelyi and V. Wesztergom and Z. Wéber and Z. Zimborás and L. Somlai},
journal= {arXiv preprint arXiv:1811.05198},
year = {2019}
}