The Turkish National Accelerometric Network: 1973–2010

An analysis of frequency-wavenumber (f-k) spectral power densities of strong ground motion recorded by the Mexico City Accelerometric Network (MCAN) is presented. Time series of a seismic event recorded by the MCAN are analysed. Each recorded motion is assumed to be the insight of a homogeneous random field whose spectral representation reveals an assortment of propagating waves. A kinematic decomposition that separates the waves in longitudinal and transversal displacements was made. These motions are associated to Rayleigh and Love waves, respectively. The analysis on different time windows of the MCAN signals to identify back-propagating waves locally generated as a result of their interactions with shallow geological features was applied. For each component, we estimate the f-k spectral power density, which provide the amplitudes, velocities and directions of propagation of the most significant waves. These values, as functions of frequency, constitute the kinematic spectra of the wave field. Results obtained using this method allow to establish coherent scenarios of the wave field in Mexico City Valley that imply pointing out locally generated surface waves.

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ACCELEROMETRIC NETWORK AND ELASTIC RESPONSE SPECTRUM FOR GROUND TYPE A IN THE REPUBLIC OF SRPSKA

САВРЕМЕНА ТЕОРИЈА И ПРАКСА У ГРАДИТЕЉСТВУ ◽

10.7251/stp2014351c ◽

2020 ◽

Vol 14 (1) ◽

Author(s):

Snježana Cvijić Amulić ◽

Sanja Tucikešić

Keyword(s):

Response Spectrum ◽

Type A ◽

Elastic Response ◽

Eurocode 8 ◽

Hazard Map ◽

Ground Acceleration ◽

Preparation Phase ◽

The Republic ◽

Accelerometric Network

This paper presents the content of an analysis of available relevant accelerometric data, which aimsat identifying a group of nationally determined parameters in the field of seismological activity thatwas used in the preparation phase of the B&H national annex for Eurocode 8. Seismological dataanalysis related to parameters that are in Eurocode 8 open to national choice, refer to the: soilclassification, horizontal elastic response spectrum and reference ground acceleration, respectivelyseismic hazard map.

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A Candidate Proxy to be used in Intensity-Based Triggering Mechanism for Parametric CAT-Bond Insurance: Istanbul Case Study

Earthquake Spectra ◽

10.1193/081018eqs201m ◽

2019 ◽

Vol 35 (2) ◽

pp. 565-588

Author(s):

Mehdi Mousavi ◽

Sinan Akkar ◽

Mustafa Erdik

Keyword(s):

Ground Motion ◽

Risk Model ◽

Building Stock ◽

Ground Acceleration ◽

Risk Levels ◽

Cat Bonds ◽

Bond Insurance ◽

Accelerometric Network ◽

Seismic Networks ◽

Event Based

We study the suitability of average peak ground acceleration ( PGA) as a ground-motion proxy for parametric catastrophe bond (CAT bond) design. We tie the selection of PGA (as a triggering parameter for CAT bonds) to computational convenience (fast retrieval from the recorded ground motion) and loss correlation (optimum monetary return on the investor side). Our case studies advocate that PGA, as a candidate ground-motion proxy, can be used confidently for parametric CAT bonds, particularly applications associated with dense coverage of seismic networks. It is still a compelling ground-motion proxy even if the seismic network coverage is sparse, provided that the accelerometric stations are deployed in the vicinity of assets that financially represent the most significant portion of the insured building stock. We establish an event-based risk model of the Istanbul city (via Monte Carlo simulations) to depict the rationale behind our proposition and compare its performance with other competing (more sophisticated) proxies in terms of accelerometric network density and spatial distribution as well as the different risk levels used in risk management.

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Seismic studies from small aperture accelerometric network in Izmir metropolitan city, Turkey

2012 IV International Conference "Problems of Cybernetics and Informatics" (PCI) ◽

10.1109/icpci.2012.6486345 ◽

2012 ◽

Author(s):

Orhan Polat ◽

Elcin Gok ◽

Ulubey Ceken ◽

Mehmet Kuruoglu

Keyword(s):

Small Aperture ◽

Metropolitan City ◽

Accelerometric Network

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Field Monitoring of Strong Ground Motion in Urban Areas: The Kalochori Accelerometric Network (KAN), Database and Web-GIS Portal

Earthquake Spectra ◽

10.1193/052917eqs098dp ◽

2018 ◽

Vol 34 (2) ◽

pp. 471-501 ◽

Cited By ~ 2

Author(s):

Emmanouil Rovithis ◽

Konstantia Makra ◽

Emmanouil Kirtas ◽

Charalambos Manesis ◽

Dimitrios Bliziotis ◽

...

