A Strong-Motion Network in the Lower Rhine Embayment (SeFoNiB), Germany

Hinzen, Klaus‐G.; Fleischer, Claus

doi:10.1785/gssrl.78.5.502

Cited by 13 publications

(6 citation statements)

References 7 publications

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“…Seismic event timing is controlled by DCF77 clocks. The network reached its current size of 43 stations in 2006 when 20 accelerometer stations were added (Hinzen and Fleischer 2007). Most of these strong-motion stations are in the free field placed on the soft sediments of the LRE, with changing sediment thicknesses from a few decameter to 1.3 km and in close vicinity to the active faults.…”

Section: The Networkmentioning

confidence: 99%

Seismicity in the Northern Rhine Area (1995–2018)

2020

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Since the mid-1990s, the local seismic network of the University of Cologne has produced digital seismograms. The data all underwent a daily routine processing. For this study, we re-processed data of almost a quarter century of seismicity in the Northern Rhine Area (NRA), including the Lower Rhine Embayment (LRE) and the Eifel Mountain region (EMR). This effort included refined discrimination between tectonic earthquakes, mine-induced events, and quarry blasts. While routine processing comprised the determination of local magnitude ML, in the course of this study, source spectra-based estimates for moment magnitude MW for 1332 earthquakes were calculated. The resulting relation between ML and MW agrees well with the theory of an ML ∝ 1.5 MW dependency at magnitudes below 3. By applying Gutenberg-Richter relation, the b-value for ML was less (0.82) than MW (1.03). Fault plane solutions for 66 earthquakes confirm the previously published N118° E direction of maximum horizontal stress in the NRA. Comparison of the seismicity with recently published Global Positioning System–based deformation data of the crust shows that the largest seismic activity during the observation period in the LRE occurred in the region with the highest dilatation rates. The stress directions agree well with the trend of major faults, and declining seismicity from south to north correlates with decreasing strain rates. In the EMR, earthquakes concentrate at the fringes of the area with corresponding the largest uplift.

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Section: The Networkmentioning

confidence: 99%

Seismicity in the Northern Rhine Area (1995–2018)

2020

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“…High density networks have been installed all over the world in high seismic countries (USA, Japan, Taiwan, China, Greece, Turkey) (Gulkan et al 2007;Hutton et al 2006;Kinoshita 1998;Shakal and Scrivner 2000;Skarlatoudis et al 2004;Tsai and Lee 2005;Wu et al 1997Wu et al , 2000Xiaojun et al 2008) as well in low to moderate seismic countries, like Germany or French, that suffered damage and casualties (Hinzen and Fleischer 2007;Pequegnat et al 2008) Modern digital stations in combination with faster computing and sophisticated analysis software have produced new potentialities, with important implications for public safety in earthquakes.…”

Section: Introductionmentioning

confidence: 99%

The Italian strong motion network

Gorini¹,

Nicoletti²,

Marsan³

et al. 2009

Bull Earthquake Eng

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The Italian Strong Motion Network is a permanent monitoring system run by the Italian national emergency management department (Dipartimento della Protezione Civile, DPC). The network is known as RAN (Rete Accelerometrica Nazionale). An extensive project for updating and improving the technology of RAN instruments as well as the number of recording points was performed in the last 10 years. A wide site selection survey was carried out from eastern Sicily along the Italian peninsula, covering high seismic risk areas. The recording station density and the choice of high-quality digital strong motion instruments ensure reliability of the RAN network in the long-term. At the end of 2008, the free field sites selection and instruments installation, planned in the project, were quite completed. In planning and drawing the new RAN, special attention has been devoted to the robustness of the transmission systems, and to the distribution of new stations in order to ensure plenty of data during a seismic emergency. We spent special care both in the estimation of the RAN site responses and in the diffusion of the strong motion data. In order to better identify damaged earthquake areas, improved ground motion parameters need to be set. Such parameters will also assist future progress for engineering seismic design techniques as well as disaster mitigation.

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“…Magnitudes of the teleseismic events are from the GFZ Web report. given by Hinzen and Fleischer (2007). The medium-period 5 s LE3D sensor is located on a pier in the basement of the observatory.…”

Section: Seismic Recordsmentioning

confidence: 99%

“…On 27 July 2011 a rare event occurred when lightning struck a tree on the grounds of the Seismological Observatory Bensberg (BNS), the central station of the local network of Cologne University (Hinzen and Reamer 2007;Hinzen and Fleischer 2007). The tree was located 53 m from a strongmotion station and a medium-period station with an active velocity proportional seismometer.…”

Section: Introductionmentioning

confidence: 99%