Seasonal and Diurnal Variations in Long‐Period Noise at SPREE Stations: The Influence of Soil Characteristics on Shallow Stations’ Performance

Wolin, Emily; Lee, Suzan van der; Bollmann, T. A.; Wiens, Douglas A.; Revenaugh, J.; Darbyshire, F. A.; Frederiksen, A. W.; Stein, Seth; Wysession, M. E.

doi:10.1785/0120150046

Cited by 47 publications

(41 citation statements)

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“…Webb 2002), by building warping primarily due to temperature changes, and by the sensor-to-ground coupling. The long-period records from installations on soft sediments can also suffer from changes in soil properties due to temperature variations and water content (Wolin et al, 2015). We cannot relate the long-period horizontal noise at stations to a specific housing type or sensor shelter but we notice, as expected, a strong improvement of the long-period components when thermal isolation is installed during site tests.…”

Section: Network Performancesmentioning

confidence: 57%

Swiss-AlpArray temporary broadband seismic stations deployment and noise characterization

et al. 2016

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Abstract. AlpArray is a large collaborative seismological project in Europe that includes more than 50 research institutes and seismological observatories. At the heart of the project is the collection of top-quality seismological data from a dense network of broadband temporary seismic stations, in compliment to the existing permanent networks, that ensures a homogeneous station coverage of the greater Alpine region. This Alp Array Seismic Network (AASN) began operation in January 2016 and will have a duration of at least 2 years. In this work we report the Swiss contribution to the AASN, we concentrate on the site selection process, our methods for stations installation, data quality and data management. We deployed 27 temporary broadband stations equipped with STS-2 and Trillium Compact 120 s sensors.The deployment and maintenance of the temporary stations across 5 countries is managed by ETH Zurich and it is the result of a fruitful collaboration between five institutes in Europe.

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Section: Network Performancesmentioning

confidence: 57%

Swiss-AlpArray temporary broadband seismic stations deployment and noise characterization

et al. 2016

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“…The SPREE stations were deployed for 2.5 years between April 2011 and October 2013 [ Wolin et al , ]. We visually inspected three‐component SPREE seismograms of teleseismic earthquakes with magnitudes over M w 5.5 that occurred during this period from 30° to 90° from the array's center (Figure a).…”

Section: Data and Methodsologymentioning

confidence: 99%

Distinct crustal structure of the North American Midcontinent Rift from P wave receiver functions

et al. 2016

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Eighty‐two broadband seismic stations of the Superior Province Rifting Earthscope Experiment (SPREE) collected 2.5 years of continuous seismic data in the area of the high gravity anomaly associated with the Midcontinent Rift (MCR). Over 100 high‐quality teleseismic earthquakes were used for crustal P wave receiver function analysis. Our analysis reveals that the base of the sedimentary layer is shallow outside the MCR, thickens near the flanks where gravity anomalies are low, and shallows again in the MCR's center where the gravity anomalies peak. This pattern is similar to that found from local geophysical studies and is consistent with reverse faulting having accompanied the cessation of rifting at 1.1 Ga. Intermittent intracrustal boundaries imaged by our analysis might represent the bottom of the MCR's mostly buried dense volcanic layers. Outside the MCR, the Moho is strong, sharp, and relatively flat, both beneath the Archean Superior Province and the Proterozoic terranes to its south. Inside the MCR, two weaker candidate Mohos are found at depths up to 25 km apart in the rift's center. The intermediate layer between these discontinuities tapers toward the edges of the MCR. The presence of this transitional layer is remarkably consistent along the strike of the MCR, including beneath its jog in southern Minnesota, near the Belle Plaine Fault. We interpret these results as evidence for extensive underplating as a defining characteristic of the rift, which remains continuous along the Minnesota jog, where due to its orientation, it is minimally affected by the reverse faulting that characterizes the NNE striking parts of the rift.

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“…Some of the stations exhibit distinct seasonal variations of noise level, which results in the exceeding of the noise limit in the longperiod range of the horizontal components ( Fig. 5; Wolin et al, 2015).…”

Section: Deployment Of Mobnet Stations Within the Alparray Projectmentioning

confidence: 99%

Data quality control and tools in passive seismic experiments exemplified on the Czech broadband seismic pool MOBNET in the AlpArray collaborative project

Vecsey

Plomerová

Jedlička

et al. 2017

Geosci. Instrum. Method. Data Syst.

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Abstract. This paper focuses on major issues related to the data reliability and network performance of 20 broadband (BB) stations of the Czech (CZ) MOBNET (MOBile NETwork) seismic pool within the AlpArray seismic experiments. Currently used high-resolution seismological applications require high-quality data recorded for a sufficiently long time interval at seismological observatories and during the entire time of operation of the temporary stations. In this paper we present new hardware and software tools we have been developing during the last two decades while analysing data from several international passive experiments. The new tools help to assure the high-quality standard of broadband seismic data and eliminate potential errors before supplying data to seismological centres. Special attention is paid to crucial issues like the detection of sensor misorientation, timing problems, interchange of record components and/or their polarity reversal, sensor mass centring, or anomalous channel amplitudes due to, for example, imperfect gain. Thorough data quality control should represent an integral constituent of seismic data recording, preprocessing, and archiving, especially for data from temporary stations in passive seismic experiments. Large international seismic experiments require enormous efforts from scientists from different countries and institutions to gather hundreds of stations to be deployed in the field during a limited time period. In this paper, we demonstrate the beneficial effects of the procedures we have developed for acquiring a reliable large set of high-quality data from each group participating in field experiments. The presented tools can be applied manually or automatically on data from any seismic network.

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Seasonal and Diurnal Variations in Long‐Period Noise at SPREE Stations: The Influence of Soil Characteristics on Shallow Stations’ Performance

Cited by 47 publications

References 50 publications

Swiss-AlpArray temporary broadband seismic stations deployment and noise characterization

Swiss-AlpArray temporary broadband seismic stations deployment and noise characterization

Distinct crustal structure of the North American Midcontinent Rift from P wave receiver functions

Data quality control and tools in passive seismic experiments exemplified on the Czech broadband seismic pool MOBNET in the AlpArray collaborative project

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