Earth Sciences: Geomagnetism

Marine Magnetic and Bathymetric Profiles in the Gulf of California, 1967.

MAR 1969

Authors: Richard C. Lohner; NAVAL OCEANOGRAPHIC OFFICE WASHINGTON D C

The full text of this report is not available and therefore is not for sale. This information is provided for reference purposes only.

Marine magnetic and bathymetric data were recorded over 2300 nautical miles in the Gulf of California by the USNS Charles H. Davis (T-AGOR 5). These records, presented in profile form, reveal several distinctive magnetic features. The geological significance of these features is discussed. (Author)

THE MIDDLE-LATITUDE F REGION DURING SOME SEVERE IONOSPHERIC STORMS,

11 FEB 1969

Authors: R. B. Norton; AERONOMY LAB BOULDER COLO

Topside ionograms taken during some severe ionospheric storms show F2-layer critical frequencies that are less than F1-layer critical frequencies. A comparison of the electron density profiles derived from Alouette 1 ionograms obtained during these disturbed periods with those obtained during undisturbed periods show that the height of the F2 layer moves up, the plasma scale height above the F2 peak increases, and the column electron content up to 1000 km ...

CONFIRMATION OF PREDICTION OF GEOMAGNETIC SECULAR CHANGE,

FEB 1969

Authors: Anne B. Kahle; R. H. Ball; J. C. Cain; RAND CORP SANTA MONICA CALIF

In two recent papers it was shown that a strong (0.93) correlation exists between the change in the length of day and the change in westward velocity of the eccentric dipole or 'magnetic center' of the geomagnetic field. The correlation is presumed to be due to the necessity to conserve angular momentum of the earth. If one assumes that the motion of the eccentric dipole is related to a motion ...

GRAVITY DATA OBTAINED DURING CHAIN CRUISE NO. 70.

FEB 1969

Authors: Carl Bowin; Thomas C. Aldrich; WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS

Profiles, tabulations, and charts are presented of principal gravity facts, free-air gravity anomalies, and simple Bouguer gravity anomalies obtained in the western North Atlantic Ocean during R/V CHAIN cruise 70. (Author)

A POSSIBLE FULL-MOON ENHANCEMENT OF HYDROMAGNETIC EMISSION ACTIVITY,

23 JAN 1969

Authors: A. C. Fraser-Smith; LOCKHEED MISSILES AND SPACE CO PALO ALTO CALIF LOCKHEED RESEARCH LAB

Micropulsation records obtained at California stations during a 6-year period, from August 1, 1960, to July 30, 1966, have been analyzed for a possible full-moon effect on hydromagnetic (hm) emission activity. The data, which had previously been digitized into the form of a daily hm emission activity index W, were considered in both their original form and then according to several selection criteria. In all cases there was an indication ...

DEVELOPMENT OF AN ELECTRONIC SYSTEM FOR PROCESSING VARIABLE-AREA MAGNETOGRAMS.

14 JAN 1969

Authors: Robert L. Waters; John D. Osburn; Fred J. Morris; ELECTRO-MECHANICS CO AUSTIN TEX

This program was the continuation of a developmental effort in the handling and processing of recorded earth's magnetic field data. The desired output was intended to facilitate analysis of the solar-terrestrial relationships governing high magnetic activity in the earth's magnetic field associated with degraded electromagnetic propagation. The technical program described emphasizes the processing of magnetograms and the modifications to the electronic system developed for scanning and digitizing the film records. ...

TABLES OF INTEGRALS FOR THE SPHERICAL HARMONIC EXPANSION OF THE HYDROMAGNETIC EQUATIONS.

JAN 1969

Authors: Keith Leon McDonald; Charles O. Stearns; EARTH SCIENCES LABS BOULDER COLO

The method of spherical harmonic expansion of the hydromagnetic equations for incompressible media involves two well-known integral forms that are evaluated by standard numerical integration methods. The results are tabulated to 10 significant figure accuracy for all sets of principal integers inclusive of an 8th-degree harmonic analysis. Extension to compressible media introduces two further surface integral forms that are each simply evaluated in terms of a finite sum of products ...

MAGNETO-TELLURIC DEEP EARTH RESISTIVITY AT EIGHT U. S. TYPE-LOCATIONS.

JAN 1969

Authors: K. Vozoff; A. S. Orange; H. S. Lahman; GEOSCIENCE INC CAMBRIDGE MASS

Magneto-Telluric measurements were carried out in eight 'type-areas' of the U. S., to see whether systematic differences exist in their deep crustal and upper mantle electrical resistivities. Digital recording, electrode spacings of tens of kilometers, and a frequency range of five decades were used at most locations. Results varied between those of the Adirondacks, where a resistive crust overlies a moderately conductive, strongly anisotropic mantle, to the thin resistive crust ...

