microtremor analysis to evaluate bmkg region iii building, bali, indonesia

Bali island has experienced more than 6 significant earthquakes (magnitude > 6) since 1815, which caused extensive damage tobuildings and casualties. the microtremor data analysis in the building of indonesian meteorology, climatology and geophysics agency(bmkg) region iii denpasar aims to reduce the risk of building damage and casualties due to the earthquake. the analysis wasconducted by measuring microtremor and processing the data to obtain the natural frequency of the soil (f0s hvsr) and building (f0bhvsr), resonance, soil (kg), and building vulnerability index (kb) so that the safety of the building can be known in the event of anearthquake. the processing and analyzing results the characteristics of microtremor data get the f0b has a greater value than the f0svalue so that the building is relatively safe from resonance. the resonance value of the building with the ground has an (r) value of6.67% - 13.3%, with an average resonance value of 8.89% which is included in the medium resonance. the location of the building isin an area with a kg of 8.20 – 10.81, which is included in the category of low to moderate soil vulnerability index, and the kb has avalue of 0.4827x10^-6 – 7.9771x10^-6, with the first floor having an index highest vulnerability. the f0s, f0b, r, kg, and kb show that thebuilding is in the safe category in the event of an earthquake.