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Search results for: geophysic* in all categories
637 results found.
64 pages of results.
41. Sunspots and Earthquakes [Thunderbolts Website]
... strong EM signals and magnetic anomalies that have been documented before some earthquakes. Unfortunately, when a set of observations cannot be explained within the framework of existing knowledge, the tendency is not to believe the observation. Therefore, a general malaise has taken root in the geophysical community when it comes to the many reported non-seismic and non-geodesic pre-earthquake phenomena There seems to be no bona fide physical process by which electric currents of sufficient magnitude could be generated in crustal rocks." Freund makes an excellent attempt to explain all of the phenomena in ... prone to it. It is not clear how such a trigger might work. In the Journal of Scientific Exploration, Vol. 17, No. 1, pp. 37 – 71, 2003, there is an excellent report that addresses the more down-to-earth problems facing geophysicists trying to understand earthquakes. The paper is titled, Rocks That Crackle and Sparkle and Glow: Strange Pre-Earthquake Phenomena, by Dr. Friedemann T. Freund, a professor in the Department of Physics, San Jose State University, and a senior researcher at NASA ...
42. Did Cosmic Impact Change Earth's Tilt? [SIS Internet Digest $]
... up and I realized that the same solution could solve both problems. Jenkins of Penn State's College of Earth and Mineral Sciences explains his solution in two papers presented today (Dec. 14) and tomorrow (Dec. 15) at the Fall Meeting of the American Geophysical Union in San Francisco. The papers are "The high obliquity solution to understanding Archean climate and the faint-young sun paradox," and "Climate model solutions to late Proterozoic glaciation," written with Steven R. Smith, a recent Penn State meteorology graduate. ... Researchers suggest that total global glaciation occurred three times. Although a collision can be cited as the source of the 70-degree tilt, the question of what untilted the planet remains because today's tilt is about 23 degrees from vertical. "George Williams, department of geology and geophysics, University of Adelaide, originally proposed the tilt and suggested that if a large enough mass built up on the pole, it could untilt," said Jenkins. "At the end of the Precambrian, most of the Earth's land mass was centered around the ...
43. Science Frontiers [SIS Internet Digest $]
... machines, such as they were in 1886! There are hundreds of anecdotes and descriptions of curious phenomena, such as: Remarkable echoes in Siberia; Luminous dust; Elf Candles; The 1838 Spout of Calcutta, and Moon blindness. It is a classic collection of geophysical anomalies and curiosities. Available from Sourcebook Project, P.O. Box 107, Glen Arm, MD 21057. USA. Tel: +1 (410) 668 6047. ... ; Skipping; Graveyards; Degeneration; Fossil Men. Price was a creationist, but his book is devoid of theology. The Aerial World by G. Hartwig 1886, 560 pp., $26.95p. 37 chapters touch on just about every facet of weather and geophysics known: The echo; Waterspouts; The Rainbow; The thunderstorm; St. Elmo's fire; and even flying machines, such as they were in 1886! There are hundreds of anecdotes and descriptions of curious phenomena, such as: Remarkable echoes in Siberia; ...
44. Icy minicomets caught by a satellite camera? [Science Frontiers Website]
... or she suggests that the earth is bombarded each by 20 house-size, icy minicomets. Well, L. Frank, University of Iowa, did just that in 1986. He was duly pilloried for his trouble. But, at the 1997 spring meeting of the American Geophysical Union, Frank presented new data to back up his previous assertions. The most startling of his new evidence came from a camera aboard a NASA satellite. Time-lapse photos imaged two objects streaking into the atmosphere over Poland and Germany. Frank identified these as clouds of ... Science Frontiers ONLINE No. 112: Jul-Aug 1997 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Icy minicomets caught by a satellite camera? A geophysicist really risks his or her reputation if he or she suggests that the earth is bombarded each by 20 house-size, icy minicomets. Well, L. Frank, University of Iowa, did just that in 1986. He was duly pilloried for his trouble. But, at the 1997 spring meeting of the American Geophysical Union, Frank presented ...
45. "BLUE JETS" EMITTED UPWARD FROM TOPS OF THUNDERCLOUDS [Science Frontiers Website]
... during a 22-minute interval during a storm over Arkansas. We examine some possible mechanisms. but have no satisfactory theory of this phenomenon." (Wescott, E.M., et al; "Preliminary Results from the Sprites94 Aircraft Campaign: 2. Blue Jets," Geophysical Research Letters, 22:1209, 1995.) Comment. The blue jets may be related to other controversial phenomena that suggest surface-to-ionosphere electrical discharges, such as mountain-top glows and low-level auroras, as presented in our catalog Lightning, Auroras. A description of this ... Science Frontiers ONLINE No. 103: Jan-Feb 1996 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects "BLUE JETS" EMITTED UPWARD FROM TOPS OF THUNDERCLOUDS Geophysicists have recently recognized that something very strange transpires above thunderclouds. First, there is the phenomenon we have called "rocket lightning" in our books and newsletters. Scientists now call these upwardly directed discharges "sprites." (SF#84) The sprites are short-duration red flashes in the ionosphere, sometimes with bluish tendrils extending down ...