GEOPHYSICS AND SPACE DATA BULLETIN, VOLUME VI, NUMBER I, FIRST QUARTER-1969,

1969

Authors: Anne L. Carrigan; AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Contents: Total field intensity magnetometer; Cosmic ray neutron intensity monitor; Extremely low frequency noise; Riometer; Solar optical patrol observations; Solar radio emission; Vertical incidence ionospheric soundings.

GEOPHYSICS AND SPACE DATA BULLETIN. VOLUME VI, NUMBER 2. SECOND QUARTER 1969,

1969

Authors: Anne L. Carrigan; AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

GEOPHYSICS AND SPACE DATA BULLETIN, VOLUME VI, NUMBER 3. THIRD QUARTER 1969,

1969

Authors: Anne L. Carrigan; AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

GEOPHYSICS AND SPACE DATA BULLETIN. VOLUME VI, NUMBER 4, FOURTH QUARTER 1969,

1969

Authors: Anne L. Carrigan; AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

THREE WAYS TO TREAT THE IGRF ON THE EARTH'S SURFACE,

OCT 1968

Authors: Anne B. Kahle; RAND CORP SANTA MONICA CALIF

When an International Geomagnetic Reference Field (IGRF) is adopted in the already agreed upon form based on geocentric coordinates, the problem will arise as to how to represent and use the IGRF on the Earth's surface. The most straightforward and accurate method is to synthesize the values of the field, using the correction factors for the spheroidal shape of the earth. However, some workers may wish to avoid these correction ...

VARIATIONS IN THE GEOMAGNETIC FIELD AND IN THE RATE OF THE EARTH'S ROTATION,

OCT 1968

Authors: R. H. Ball; Anne B. Kahle; E. H. Vestine; RAND CORP SANTA MONICA CALIF

Vestine and Kahle, in a previous paper, found a strong correlation between motion of the geomagnetic eccentric dipole and changes in the earth's rotation rate, as inferred from astronomical data. This correlation suggested that the irregular change in length of day was compensated by a change in angular momentum of the outer core which is related to the eccentric dipole motion. New data are used to improve these curves, and ...

RESEARCH IN THE DESIGN, DEVELOPMENT AND CONSTRUCTION OF NON-MAGNETIC SENSORS FOR MAGNETIC FIELD-CHARGED PARTICLE CORRELATION STUDIES.

OCT 1968

Authors: Bach Sellers; Frederick A. Hanser; Jean Luc Hunerwadel; PANAMETRICS INC WALTHAM MASS

The results reported can be divided into three areas: (1) Design, construction and flight on a Javelin rocket of a 'first generation' charged particle detection system, for (a) protons with energy between 0.45 MeV and 1.7 MeV, and (b) electrons between 25 keV and 200 keV. (2) Design and construction of a magnetometer range expander. (3) Design and construction for a Niros rocket of a 'second generation' charged particle detection ...

DOPPLER OBSERVATIONS OF ASSOCIATED IONOSPHERIC AND MAGNETIC FLUCTUATIONS,

14 AUG 1968

Authors: G. M. Boyd; H. J. Duffus; ROYAL ROADS MILITARY COLL VICTORIA (BRITISH COLUMBIA)

Observations of ionospheric motions associated with magnetic micropulsations were conducted during a three-year period. Current theoretical models of the interaction indicate that observable Doppler shifts of high-frequency radio waves coherently reflected from the ionosphere should accompany all reasonably large geomagnetic disturbances, and vice versa, but this is not observed. Detailed studies of particular classes of events were therefore undertaken, involving spectral analyses, cross correlations, diurnal and seasonal occurrence statistics, and ...

APPLICATION OF OPTICAL PUMPING TECHNIQUES TO STUDIES OF GEOMAGNETIC GRADIENTS. THE PARTICULAR CASE OF 'SEASIDE' EFFECT.

12 AUG 1968

Authors: Jean Mosnier; VOLT TECHNICAL CORP LANHAM MD

ASYMMETRY IN GEOMAGNETIC RESPONSE TO THE POLARITY OF THE INTERPLANETARY MAGNETIC FIELD.

