Author: Keith L. McDonaldPublisher:
ISBN:
Category : Cosmic magnetic fields
Languages : en
Pages : 100
Book Description
An Analysis of the Earth's Magnetic Field from 1835 to 1965
Author: Keith L. McDonaldPublisher:
ISBN:
Category : Cosmic magnetic fields
Languages : en
Pages : 100
Book Description
An Analysis of the Earth's Magnetic Field from 1935 to 1965
Author: Keith L. McDonaldPublisher:
ISBN:
Category : Geomagnetism
Languages : en
Pages : 108
Book Description
An Analysis of the Earth's Magnetic Field from 1835 to 1965
Author: Keith L. McDonaldPublisher:
ISBN:
Category : Cosmic magnetic fields
Languages : en
Pages : 100
Book Description
This work is an analysis and description of the earth's magnetic field based on observed data from the time of Gauss to the most recent epochs. An attempt was made to collect all Gauss-Schmidt coefficients of previous investigators and extensive computations were made using selections of these data. Root-mean-square representations of geomagnetic field elements are employed to depict time trends and structural dissymetries at the earth's surface and core-mantle boundary. Our analysis establishes that the magnetic dipole field is being driven destructively to smaller values by fluid motions which transform its magnetic energy into near neighboring modes rather than expend it more directly as joule heat. Concurrent with the continual decrease in field energy in the atmosphere, since 1900 at least, sixth-degree analyses indicate that the mean magnetic-energy density in the outermost layers of the core fluid has been increasing. An associated phenomenon is the continued increase in hemispheric dissymetry, the Southern Hemisphere preponderating. Defining an asymmetry ratio, our analysis infers by extrapolation that the geomagnetic field was sensibly symmetric in the year 1670 A.D. The average rate of westward drift of the geomagnetic pole during the past 130 years is 0.042 degree/year in azimuth angle, corresponding to a polar rotation period of 8.6 thousand years. The motion appears, however, to have slowed somewhat since about 1900. The polar angle shows no progressive motions.
An Analysis of the Earth's Magnetic Field from 1835 to 1965
Author: Keith L. McDonaldPublisher:
ISBN:
Category : Cosmic magnetic fields
Languages : en
Pages : 87
Book Description
The Earth's Magnetic Field : Its History, Origin, and Planetary Perspective
Author: McElhinnyPublisher: Academic Press
ISBN: 0080954634
Category : Science
Languages : en
Pages : 417
Book Description
The Earth's Magnetic Field : Its History, Origin, and Planetary Perspective
Reversals of the Earth's Magnetic Field
Author: J. A. JacobsPublisher: Cambridge University Press
ISBN: 0521450721
Category : Science
Languages : en
Pages : 357
Book Description
This 1994 book examines how reversals of the Earth's magnetic field have played a major role in establishing plate tectonics and a geological time scale.
The Genesis Flood Revisited
Author: Andrew SnellingPublisher: New Leaf Publishing Group
ISBN: 1614588260
Category : Science
Languages : en
Pages : 673
Book Description
Modeled after the 1961 ground-breaking book The Genesis Flood by Drs. Whitcomb and Morris, this detailed work builds on that classic volume with new insights from decades of work by the author, Dr. Andrew Snelling, and numerous colleagues. This recent revolution in geology and the explosion in geological research have established an even firmer basis for understanding the biblical Flood with a God-honoring foundation — the absolute authority and inerrancy of God’s Word. Examine details of the Creation Week as it builds a solid scriptural case for the Flood’s catastrophic nature and global extent. Find decisive answers to many questions about the Flood and Noah’s Ark, its construction, and the animals taken onboard. Delve deeply into astonishing geological details that unfold from the early chapters of Genesis, including the Creation Week and the pre-Flood world. Explore detailed evidence and a concise, informative 30-page color section with diagrams, maps, and more! Dr. Snelling jettisons the faulty evolutionary-uniformitarian assumptions used by most geologists and instead, interprets compelling new geological and observed field data within the biblical framework for the earth’s history. He also demonstrates that fossils were catastrophically buried in sedimentary layers being deposited rapidly on a global scale on the continental plates derived from the violent rifting apart of the original supercontinent. His work demolishes radiometric dating, the icon of the millions of years dogma, and builds a thoroughly powerful case for a young earth that explains many geological features such as varves, evaporites, coal, oil, chalk, granites, and more that biblical skeptics sadly have used to scoff at God’s Word. Discover the powerful truth behind the earth’s most enduring mysteries!
NASA Technical Note
Author: Advances in Archaeological Method and Theory
Author: Publisher: Elsevier
ISBN: 1483294307
Category : Social Science
Languages : en
Pages : 479
Book Description
Advances in Archaeological Method and Theory
Scientific and Technical Aerospace Reports
Author: Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 970
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.