Estimation of dynamic characteristics of ground and structures with microtremor measurements- A supportive tool for strong ground motion instrumentation

Nakamura, Yutaka; Gurler, Dilek E.

doi:10.1007/978-94-010-0696-5_21

Cited by 42 publications

(74 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, we cannot obtain such low‐frequency data below about 0.1 Hz due to the low sensitivity of the short‐period sensors. For further improvement of the velocity estimation, the technique of Nakamura (Berg et al., 2018; Lin et al., 2014; Nakamura, 1989) and the joint inversion of ambient noise and receiver functions (e.g., Ball et al., 2014; Bodin et al., 2012) could be feasible. However, such research is beyond the scope of this study.…”

Section: Potential Of Obs Array For Investigating 3‐d Sedimentary Str...mentioning

confidence: 99%

Sedimentary Structure Derived From Multi‐Mode Ambient Noise Tomography With Dense OBS Network at the Japan Trench

et al. 2021

View full text Add to dashboard Cite

show abstract

Section: Potential Of Obs Array For Investigating 3‐d Sedimentary Str...mentioning

confidence: 99%

Sedimentary Structure Derived From Multi‐Mode Ambient Noise Tomography With Dense OBS Network at the Japan Trench

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The most traditional techniques for site effect estimation of the S n term, known as convolutive methods, are based upon computation of the ratio between: (a) the spectrum of the signal (or a portion of it) at the (sedimentary) site of interest; and (b) the spectrum of a reference signal, preferably recorded at a nearby (bedrock) site. Similarly, Nakamura (1989; and Nakamura and Gurler (2001) analyzed site effects by a method based on the computation of the spectral ratio between horizontal (usually the square root of the product between the spectra of the NS and EW components is used) and vertical components (H/V) obtained from seismic noise (microtremors).…”

Section: A Warning About Site Effectsmentioning

confidence: 99%

NDSHA - The New Paradigm for RSHA - An Updated Review

Bela

Panza

2021

TCCKHVTD

View full text Add to dashboard Cite

A New Paradigm (data driven and not like the currently model driven) is needed for Reliable Seismic Hazard Assessment RSHA. Neo-Deterministic Seismic Hazard Assessment (NDSHA) integrates earthquake geology, earthquake science, and particularly earthquake physics to finally achieve a New (and needed) Paradigm for Reliable Seismic Hazard Assessment RSHA.Although observations from many recent destructive earthquakes have all confirmed the validity of NDSHA’s approach and application to earthquake hazard forecasting-nonetheless damaging earthquakes still cannot yet be predicted with a precision requirement consistent with issuing a red alert and evacuation order to protect civil populations. However, intermediate-term (time scale) and middle-range (space scale) predictions of main shocks above a pre-assigned threshold may be properly used for the implementation of low-key preventive safety actions, as recommended by UNESCO in 1997. Furthermore, a proper integration of both seismological and geodetic information has been shown to also reliably contribute to a reduction of the geographic extent of alarms and it therefore defines a New Paradigm for TimeDependent Hazard Scenarios: Intermediate-Term (time scale) and Narrow-Range (space scale) Earthquake Prediction.

show abstract

“…HVSR method is one of the main applications about seismic noise study. It was developed by Nakamura (1989) for the definition of the characteristics of the subsoil through the study of the environmental seismic noise (microtremors). A three‐component broadband velocimeter measures vertical and two horizontal (north–south and east–west) components of ambient seismic noise, which includes microtremors induced by wind, ocean waves and anthropogenic activity.…”

Section: Geophysical Measurementsmentioning

confidence: 99%

Joint interpretation of electrical and seismic data aimed at modelling the foundation soils of the Maredolce monumental complex in Palermo (Italy)

Cafiso

Canzoneri

Capizzi

et al. 2020

Archaeological Prospection

View full text Add to dashboard Cite

The monumental complex of Maredolce (Palermo) includes an Arab‐Norman castle that stands on the banks of an artificial lake carved out of the calcarenitic rock that rests on impermeable clays. The lake was originally filled with water, thanks to the channelling of a spring. Over time, the lowering of the water table and the high hydraulic permeability of the calcarenites have caused the lake to dry up. A project to renovate the monumental complex has recently been launched. It also provides the study of a possible restoration of the original conditions of the lake. To this end, a multidisciplinary geophysical study was carried out to investigate the geotechnical conditions of permeability of the land outcropping and provides valid technical solutions for waterproofing the bottom of the lake. For this purpose, a joint interpretation was performed using data acquired with different geophysical techniques, such as seismic refraction tomography, electrical resistivity and induced polarization tomography, multichannel analysis of surface waves and horizontal‐to‐vertical spectral ratio of environmental vibration recording. Joint interpretation, supported by cluster analysis techniques, allowed the reconstruction of the geophysical and geotechnical model of the subsoil of the ancient lake, helpful to suggest appropriate techniques for waterproofing the bottom of the lake.

show abstract

Estimation of dynamic characteristics of ground and structures with microtremor measurements- A supportive tool for strong ground motion instrumentation

Cited by 42 publications

References 1 publication

Sedimentary Structure Derived From Multi‐Mode Ambient Noise Tomography With Dense OBS Network at the Japan Trench

Sedimentary Structure Derived From Multi‐Mode Ambient Noise Tomography With Dense OBS Network at the Japan Trench

NDSHA - The New Paradigm for RSHA - An Updated Review

Joint interpretation of electrical and seismic data aimed at modelling the foundation soils of the Maredolce monumental complex in Palermo (Italy)

Contact Info

Product

Resources

About