<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Evidence of Possible Induced Seismicity in the Wabash Valley Seismic Zone from Improved Microearthquake Locations"^^ . "To evaluate the spatial structure of seismicity in the Wabash Valley of\nsouthern Indiana and Illinois, we analyzed data from a temporary seismic network\nthat included 10 three-component, short-period seismometers and a 10-component\ndense phased array. We produced the first comprehensive catalog of local earthquakes recorded during the 211-day deployment, from November 1995 through June\n1996. The results are dominated by a cluster of 534 microearthquakes, with magnitudes ranging from 0.6 to 1.8, near the town of New Harmony, Indiana, that were\ndetected and recorded only by the phased array. The remarkable similarity of the\ncluster events in terms of waveform, magnitude, and temporal distribution suggests\na tightly spaced grouping from a single seismic source. We relocated the earthquakes\nusing improved relative arrival times of P and S waves computed by time-domain\ncross-correlation of the vertical beam traces and by complex cross-correlation of the\nhorizontal beam traces, respectively. Additional constraints on absolute locations\nwere applied using a graphical method of arrival-time difference analysis for six\nearthquakes recorded by two network stations outside the phased array. The resulting\nlocations define a tight spatial grouping about a zone of post-Paleozoic faulting just\nwest of the Indiana-Illinois border, in White County, Illinois. Average source depths\nfrom phased-array location methods and waveform modeling with synthetic seismograms indicate, in contrast to larger events in the region, that the earthquakes\noccurred at depths less than 4 km, within the sedimentary section of the Illinois\nBasin. We propose that these earthquakes are artificially induced events, likely related\nto water injection for the purpose of secondary recovery of petroleum in the Illinois\nBasin. The primary evidence for this includes: (1) tight spatial clustering of earthquakes; (2) unusually shallow earthquake depths; (3) good spatial correlation of the\nrelocated hypocenters to existing wells and oil fields; and (4) highly repetitive events\nwith only a small range in magnitude."^^ . "2006-10" . . "96" . "5" . . "Seismological Society of America"^^ . . . "Bulletin of the Seismological Society of America"^^ . . . "00371106" . . . . . . . . . . . . . "M. W."^^ . "Hamburger"^^ . "M. W. Hamburger"^^ . . "G. L."^^ . "Pavlis"^^ . "G. L. Pavlis"^^ . . "K. C."^^ . "Eagar"^^ . "K. C. Eagar"^^ . . "Department of Geological Sciences Indiana University 1001 East 10th Street Bloomington, Indiana 47405-1405"^^ . . . "Department of Geological Sciences, Arizona State Uni- versity, Box 871494, Tempe, Arizona 85287-1404"^^ . . . . . . "HTML Summary of #1378 \n\nEvidence of Possible Induced Seismicity in the Wabash Valley Seismic Zone from Improved Microearthquake Locations\n\n" . "text/html" . . . "USA" . . . "General about inducing technology types" . . . "Method and procesing" . .