<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Automated detection and location of picoseismicity of hydraulic\r\nfracturing experiment using continuous waveforms"^^ . "The geothermic Fatigue Hydraulic Fracturing (FHF) in situ underground experiment (Nova project 54-14-1)\r\ntook place in the Äspö Hard Rock Laboratory, Sweden. The basic idea was to validate the FHF concept under\r\ncontrolled conditions at the -410 depth level. Conventional versus cyclic, and pulse hydraulic injection schemes\r\nwere monitored with three different monitoring arrays (Acoustic Emission [AE], Microseismic Monitoring and\r\nElectro-Magnetic) in the near- and far-field. The network was designed for high sensitivity in order to observe\r\nvery small seismic events. The AE sensors allow for sensitive recording in the frequency range 1 to 100 kHz; the\r\nsystem measuring is capable to operate in trigger and continuous mode with a sampling of 1 MHz. In this work\r\nwe consider continuous recordings and apply recently developed automated full waveform detection and location\r\nalgorithms which are based on the stacking of characteristic functions calculated from squared amplitudes.\r\nWe significantly increase the detection rate in comparison to trigger mode routines, because overlapping and\r\nweak events are resolved with our method. However, the location accuracy is not as high since waveforms are\r\nlow pass filtered. Most detection concentrated during the fluid injection occurred around the fracking stages.\r\nFrequency-magnitude distribution characteristics are investigated using a magnitude scale estimated from the\r\namplitude recorded at AE sensors. We demonstrate that the stacking of characteristic functions yields to a\r\nsignificant improvement of the detection and location also in presence of noisy records, supporting the adoption\r\nof similar techniques for other induced and natural seismic activity monitoring systems.\r\n\r\nThis work is funded by the EU H2020 SHEER project. Nova project 54-14-1 was financially supported by\r\nthe GFZ German Research Center for Geosciences (75%), the KIT Karlsruhe Institute of Technology (15%) and\r\nthe Nova Center for University Studies, Research and Development (10%). An additional in-kind contribution of\r\nSKB for using Äspö Hard Rock Laboratory as test site for geothermal research is greatly acknowledged."^^ . "2016-09" . . . . . . . . . . . . . . . . . . . . . "Torsten"^^ . "Dahm"^^ . "Torsten Dahm"^^ . . "Arno"^^ . "Zang"^^ . "Arno Zang"^^ . . "Sebastian"^^ . "Heimann"^^ . "Sebastian Heimann"^^ . . "Jose Angel"^^ . "Lopez-Comino"^^ . "Jose Angel Lopez-Comino"^^ . . "Claus"^^ . "Milkereit"^^ . "Claus Milkereit"^^ . . "Simone"^^ . "Cesca"^^ . "Simone Cesca"^^ . . . . "35th General Assembly of the European Seismological Commission"^^ . . . . . "Trieste, Italy"^^ . . . . . . "Automated detection and location of picoseismicity of hydraulic\r\nfracturing experiment using continuous waveforms (Slideshow)"^^ . . . . . "Poster_ASPO_ES_2016.pdf"^^ . . . "Automated detection and location of picoseismicity of hydraulic\r\nfracturing experiment using continuous waveforms (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Automated detection and location of picoseismicity of hydraulic\r\nfracturing experiment using continuous waveforms (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Automated detection and location of picoseismicity of hydraulic\r\nfracturing experiment using continuous waveforms (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Automated detection and location of picoseismicity of hydraulic\r\nfracturing experiment using continuous waveforms (Other)"^^ . . . . . . "small.jpg"^^ . . . "Automated detection and location of picoseismicity of hydraulic\r\nfracturing experiment using continuous waveforms (Other)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #1977 \n\nAutomated detection and location of picoseismicity of hydraulic \nfracturing experiment using continuous waveforms\n\n" . "text/html" . . . "Source parameter estimation" . . . "Sweden" . . . "Unconventional hydrocarbon extraction" . .