Download or read book Study of the Eastern Tennessee Seismic Zone written by C. A. Powell and published by . This book was released on 1999-05-01 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Comprehensive Study of the Eastern Tennessee Seismic Zone written by Christine A. Powell and published by . This book was released on 1998 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Focal Mechanism Analysis of Eastern Tennessee Seismic Zone Earthquakes written by Hongsheng Li and published by . This book was released on 1994 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of Crustal and Upper Mantle Structure for the Eastern Tennessee Seismic Zone Using P wave Transfer Functions written by Jordan H. Graw and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We develop crust and mantle models of the Eastern Tennessee Seismic Zone (ETSZ) using imaging and inversion of the radial component P-wave transfer functions for stations in the Center for Earthquake Research and Information's (CERI) eastern Tennessee seismic network. We find complex structure in the upper 10 km in addition to an upper mantle high velocity zone with Vp values from 8̃.2-8.56 km/s. This high velocity zone most likely extends from the west into the ETSZ and may be preserved mantle structure from the Granite Rhyolite province. Moho in the area is mostly gradational. However, velocity discontinuities can be seen at places indicating a fairly stable Moho depth of 4̃5-50 km. We suggest that the NY-AL lineament represents a major deep crustal to upper mantle feature.

Download or read book Seismotectonic Model of the Eastern Tennessee Seismic Zone written by Gordana Vlahovic and published by . This book was released on 1999 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Some Seismic Studies in Central and Eastern Tennessee written by Emmanuel Sergeyevich Sodbinow and published by . This book was released on 1977 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Detailed Geologic Studies of Paleoseismic Features Exposed at Sites in the East Tennessee Seismic Zone written by Kathleen Frances Warrell and published by . This book was released on 2013 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: The East Tennessee seismic zone (ETSZ) is the second most active in the eastern United States, but recorded earthquakes do not exceed Mw̳ [moment magnitude] = 4.6. Earthquake epicenters are located 5-26 kilometers deep in autochthonous basement, and faults producing these earthquakes do not break the surface. Detailed paleoseismic investigations at sites within the ETSZ include: detailed geological mapping, trenching, aerial photograph reconnaissance, X-ray diffraction (XRD), grain-size analysis, and optically stimulated luminescence dating of alluvium. Site DL-6 near Dandridge, Tennessee, reveals a complex array of features providing evidence that at least 4‒6 Mw̳ > 6 earthquakes affected the area. A thrust fault with ~1 meter displacement is traceable for ~50 meters in the mapped area from Quaternary terrace sediments into Ordovician Sevier Shale saprolite where it develops multiple splays. This fault truncates a 30 centimeter-wide Quaternary sediment-filled fissure; the fissure is also offset ~10 centimeters by a small strike-slip fault that truncates against a splay of the main thrust fault. The fissure may be traceable for over 2 kilometers across Douglas Reservoir. Fault surface and slickenline orientations indicate west-vergent slip on many thrust splay surfaces. Fracture orientations measured at site DL-6 are close to those in Sevier Shale here; reactivation of near-vertical fractures is mostly strike-slip. Additionally, shale chips in Quaternary sediment at a nearby site at Dandridge, Tennessee, contain the same mineralogy as underlying Sevier Shale, indicating that these chips may have been liquefied and brought up through Quaternary terrace sediments during an earthquake. Sites along the Chattooga River near Lyerly, Georgia, provide evidence for at least one Mw̳ > 6 earthquake. Sand dikes emanating from a source bed in a cut bank contain liquefiable sediments that intruded overlying cap sediments; grain-size and XRD analyses suggest cap sediments are more clay-rich than source or dike sediments. Aerial photographs of the area contain elliptical discontinuities that may represent sand blow deposits. Field reconnaissance of the area identified possible feeder dikes to sand blows; further investigation is required. Collectively, these data provide substantial evidence for the occurrence of Mw̳ > 6 earthquakes in the ETSZ, and motivate further paleoseismic studies here.

Download or read book Seismic Investigations in Eastern Tennessee written by Edward R. Tegland and published by . This book was released on 1978 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Seismogenic Study of the Central and Eastern United States written by Blaine Bockholt and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Part 1: A phased array of 19 broadband seismometers was deployed from November 2009 to September 2011 to detect nonvolcanic tremor associated with the Reelfoot fault. An autodetection algorithm using broadband frequency & ndash;wavenumber analysis was used to search for the recurrence of signals. The original signals, detected in 2006, appeared as short duration, impulsive arrivals with a high phase velocity. We identify thousands of signals during the experiment. Two azimuthal peaks are observed arriving from the west and northeast. The detections are similar to the events seen in 2006 and are inferred to come from very small ML=-1 microearthquakes occurring in shallow basement faults. Most signals arrive with coherent S-wave energy which implies very small local and regional earthquakes. Other signals show distinct changes in slowness and azimuth as a function of time. These events were interpreted as atmospheric acoustic sources. The high-frequency content and impulsive arrivals of the nonacoustic arrivals are not consistent with traditional tectonic tremor but indicate seismic activity in the crust near the Reelfoot thrust fault. Part 2: Waveforms from the Eastern Tennessee Seismic Network are corrected to the nominal Wood & ndash;Anderson (WA) torsion seismometer to obtain a total of 11,905 amplitudes to determine a local magnitude scale for the Eastern Tennessee Seismic Zone (ETSZ). We obtain the following distance correction function: -log10(A0)=0.538log10(r/17) & minus;0.0002516(r-17)+2.0 from our inversion. The -log10(A0) is very flat at distances> 200 & thinsp; & thinsp;km, suggesting low distance attenuation at local and near-regional distances. The b-values for the currently reported duration magnitude is 0.9. Part 3: Dispersion measurements obtained from ambient noise tomography and earthquake data are combined with radial receiver functions from 134 stations to invert for a high resolution shear-wave velocity model of the ETSZ. We obtain velocities models to depths of 200 km to obtain information about the structure of the crust and upper mantle. We detect a strong velocity contrast across the vertical projection of the New York & ndash;Alabama lineament which we attribute to an ancient strike-slip fault. We also observe a low-velocity zone in the upper mantle which could be the base of the continental lithosphere in this area. The majority of the depths of this low velocity zone begin around 125 km.