46. 90-DAY SEA-LEVEL OSCILLATION AT WAKE ISLAND [Science Frontiers Website]
... the energy source is eddies generated off the Big Island of Hawaii. These eddies appear to be associated with westward currents that intermittently impinge on the island." (Mitchum, Gary T.; "The Source of 90-Day Oscillations at Wake Island," Journal of Geophysical Research, 100:2459, 1995.) Comment. Such eddies would have to persist for long periods to survive the long trip to Wake Island some 2500 miles away. In this, they must be like the current rings that break off from the Gulf ... Online All Issues This Issue Sourcebook Project Sourcebook Subjects 90-DAY SEA-LEVEL OSCILLATION AT WAKE ISLAND Most North Americans are familiar with rather powerful diurnal tides. The oceans, however, also move in ponderous cycles that beachcombers can never appreciate. Thanks to data from Geosat's precision altimeter, geophysicists can now discern some of these long-period moving patterns on the oceans' surfaces. "Energetic 90-day oscillations of sea levels have been intermittently observed at Wake Island in the western tropical Pacific during the past 2 decades. The oscillations tend to occur about 1.5 years after ...
47. Antipodal Hotspot Pairs [Science Frontiers Website]
... create such a distribution include: (1) symmetry in the generation of mantle plumes; and (2) melting related to antipodal focusing of seismic energy from large-body impacts." (Rampino, Michael R.; "Antipodal Hotspot Pairs on the Earth," Geophysical Research Letters, 19:2011, 1992.) Similar Phenomenon. On the moon, the magcons (magnetic concentrations) seem to be located diametrically opposite large lunar impact basins. See ALZ3 in The Moon and the Planets. This catalog volume is described here ... 1993 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Antipodal Hotspot Pairs Hotspots are isolated areas of the earth's crust where there is an unusually large amount of basaltic volcano activity. At present, over 120 hotspots are recognized by geophysicists-- and they are not distributed randomly about the globe. In fact, many seem to be diametrically opposite one another, as described by M.R. Rampino: "The observed number of antipodal hotspot pairs depends on the maximum allowable deviation from exact antipodality, ...
48. Thera: Chronology at a Crossroads? [SIS C&C Workshop $]
... ., 'Continuous Impurity Analysis Along the Dye 3 Deep Core', in C. C. Langway Jr., H. Oeschger, and W. Dansgaard (eds.), Greenland Ice Core: Geophysics, Geochemistry, and the Environment (Washington: American Geophysical Union 1985), p.91. Rose, op. cit. [12, p.53, is surely incorrect in his interpretation of this chart: the 1644 BC acid signal is represented there. Mr Ellenberger now regards the major test for catastrophism to be the absence ... the chart given by C. U. Hammer et al., 'Continuous Impurity Analysis Along the Dye 3 Deep Core', in C. C. Langway Jr., H. Oeschger, and W. Dansgaard (eds.), Greenland Ice Core: Geophysics, Geochemistry, and the Environment (Washington: American Geophysical Union 1985), p.91. Rose, op. cit. [12, p.53, is surely incorrect in his interpretation of this chart: the 1644 BC acid signal is represented there. Mr Ellenberger ...
49. Continuity At The Conrad Discontinuity [Science Frontiers Website]
... Science Frontiers ONLINE No. 67: Jan-Feb 1990 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Continuity At The Conrad Discontinuity From the study of seismic waves, geophysicists have determined that between 7.5 and 8.6 kilometers below the surface there exists a clear-cut "discontinuity." Practically speaking, this means that above this layer seismic waves travel at a markedly different velocity than they do below it. This discontinuity is so widespread, occurring beneath all of the continents, that it has received a ... name: the Conrad Discontinuity. Ordinarily, a geophysicist would expect to find a significant change in rock type when drilling through such a strong discontinuity. It was widely expected that, at the Conrad Discontinuity, drillers would find the granitic rocks typical of the continents changing suddenly into basalt, which is thought to make up the lower reaches of the earth's crust. However, when Soviet drills pierced the Conrad Discontinuity below the Kola Peninsula, they found no such switchover to basalt at all. In fact, they hadn't even found it ...
50. THE LATELY TORTURED EARTH: Foreword [Quantavolution Website]
... aim to be theoretical. I do not wish to pile up horrific details, nor do I. By 'Earth' of course is meant our familiar globe, cracked and slightly irregular, with its high speed motions and far stretching atmosphere. We are interested in the geophysical column that extends radially from a presumably iron and nickel center, through an enormous mantle of molten rock and water, to where the biosphere dwells, then outwards by means of gases and electric charges to beyond the Moon. We seek to know what has happened ... , whose numbers will include, I suppose, liberally educated gentlepersons, bombthrowing intruders, and the specialist who seeks interdisciplinary enlightenment. Who, nowadays, among scientists and scholars, need not broaden his scopes anxiously and hopefully beyond his strict area of competence? Specialists in geophysics are unlikely to know archaeoastronomy or the sociology of science. An expert on radio-chronometry may be at a loss in archaeological chronology. Everyone must become an amateur to enter the lists of cosmogony, where the theory of quantavolution seeks to establish itself. It hardly needs ...
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