Dataset for research article. Autor: Andrej Gosar University of Ljubljana, Faculty of Natural Sciences and Engineering, Ljubljana, 1000, Slovenia Slovenian Environment Agency, Seismology and Geology Office, Ljubljana, 1000, Slovenia e-mail: andrej.gosar@gov.si Title: Study on the applicability of microtremor HVSR method to support seismic microzonation in the town of Idrija (W Slovenia) Journal: Natural Hazards and Earth System Sciences, 17, 1–13, 2017 https://doi.org/10.5194/nhess-17-1-2017 Provided data: 1)List of microtremor measurement points with coordinates (Gauss-Kruger coordinate system), derived HVSR peak frequencies and HVSR peak amplitudes; file: Idrija_HVSR_points_frequency_amplitude.xls 2)Database of microtremor measurements; folder: Idrija_HVSR_database Instrument: Tromino (Micromed, now MoHo s.r.l.; http://moho.world/en/tromino/) Sampling frequency: 128 Hz Record length: 20 min Data format: Tromino Software used for microtremor HVSR analysis: Grilla (Micromed, now MoHo s.r.l.; http://moho.world/en/)