Analysis of Earthquake Hazard Potential in Cimahi City and Surrounding Areas Using Microtremor Horizontal to Vertical Spectral Ratio Method
DOI:
https://doi.org/10.56099/jrgi.v7i01.161Keywords:
HVSR, Cimahi City, Hazard Potential, MicrotremorAbstract
Earthquake hazard potential analysis research was conducted in Cimahi city and its surrounding areas using microtremor data from 10 stations. From the research, it was found that the dominant frequency values in research area were in the range of 1.2 Hz - 7.7 Hz. The dominant frequency which was quite high >7Hz was in the western part of Cimahi city, especially in the Leuwigajah and Setiamanah areas, while the low frequency was in the eastern and northern parts of Cimahi city, especially in the Cibabat and Cibereum areas with a frequency value of <2Hz. The amplification factor value obtained was in the range of 3.2 - 11. This value is consistent with the value of the dominant frequency. The low amplification value was in the same area with a range of 0-3, while the moderate amplification factor value was around 4-7 in the Cibabat and Cibereum areas. The lowest Vs30 value was rated at 48.9 m/s in the Cibabat area. While other areas > 48.9 m/s are almost in all areas of the study with the highest value of 130.7 m/s. The resulting Vs30 value can be classified into class E which has a soil profile with soft clay.
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