15 JUL 1968

Authors: John M. Wilcox; CALIFORNIA UNIV BERKELEY SPACE SCIENCES LAB

The difference between northern and southern hemispheric geomagnetic activity is investigated as a function of the sector polarity pattern of the interplanetary magnetic field. It is found for the year 1964 that sectors with field directed away from the sun are associated with slightly enhanced northern hemisphere activity, and toward sectors are associated with slightly enhanced southern hemisphere activity. (Author)

VLF EMISSIONS DURING MAGNETIC STORMS AND THEIR ASSOCIATION WITH 40 keV ELECTRONS,

JUL 1968

Authors: David P. Cauffman; Donald A. Gurnett; IOWA UNIV IOWA CITY DEPT OF PHYSICS AND ASTRONOMY

Spectrograms of very low frequency radio noise recorded by University of Iowa satellite Injun 3 at invariant latitudes greater than 50N are used to determine the behavior of VLF emissions during magnetic storms. Variations in the wideband intensity of VLF emissions from L = 3 to L = 8 are studied for the period from 28 April to 28 August 1963 by means of the automatic gain control levels of ...

COMPARISON OF TWO METHODS FOR THE COMBINATION OF SATELLITE AND GRAVIMETRIC DATA.

JUL 1968

Authors: Richard H. Rapp; OHIO STATE UNIV COLUMBUS DEPT OF GEODETIC SCIENCE

One method for the combination of satellite and gravimetric data consists of a comparison of a potential coefficient found by satellite analysis with the coefficient found by the usual summation process applied to a global estimate of a terrestrial anomaly field. A second method compares an anomaly computed from a set of potential coefficients found from satellite analysis with the observed terrestrial estimate. The specific equations for the adjustment procedure ...

CONVERSION, MAINTENANCE, AND UPDATING OF MAGNETOGRAPH DATA FILES.

JUL 1968

Authors: Helen L. Roehrig; AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

This paper describes the analysis and design required to develop a system of computer programs to implement a changeover from punched cards to magnetic tape for the permanent storage of varying-area film magnetograph data. Instead of three sets of biweekly magnetographs stored in a punch card deck, all biweekly magnetographs for one station are stored on a reel of magnetic tape. The system is designed to process one reel of ...

THE RADIALLY VIBRATING ROTATING GRAVITATIONAL GRADIENT SENSOR,

JUN 1968

Authors: Vladimir Chobotov; AEROSPACE CORP EL SEGUNDO CALIF EL SEGUNDO TECHNICAL OPERATIONS

The concept and operating characteristics of a radially vibrating gravitational gradient sensor are presented. The sensor is a tuned mechanical oscillator that responds to gravity-gradient forces when it is rotated in a stationary gravitational field. Because of the inherent dynamic magnification resulting from resonant or near resonant operation of the sensor it obtains high sensitivity and can potentially be used as an accurate attitude control sensor, an orbital altimeter, or ...

A STUDY OF ATMOSPHERIC HEATING APPLIED TO THE PHENOMENON OF GEOMAGNETIC HEATING,

JUN 1968

Authors: G. E. Thomas; B. K. Ching; AEROSPACE CORP EL SEGUNDO CALIF EL SEGUNDO TECHNICAL OPERATIONS

The well-known impulsive increase in satellite drag acceleration accompanying world-wide geomagnetic activity is interpreted to be the consequence of heating and expansion of the neutral upper atmospheric gas. For an assumed one-dimensional heating that is not attached to the geomagnetic field lines, the dominant mode of heat transport is molecular heat conduction above about 100 km. Using approximate analytic Green's functions for the temperature on isobaric surfaces, one can determine ...

A ROCKET-BORNE FLUX-GATE MAGNETOMETER.

JUN 1968

Authors: Palmer Dyal; R. T. Johnson Jr; AIR FORCE WEAPONS LAB KIRTLAND AFB NM

The magnetometer used in the payload of the DASA Project 6.27 Blue Goose Rocket is described. The instrument, a triaxial logarithmic second harmonic (flux-gate) magnetometer, measures three orthogonal components of magnetic fields in the range from 100 to 100,000 gamma. Included herein are the theory of the measurement, a description of the sensor and electronics, and the calibration of the instrumentation before integration into the payload. The details of the ...

OCEANOGRAPHIC SURVEYS, FISCAL YEAR 1967.

JUN 1968

Authors: NAVAL OCEANOGRAPHIC OFFICE NSTL STATION MS OCEANOGRAPHIC SURVEYS DEPT

The document covers unclassified oceanographic surveys done by or contracted for the U.S. Naval Oceanographic Office during the period 1 July 1966 through 30 June 1967. The report is outlined by projects with a brief description of the project, the surveys conducted, and the work accomplished on the surveys. (Author)

AN EVALUATION OF THE 1965.0 EPOCH, H. O. 1706 WORLD MAGNETIC VARIATION CHART.