Download or read book Basement Faults in the East Tennessee Seismic Zone written by Stephen A. Tavernier and published by . This book was released on 2002 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Earth s Catastrophic Past and Future written by William Hutton and published by Universal-Publishers. This book was released on 2004-08 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt: Edgar Cayce, America's best documented psychic, gave upwards of 44 readings that dealt with lost continents, geophysical changes to Earth beginning 1958-1998, and a pole shift due to begin about now. In this book, geologist William Hutton and researcher Jonathan Eagle look for correspondences between results of geophysical research studies and psychic descriptions of prehistoric catastrophes. They also seek scientifically to test readings' predictions of catastrophic Earth changes, all the while investigating the following fascinating subjects: * Development and calibration of a comprehensive pole-shift model * The countries predicted to be most affected by a sudden, 1° pole shift. * The geologic trend for a mineralized gold vein at Bimini, Bahamas. * The authors' discoveries of correlations between: - a 2002 arctic earthquake and the eruption of torrid-area volcanoes, - the dropping of atom bombs in 1945 and a significant increase in sunspots following, and - the peaceable nature of Europe in 1645-1715 and the period's near total lack of sunspots. (Cayce readings implied or predicted all three phenomena.) * The first-ever analysis of the sources of Cayce's channeled readings, including a ranking of the veracity and reliability of the most important Earth changes and pole-shift readings. * Moralistic reasons for future catastrophic geophysical changes to Japan, China, and America. * Locations of post-pole-shift safety lands in Canada and America. * Locations of the records of the Atlantean civilization, to be found when Earth changes begin. * How to awaken to the New Cycle presently opening before humanity. * Evidence for Atlantis in the mid-Atlantic ridge area and for Lemuria (or Mu) in the Pacific. * The consuming religious war in which we find ourselves, and an answer to world conditions today. * Visions of an imminent Age-ending fire, as found in a Cayce reading, in a channeled book by Phylos the Tibetan, and in the 1960s visions of girls at Garabandal, Spain. * Doubtful interpretations of Earth-changes and pole-shift readings advanced by managers and writers of Cayce's legacy organization, the Association for Research and Enlightenment, Inc. From the Foreword by the Editor: "The acid test of pole shift and other Earth change predictions is their scientific credibility. If true, momentous societal and political changes are imminent. The geopolitical map of the world will be redrawn. The authors are exploring the transition from the end of one Age to the beginning of another."

Download or read book A Seismic Tomographic Study of the Mojave Region and Geophysical Constraints on Thrust Belt Structure in Eastern Tennessee written by Julia Laws Whitelaw and published by . This book was released on 1996 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Interpretation of Seismic Cross Sections in the Valley and Ridge of Eastern Tennessee written by Robert C. Milici and published by . This book was released on 1979 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A New Set of Focal Mechanisms and a Geodynamic Model for the Eastern Tennessee Seismic Zone written by Matthew T. Cooley and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A new set of focal mechanisms is determined for the eastern Tennessee seismic zone (ETSZ). The 26 solutions are consistent with previous solutions in the northern and middle portions of the ETSZ and extend coverage into the southern portion. The solutions exhibit strike-slip and oblique normal faulting, with nodal planes generally oriented N-S/E-W and NE-SW/NW-SE. Strike-slip solutions dominate the middle and northern portions of the zone. To the south, near the Tennessee/Georgia border, a group of focal mechanisms for relatively shallow events exhibit normal faulting. To examine a possible cause of the normal faulting, a geodynamic model is developed which simulates a delamination of the lower crust. Evidence for delamination has been seen elsewhere in the southern Appalachians. Results from this model suggest that delamination is a possible cause of localized, shallow normal faulting.

Download or read book U S Geological Survey Bulletin written by and published by . This book was released on 1983 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Seismic Refraction Survey in Eastern Tennessee written by William Mark Powers and published by . This book was released on 1985 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Resources of Tennessee written by Tennessee. State Geological Survey and published by . This book was released on 1913 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: