ESTIMATION OF NEAR-SURFACE ATTENUATION IN BEDROCK FOR ANALYSIS OF INTRAPLATE SEISMIC HAZARD

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CHANDLER A.M.; LAM N.T.K.; TSANG H.H.; SHEIKH M.N.

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Journal: JOURNAL OF SEISMOLOGY AND EARTHQUAKE ENGINEERING Year:2005 | Volume:7 | Issue:3 Page(s): 159-173

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Title

ESTIMATION OF NEAR-SURFACE ATTENUATION IN BEDROCK FOR ANALYSIS OF INTRAPLATE SEISMIC HAZARD

Author(s)

CHANDLER A.M. | LAM N.T.K. | TSANG H.H. | SHEIKH M.N. | Issue Writer Certificate

Keywords

INTRAPLATE SEISMIC HAZARDQ4

UPPER CRUSTQ4

NEAR-SURFACE ATTENUATIONQ4

SEISMOLOGICAL MODELQ4

KAPPAQ4

Abstract

The significance of near-surface attenuation in bedrock, as distinct from attenuation in unconsolidated soft soil sediments, has been identified. The k parameter, which characterizes the extent of this attenuation mechanism, is generally difficult to measure, particularly in regions of low and moderate seismicity. Empirical correlation of k with the near-surface shear wave velocity parameter in rock has been developed using global information obtained from limited independent studies. The influence of shaking intensity on the value of k has been found to be negligible in conditions that are consistent with the average seismicity of Australia (as also for other intraplate regions). Thus, adjustment in the value of k to account for variations in earthquake magnitude, or the intensity of ground shaking, has not been recommended for intraplate conditions. In parallel with the empirical correlations, values of k have also been obtained from calibration analyses employing stochastic simulations of the seismological model, along with one-dimensional non-linear shear wave analyses of the rock layers. Good agreement in the values of k obtained from the different approaches has been demonstrated. The correlation of k with the near-surface shear wave velocity of rock, as recommended in this paper, has thereby been reaffirmed.

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APA: Copy

CHANDLER, A.M., LAM, N.T.K., TSANG, H.H., & SHEIKH, M.N.. (2005). ESTIMATION OF NEAR-SURFACE ATTENUATION IN BEDROCK FOR ANALYSIS OF INTRAPLATE SEISMIC HAZARD. JOURNAL OF SEISMOLOGY AND EARTHQUAKE ENGINEERING, 7(3), 159-173. SID. https://sid.ir/paper/112366/en

Vancouver: Copy

CHANDLER A.M., LAM N.T.K., TSANG H.H., SHEIKH M.N.. ESTIMATION OF NEAR-SURFACE ATTENUATION IN BEDROCK FOR ANALYSIS OF INTRAPLATE SEISMIC HAZARD. JOURNAL OF SEISMOLOGY AND EARTHQUAKE ENGINEERING[Internet]. 2005;7(3):159-173. Available from: https://sid.ir/paper/112366/en

IEEE: Copy

A.M. CHANDLER, N.T.K. LAM, H.H. TSANG, and M.N. SHEIKH, “ESTIMATION OF NEAR-SURFACE ATTENUATION IN BEDROCK FOR ANALYSIS OF INTRAPLATE SEISMIC HAZARD,” JOURNAL OF SEISMOLOGY AND EARTHQUAKE ENGINEERING, vol. 7, no. 3, pp. 159–173, 2005, [Online]. Available: https://sid.ir/paper/112366/en

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