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An Examination Of Selected Geomagnetic Indices In Relation To The Sunspot Cycle
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Book Synopsis An Examination of Selected Geomagnetic Indices in Relation to the Sunspot Cycle by : National Aeronaut Administration (Nasa)
Download or read book An Examination of Selected Geomagnetic Indices in Relation to the Sunspot Cycle written by National Aeronaut Administration (Nasa) and published by . This book was released on 2020-08-18 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Previous studies have shown geomagnetic indices to be useful for providing early estimates for the size of the following sunspot cycle several years in advance. Examined this study are various precursor methods for predicting the minimum and maximum amplitude of the following sunspot cycle, these precursors based on the aa and Ap geomagnetic indices and the number of disturbed days (NDD), days when the daily Ap index equaled or exceeded 25. Also examined is the yearly peak of the daily Ap index (Apmax), the number of days when Ap greater than or equal to 100, cyclic averages of sunspot number R, aa, Ap, NDD, and the number of sudden storm commencements (NSSC), as well the cyclic sums of NDD and NSSC. The analysis yields 90-percent prediction intervals for both the minimum and maximum amplitudes for cycle 24, the next sunspot cycle. In terms of yearly averages, the best regressions give Rmin = 9.8+/-2.9 and Rmax = 153.8+/-24.7, equivalent to Rm = 8.8+/-2.8 and RM = 159+/-5.5, based on the 12-mo moving average (or smoothed monthly mean sunspot number). Hence, cycle 24 is expected to be above average in size, similar to cycles 21 and 22, producing more than 300 sudden storm commencements and more than 560 disturbed days, of which about 25 will be Ap greater than or equal to 100. On the basis of annual averages, the sunspot minimum year for cycle 24 will be either 2006 or 2007. Wilson, Robert M. and Hathaway, David H. Marshall Space Flight Center NASA/TP-2006-214711, M-1178 SUNSPOTS; SUNSPOT CYCLE; GEOMAGNETISM; SUDDEN STORM COMMENCEMENTS; CYCLES; ESTIMATES
Book Synopsis Spectrum of the Geomagnetic Activity Index Ap by : Stanford University. Stanford Electronics Laboratories
Download or read book Spectrum of the Geomagnetic Activity Index Ap written by Stanford University. Stanford Electronics Laboratories and published by . This book was released on 1971 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ionospheric propagation of high-frequency radio waves is profoundly influenced by the variations of sunspot numbers and of geomagnetic activity. Thus, details of these variations, and of the relationship between them, has practical application. The variation of the geomagnetic activity index Ap over the 38-year interval January, 1932 through January, 1970 differs in several important characteristics from the variation of sunspot numbers over the same interval. A spectral analysis approach was used d to investigate this variation of AP, as well as its relation to the variation of sunspot numbers. The data analyzedconsisted of the 457 monthly average AP indices (AP) for the interval and the corresponding observed monthly sunspot numbers. Several large samples of the original daily Ap indices were also analyzed. Two of the latter samples covered 11-year intervals (April 1, 1944 - June 2, 1955; and June 1, 1956 - July 31, 1967) and the third covered a 23-year interval (April 1, 1944 - December, 1967). (Author).
Book Synopsis Coronal Holes and High Speed Wind Streams by : Jack B. Zirker
Download or read book Coronal Holes and High Speed Wind Streams written by Jack B. Zirker and published by . This book was released on 1977 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Solar Wind — Magnetosphere Coupling by : Y. Kamide
Download or read book Solar Wind — Magnetosphere Coupling written by Y. Kamide and published by Springer. This book was released on 1986-11-30 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on papers from an AGU Chapman Conference on Solar Wind-Magnetosphere Coupling, held at the Jet Propulsion Laboratory of the California Institute of Technology, Pasadena, Calif., Feb. 12-15, 1985.
Book Synopsis Space Weather Monitoring by Ground-Based Means by : Oleg Troshichev
Download or read book Space Weather Monitoring by Ground-Based Means written by Oleg Troshichev and published by Springer Science & Business Media. This book was released on 2012-02-10 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book demonstrates that the method, based on the ground polar cap magnetic observations is a reliable diagnosis of the solar wind energy coming into the magnetosphere Method for the uninterruptive monitoring of the magnetosphere state (i.e. space weather). It shows that the solar wind energy pumping power, can be described by the PC growth rate, thus, the magnetospheric substorms features are predetermined by the PC dynamics. Furthermore, it goes on to show that the beginning and ending of magnetic storms is predictable. The magnetic storm start only if the solar energy input into the magnetosphere exceeds a certain level and stops when the energy input turns out to be below this level.
Book Synopsis Double Sunspot-cycle Variation in Terrestrial Magnetic Activity, 1884-1963 by : Edwin J. Chernosky
Download or read book Double Sunspot-cycle Variation in Terrestrial Magnetic Activity, 1884-1963 written by Edwin J. Chernosky and published by . This book was released on 1966 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Solar Dynamics Observatory by : Phillip Chamberlin
Download or read book The Solar Dynamics Observatory written by Phillip Chamberlin and published by Springer Science & Business Media. This book was released on 2012-05-05 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is dedicated to the Solar Dynamics Observatory (SDO), which was launched 11 February 2010. The articles focus on the spacecraft and its instruments: the Atmospheric Imaging Assembly (AIA), the Extreme Ultraviolet Variability Experiment (EVE), and the Helioseismic and Magnetic Imager (HMI). Articles within also describe calibration results and data processing pipelines that are critical to understanding the data and products, concluding with a description of the successful Education and Public Outreach activities. This book is geared towards anyone interested in using the unprecedented data from SDO, whether for fundamental heliophysics research, space weather modeling and forecasting, or educational purposes. Previously published in Solar Physics journal, Vol. 275/1-2, 2012. Selected articles in this book are published open access under a CC BY-NC 2.5 license at link.springer.com. For further details, please see the license information in the chapters.
Book Synopsis Geophysical Abstracts by : Geological Survey (U.S.)
Download or read book Geophysical Abstracts written by Geological Survey (U.S.) and published by . This book was released on 1969 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geophysical Abstracts ... written by and published by . This book was released on 1969-07 with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Corotating Interaction Regions by : A. Balogh
Download or read book Corotating Interaction Regions written by A. Balogh and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Corotating Interaction Region (CIR) is the result of the interaction of fast solar wind with slower solar wind ahead. CIRs have a very large three-dimensional ex tent and are the dominant large-scale structure in the heliosphere on the declining and minimum phase of the solar activity cycle. Until recently, however, CIRs could only be observed close to the ecliptic plane, and their three-dimensional structure was therefore not obvious to observers and theoreticians alike. Ulysses was the first spacecraft allowing direct exploration of the third dimen sion of the heliosphere. Since 1992, when it has entered a polar orbit that takes it 0 up to 80 latitude, the spacecraft's performance has been flawless and the mission has provided excellent data from a superbly matched set of instruments. Perhaps the most exciting observation during Ulysses' first passage towards the south pole of the Sun was a strong and long lasting CIR whose energetic particle effects were observed up to unexpectedly high latitudes. These observations, documented in a number of publications, stimulated considerable new theoretical work.
Book Synopsis Extreme Space Weather by : Ryuho Kataoka
Download or read book Extreme Space Weather written by Ryuho Kataoka and published by Elsevier. This book was released on 2022-05-03 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extreme Space Weather not only allows readers to learn the basics of complex space weather phenomena and future directions for research in space physics and extreme space events. The book begins with a brief overview of space weather, including sunspot cycles, solar winds and geomagnetic fields. From there, the book moves on to extreme space weather phenomena, including mass coronal ejections, solar flares and magnetic storms. The book also includes a discussion of both observed and theoretical extreme events. This book is ideal for students and researchers in geophysics and space physics departments, as well as those in hazard and disaster preparedness. Focuses on extreme space weather and its impacts on Earth, the Moon and Mars Includes hazard maps showing data and impacts on Earth from extreme space weather events Presents research on both observed and theoretical extreme events
Book Synopsis Physics of Geomagnetic Phenomena by : S. Matsushita
Download or read book Physics of Geomagnetic Phenomena written by S. Matsushita and published by Elsevier. This book was released on 2016-06-03 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physics of Geomagnetic phenomena, Volume I covers the significant advances in geomagnetism and the penetrations into the generation of geomagnetic field phenomena. This volume is composed of three chapters. Chapter I deals briefly with the discovery and developments in geomagnetism, followed by discussions on some fundamental topics of the field, including the aurora and geomagnetic storms. This chapter also considers the instruments, geomagnetic stations, and the correlations between geomagnetic indices. Chapter II describes the magnetic properties of minerals and various processes of acquisition of remanent magnetization. This chapter also provides palaeomagnetic data for the direction and intensity of the geomagnetic field in ancient times. Chapter III explores geomagnetic variations caused by solar flares and eclipses. This book will prove useful to physicists, students in upper atmospheric and space topics, and scientists in allied fields with a background in geomagnetism.