Keyword(s):

Urban Areas ◽

Free Field ◽

Ground Surface ◽

Urban Environments ◽

Web Gis ◽

Northern Greece ◽

Field Station ◽

Seismic Motion ◽

Local Site ◽

Accelerometric Network

The Kalochori Accelerometric Network (KAN) has been operating since 2014 in the urban area of Kalochori, 7 km west of Thessaloniki in Northern Greece. KAN is composed of seven accelerometric stations: three ground stations installed in distinct urban zones (i.e., residential, industrial, and tanks zone); three stations on top of a selected structure within each urban zone; and one free-field station away from the built environment. The stations are documented with installation and operating features, available characteristics of the housing structures, and geotechnical data. A set of 78 earthquakes that have been recorded by KAN between 16 January 2014 and 31 December 2016 are reported, allowing investigation of local site effects on seismic motion, variation of ground surface motion within different urban environments, and evaluation of dynamic response features of the instrumented structures. KAN stations monographs, processed acceleration recordings, and metadata of the recorded earthquakes are available online through a Web-GIS platform. Indicative example applications are discussed for possible data use in the field of soil and structural dynamics. The DOI linked to the complete set of KAN data is 10.6084/m9.figshare.5044804.

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THE ACCELEROMETRIC NETWORK OF THE INDES-MUSA PROJECT IN THE KALOCHORI AREA: CONFIGURATION, DOCUMENTATION AND PRELIMINARY DATA INTERPRETATION

Bulletin of the Geological Society of Greece ◽

10.12681/bgsg.11816 ◽

2017 ◽

Vol 50 (2) ◽

pp. 1100 ◽

Cited By ~ 1

Author(s):

E. Rovithis ◽

K. Makra ◽

A. Savvaidis ◽

E. Kirtas

Keyword(s):

Free Field ◽

Ground Surface ◽

Data Interpretation ◽

Web Gis ◽

Ground Subsidence ◽

Northern Greece ◽

Building Stock ◽

Ground Acceleration ◽

Preliminary Identification ◽

Accelerometric Network

A network of seven accelerometric stations on both ground surface and structures has been recently installed, as part of a multi-sensor network for monitoring seismic motion and ground subsidence in the broader area of Kalochori, west of Thessaloniki in Northern Greece, within the INDES-MUSA project. This network includes ground installations within the urban area, structural stations on top of structures and a freefield station away from the building stock. The documentation of stations is presented including shear wave velocity profiles of the subsoil at each location. A set of thirtynine earthquakes recorded so far by the accelerometric network is reported, followed by data processing procedures performed in the acquired waveforms. Comparisons of the processed earthquake recordings are presented referring to (a) the urbanground and the free-field stations in terms of peak ground acceleration, indicating amplification trends of ground motion, and (b) the structural and the nearby urban ground stations by means of top-to-base ratios in the frequency domain, towards a preliminary identification of the fundamental vibrational characteristics of the instrumented structures. The processed acceleration data are available through the INDES-MUSA Web-GIS portal.

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Small Local Earthquake Detection Using Low-Cost MEMS Accelerometers: Examples in Northern and Central Italy

The Seismic Record ◽

10.1785/0320210007 ◽

2021 ◽

Vol 1 (1) ◽

pp. 20-26

Author(s):

Valeria Cascone ◽

Jacopo Boaga ◽

Giorgio Cassiani

Keyword(s):

Microelectromechanical Systems ◽

Detection Efficiency ◽

Low Cost ◽

Central Italy ◽

Mems Sensors ◽

Earthquake Detection ◽

Seismicity Monitoring ◽

Mems Technology ◽

Local Earthquake ◽

Accelerometric Network

Abstract This study evaluates the seismicity detection efficiency of a new low-cost triaxial accelerometer prototype based on microelectromechanical systems (MEMS) technology. Networks of MEMS sensors were installed in telecommunication infrastructures to build two small arrays in northern and central Italy. The sensor prototypes recorded major earthquakes as well as nine small seismic events with 2.0<ML<3.0. Where possible, MEMS were compared to the closest high-quality seismic stations belonging to the national accelerometric network. The comparison, in terms of peak ground accelerations and spectral responses, confirms that the signals are in good agreement. The tested inexpensive MEMS sensors were able to detect small local events with epicentral distances as large as 50 km and provided an efficient characterization of the main motion parameters. This confirms that the proposed accelerometer prototypes are promising tools to integrate into traditional networks for local seismicity monitoring.

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