Please use this identifier to cite or link to this item: https://dspace.ctu.edu.vn/jspui/handle/123456789/95573
Title: Establishment of the correlation between the near-surface sedimentary thickness and the microtremor dominant frequency in the Hanoi area
Authors: Nguyen, Tien Hung
Nguyen, Hong Phuong
Nguyen, Le Minh
Che, Min Lin
Tran, An Nguyen
Pham, The Truyen
Nguyen, Van Duong
Keywords: Near-surface sedimentary
Microtremor
Dominant frequency
Correlation
Hanoi
Issue Date: 2023
Series/Report no.: Vietnam Journal of Earth Sciences;Vol.45, No.01 .- P.49-66
Abstract: This paper established the correlation between the near-surface sedimentary thickness (D) and the microtremor dominant frequency (F0) in the Hanoi area based on 64 microtremor measuring points at the boreholes with depth to bedrock. The microtremor dominant frequency was determined using the horizontal-to-vertical (H/V) spectral ratio of the seismic noise technique proposed by Nakamura (1989). The near-surface sedimentary thickness was determined according to the borehole data from the previously published reports. The non-linear regression method was applied to the pairs of D and F0 values from 64 boreholes to obtain the relationship of form D = 81.851*F0-0.942. This correlation function was used to determine the values of the near-surface sedimentary thickness at microtremor measurement points according to the F0 values. Comparison of the D-values obtained in this study with those from the boreholes data shows good coincidence by values and variation tendency, especially in areas with shallow cover thickness from 50 to 100 m. The above results allow the proposal of a new near-surface sedimentary thickness determination technique in the Hanoi area.
URI: https://dspace.ctu.edu.vn/jspui/handle/123456789/95573
ISSN: 0866-7187
Appears in Collections:Vietnam journal of Earth sciences

Files in This Item:
File Description SizeFormat 
_file_
  Restricted Access
7.12 MBAdobe PDF
Your IP: 3.138.134.77


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.