Introducing the European Rapid Raw Strong‐Motion Database

Cauzzi, Carlo; Sleeman, Reinoud; Clinton, John; Ballesta, Jordi; Galanis, Odysseus; Kästli, Philipp

doi:10.1785/0220150271

Cited by 19 publications

(18 citation statements)

References 37 publications

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“…A processing pipeline is applied to segments stored in the local data base passing a first quality check (QC1) that consists in selecting segments without gaps or overlap and a percentage of missing data smaller than 50 per cent of the total requested amount. Segments with maximum amplitude exceeding a saturation threshold, set to 80 per cent of the expected maximum number of counts for the specific digitizer (Cauzzi et al 2016), are also discarded. An a-causal Butterworth bandpass filter is applied, with high-pass corner selected according to the magnitude retrieved from the EMSC event-catalogue.…”

Section: Processingmentioning

confidence: 99%

Harmonized local magnitude attenuation function for Europe using the European Integrated Data Archive (EIDA)

Bindi

Zaccarelli

Strollo

et al. 2019

Geophysical Journal International

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We derive a harmonized local magnitude scale across Europe using data disseminated by network operators through the European Integrated Data Archive (EIDA). We first calibrate simultaneously a set of non-parametric attenuation functions regionalized by considering six different regions covering central and southern Europe, anchoring the models to the Richter's scale at 17 km. Uncertainties on the attenuation coefficients, station corrections and magnitude values are evaluated through bootstrap analysis. The obtained attenuation functions show significant differences among the regions, up to 0.4 m.u. at 400 km, being the attenuation of the Wood-Anderson amplitude stronger for regions in the Mediterranean area. The nonparametric attenuation functions capture the changes in the rate of attenuation with distance due to the effects of later arrivals generated by crustal heterogeneity. A second calibration is performed to derive a parametric attenuation model. We consider a piece-wise linear function to describe the attenuation with the logarithm of distance, introducing two breakpoint distances at 10 and 60 km. For distances above 10 km, we also consider the anelastic attenuation term. We apply a mixed effect regression with network-dependent random effects on the anelastic coefficients. The parametric analysis confirms the stronger attenuation for networks operating in the Mediterranean area, such as the Italian and Greek networks, with respect to networks located in continental Europe. The network-dependent random effects allow us to quantify the between-network variability for different networks operating in the same region or country. The observed between-network variability is within ±0.2 m.u., smaller than the variability among the six regions.

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Section: Processingmentioning

confidence: 99%

Harmonized local magnitude attenuation function for Europe using the European Integrated Data Archive (EIDA)

Bindi

Zaccarelli

Strollo

et al. 2019

Geophysical Journal International

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“…Ground acceleration (left panels, black seismograms) and velocity (right panels, red seismograms) as recorded at three selected strong-motion stations located within 25 km of the epicentre of the M L 4.6 Urnerboden earthquake of March 6, 2017. The data are restituted (corrected to account for the instrumental response) to ground motions and filtered with an acausal bandpass filter between 0.3 Hz and 80% of the Nyquist frequency (for details seeCauzzi et al 2016). Site class (SIA), shallow shear-wave Vs velocity (V S,30 ) and epicentral distance (R e ) are indicated for each station Earthquakes in Switzerland in 2017 and 2018…”

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confidence: 99%

Earthquakes in Switzerland and surrounding regions during 2015 and 2016

et al. 2018

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This report summarizes the seismicity in Switzerland and surrounding regions in the years 2017 and 2018. In 2017 and 2018, the Swiss Seismological Service detected and located 1227 and 955 earthquakes in the region under consideration, respectively. The strongest event in the analysed period was the M L 4.6 Urnerboden earthquake, which occurred in the border region of cantons Uri, Glarus and Schwyz on March 6, 2017. The event was the strongest earthquake within Switzerland since the M L 5.0 Vaz earthquake of 1991. Associated ground motions indicating intensity IV were reported in a radius up to about 50 km and locally approached intensity VI in the region close to the epicentre. Derived focal mechanisms and relative hypocentre relocations of the immediate aftershocks image a NNW-SSE striking sinistral strike-slip fault. Together with other past events in this region, the Urnerboden earthquake suggests the existence of a system of sub-parallel strike-slip faults, likely within in the uppermost crystalline basement of the eastern Aar Massif. A vigorous earthquake sequence occurred close to Château-d'Oex in the Préalpes-Romandes region in western Switzerland. With a magnitude of M L 4.3, the strongest earthquake of the sequence occurred on July 1, 2017. Focal mechanism and relative relocations of fore-and aftershocks image a NNE dipping normal fault in about 4 km depth. Two similarly oriented shallow normal-fault events occurred between subalpine Molasse and Préalpes units close to Châtel-St-Denis and St. Silvester in 2017/18. Together, these events indicate a domain of NE-SW oriented extensional to transtensional deformation along the Alpine Front between Lake Geneva in the west and the Fribourg Fault in the east. The structural complexity of the Fribourg Fault is revealed by an M L 2.9 earthquake near Tafers in 2018. The event images a NW-SE striking fault segment within the crystalline basement, which might be related to the Fribourg Fault Zone. Finally, the M L 2.8 Grenchen earthquake of 2017 provides a rare example of shallow thrust faulting along the Jura fold-and-thrust belt, indicating contraction in the northwestern Alpine foreland of Switzerland.

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“…Catalogues are commonly used in seismology e.g. to collect and distribute seismic events (Godey et al, 2013), historical earthquakes information (Albini et al, 2013), strong motion parameters (Cauzzi et al, 2016), etc. To the best of our knowledge, the description and discovery of seismic waveforms in terms of their content has not been addressed so far.…”

Section: Methodsmentioning

confidence: 99%

WFCatalog: A catalogue for seismological waveform data

Trani

Koymans

Atkinson

et al. 2017

Computers & Geosciences

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This paper reports advances in seismic waveform description and discovery leading to a new seismological service and presents the key steps in its design, implementation and adoption. This service, named WFCatalog, which stands for waveform catalogue, accommodates features of seismological waveform data. Therefore, it meets the need for seismologists to be able to select waveform data based on seismic waveform features as well as sensor geolocations and temporal specifications. We describe the collaborative design methods and the technical solution showing the central role of seismic feature catalogues in framing the technical and operational delivery of the new service. Also, we provide an overview of the complex environment wherein this endeavour is scoped and the related challenges discussed. As multidisciplinary , multi-organisational and global collaboration is necessary to address today's challenges, canonical representations can provide a focus for collaboration and conceptual tools for agreeing directions. Such collaborations can be fostered and formalised by rallying intellectual effort into the design of novel scientific catalogues and the services that support them. This work offers an example of the benefits generated by involving cross-disciplinary skills (e.g. data and domain expertise) from the early stages of design, and by sustaining the engagement with the target community throughout the delivery and deployment process.

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Introducing the European Rapid Raw Strong‐Motion Database

Cited by 19 publications

References 37 publications

Harmonized local magnitude attenuation function for Europe using the European Integrated Data Archive (EIDA)

Harmonized local magnitude attenuation function for Europe using the European Integrated Data Archive (EIDA)

Earthquakes in Switzerland and surrounding regions during 2015 and 2016

WFCatalog: A catalogue for seismological waveform data

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