Book Synopsis Preliminary Analysis of Regional-precipitation Periodicity by : Charles A. Perry
Download or read book Preliminary Analysis of Regional-precipitation Periodicity written by Charles A. Perry and published by . This book was released on 1980 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Precipitation variability plays a major role in nearly every aspect of the hydrologic cycle. Precipitation is not a random event, but it occurs after a sequence of prerequisites has been fulfilled. Recent investigations have shown that activity of the sun can affect atmospheric vorticity, an important factor in precipitation formation. Solar activity is known to be periodic; therefore, through a complex series of physical processes, precipitation variance is solar forced to a certain degree. A preliminary analysis of precipitation periodicity was made for eight regions scattered across the central United States. Each region contained 5 to 10 stations with long-term precipitation records that were averaged to obtain yearly regional-precipitation values. Graphic analysis shows 11-year and 22-year cycles that are nearly in phase with the solar cycles. An example of the effect of cyclic precipitation is presented for the Powder River basin in Wyoming and Montana. A cycle of 22 years exhibits fluctuations of approximately 22 to 27% for precipitation and 38 to 50% for runoff. A more detailed study that investigates solar-forced precipitation cycles and their relationship to hydrologic processes is needed.
Book Synopsis The Role of the Sun in Climate Change by : Douglas V. Hoyt
Download or read book The Role of the Sun in Climate Change written by Douglas V. Hoyt and published by Oxford University Press on Demand. This book was released on 1997 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A successful blend of astronomical and climate studies with modern scientific and statistical analysis, this history of solar observations is followed by a review of how variations in solar brightness have been measured, both from the ground and space." --New Scientist
Book Synopsis Introduction to Solar Terrestrial Activity for Geomagnetic Studies by : Wallace Hall Campbell
Download or read book Introduction to Solar Terrestrial Activity for Geomagnetic Studies written by Wallace Hall Campbell and published by . This book was released on 1971 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this paper is to introduce the reader to the active sun as a source of disturbance that affect the magnetic field measured at the earth's surface. Included under this topic are the general sun's properties, solar surface activity centers and characteristics of the solar field and ejecta flowing into interplanetary space.
Book Synopsis Interplanetary Medium Data Book by : Joseph H. King
Download or read book Interplanetary Medium Data Book written by Joseph H. King and published by . This book was released on 1977 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Sun, the Solar Wind, and the Heliosphere by : Mari Paz Miralles
Download or read book The Sun, the Solar Wind, and the Heliosphere written by Mari Paz Miralles and published by Springer Science & Business Media. This book was released on 2011-01-06 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume represents the state of the art of the science covered by the International Association of Geomagnetism and Aeronomy (IAGA) Division IV: Solar Wind and Interplanetary Field. It contains a collection of contributions by top experts addressing and reviewing a variety of topics included under the umbrella of the division. It covers subjects that extend from the interior of the Sun to the heliopause, and from the study of physical processes in the Sun and the solar wind plasma to space weather forecasts. The book is organized in 6 parts: the solar interior, the solar atmosphere, the heliosphere, heliophysical processes, radio emissions, and coordinated science in the Sun-Earth system. In addition, we highlight some of the results presented during the IAGA Division IV symposia in the 11th Scientific Assembly of IAGA in Sopron, Hungary, on 23-30 August 2009, which was planned simultaneously with this book.
