Does VS30 reflect seismic amplification? Observations from the West Bohemia Seismic Network

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F24%3A00586294" target="_blank" >RIV/67985891:_____/24:00586294 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/24:10487539

Result on the web

<a href="https://doi.org/10.1007/s11069-024-06679-x" target="_blank" >https://doi.org/10.1007/s11069-024-06679-x</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11069-024-06679-x" target="_blank" >10.1007/s11069-024-06679-x</a>

Result language

angličtina

Original language name

Does VS30 reflect seismic amplification? Observations from the West Bohemia Seismic Network

Original language description

The present study addresses verification of average seismic shear-wave velocity from the surface to a depth of 30 m (VS30) as a suitable proxy for a seismic amplification. For this purpose, we used instrumentally homogeneous and spatially dense seismic network WEBNET (West Bohemia Seismic Network), designed to monitor an intraplate earthquake swarm activity in the West Bohemia/Vogtland region (Czech Republic/Germany). Using a Multichannel analysis of surface waves (MASW) shear-wave velocity models and parameters VS30 and H800 (depth of Vs > 800 m/s) were obtained at 17 WEBNET sites. VS30 were compared with (i) H800 and (ii) determined bedrock densities. To understand the relation between VS30 and site amplification, VS30 values were correlated with amplitudes of two earthquakes: (1) Mw 6.4 Petrinja, Croatia (12/2020) and (2) Mw 4.2 SE of Vienna, Austria (03/2021) both recorded by the WEBNET. The correlation analysis examined four categories of seismic waves in nine frequency windows and described the relation between amplification and VS30 using newly defined regression model. The results show that for the regression model, the frequency window with the highest correlation is in the 1–3 Hz range, and this dependence is statistically best observed in the full wave record. The amplification generally decreases with increasing VS30. However, a large scatter in amplification within Eurocode 8 category B is observed. Based on the observations a new general approach is put forward to finely indicate the relation between amplification and VS30 and the use of other site proxies is discussed.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10505 - Geology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Natural Hazards

ISSN

0921-030X

e-ISSN

1573-0840

Volume of the periodical

120

Issue of the periodical within the volume

13

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

22

Pages from-to

12181-12202

UT code for WoS article

001229308300003

EID of the result in the Scopus database

2-s2.0-85193832362