JUN 1968

Authors: Donald W. Hill; NAVAL OCEANOGRAPHIC OFFICE NSTL STATION MS

An evaluation of the 1965.0 epoch, H. O. 1706 World Magnetic Variation Chart is performed by direct comparison of charted and observed values. Results of this study provide an estimate of chart reliability based on the correlation of the computed spherical harmonic surface and individual field data values. (Author)

SOME NOTES ON GEOPHYSICS IN THE NETHERLANDS.

06 MAY 1968

Authors: Morton L. Barad; OFFICE OF NAVAL RESEARCH LONDON (UNITED KINGDOM)

This report is a summary of information gathered during a visit to the Royal Dutch Meteorological Institute in late March of 1968. It deals mainly with the Institute's research programs in meteorology; seismology, geomagnetism, and ionospheric studies; and oceanography. It also includes a presentation of the program of education for geophysicists at the University of Utrecht. (Author)

THE TRANSMISSION OF GEOMAGNETIC DISTURBANCES.

MAY 1968

Authors: John A. Jacobs; BRITISH COLUMBIA UNIV VANCOUVER INST OF EARTH AND PLANETARY SCIENCES

The research has been mainly concerned with a theoretical investigation of geomagnetic disturbances. The chief interest has been geomagnetic micropulsations with periods from a few minutes down to a fraction of a second. Particular attention has been paid to those of irregular type and to hydromagnetic emissions (regular pulsations with periods around one second). A permanent field station has been in operation for more than 5 years - from June ...

OBSERVATIONS OF ENERGETIC ELECTRONS AT SYNCHRONOUS ALTITUDE. VOLUME I. GENERAL FEATURES AND DIURNAL VARIATIONS,

MAY 1968

Authors: George A. Paulikas; J. Bernard Blake; Stanley C. Freden; Sam S. Imamoto; AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Energetic electron fluxes above four integral thresholds (E sub e greater than 300 keV, greater than 450 keV, 1.05 MeV, and 1.9 MeV) were measured at synchronous altitude (R = 6.6 R sub e) during the first half of 1967 on board the ATS-1 satellite (1966-110A). The fluxes show a diurnal variation, with the noon-to-midnight ratio being larger for the more energetic electron groups and being larger, on the average, ...

RELATIONSHIP BETWEEN LOCAL GRAVITY ANOMALIES AND THE DERIVATIVES OF THE POTENTIAL. COMPUTATION OF VERTICAL GRADIENT OF GRAVITY FROM A KNOWN DISTRIBUTION OF GRAVITY ANOMALIES ON A SURFACE OF ANY SHAPE,

APR 1968

Authors: B. V. Numerov; O. M. Raspopov; DIRECTORATE OF SCIENTIFIC INFORMATION SERVICES OTTAWA (ONTARIO)

THE RESULTS OF THE FIRST DECADE OF SOVIET ANTARCTIC RESEARCH. THE ELEVENTH SOVIET ANTARCTIC EXPEDITION,

15 MAR 1968

Authors: V. G. Averyanov; L. I. Eskin; DEPARTMENT OF THE NAVY WASHINGTON D C

The Leningrad polar explorers -- geographers, geologists, geophysicists, biologists, and climatologists -- met in a general assembly to discuss scientific research in Antarctic regions. Scientists attending the conference gave results of research in varied fields of science conducted by them during the Antarctic expeditions. (Author)

PROSPECTS OF GEOLOGICAL INVESTIGATIONS IN THE ANTARCTIC IN 1960-1965,

07 MAR 1968

Authors: M. G. Ravich; DEPARTMENT OF THE NAVY WASHINGTON D C

During the past three years Soviet geologists have carried out an exploratory survey of individual territories along the coast of Eastern Antarctica. Only brief reconnaissances were carried out at the majority of locations and area-wide geological surveys. (Author)

RESULTS OF GEOPHYSICAL INVESTIGATIONS OF THE STRUCTURE OF THE EARTH'S CRUST IN ANTARCTICA,

07 MAR 1968

Authors: S. A. Ushakov; DEPARTMENT OF THE NAVY WASHINGTON D C

The report presents the results of investigations of the structure of the earth's crust in Antarctica. Conclusions have been drawn principally on the basis of gravimetric data. (Author)

A SYSTEM FOR AUTOMATIC COLLECTION AND PROCESSING OF GEOMAGNETIC DATA IN DIGITAL FORM.

04 MAR 1968

Authors: Georg Gustafsson; Sonia Nilsson; KIRUNA GEOPHYSICAL OBSERVATORY (SWEDEN)

An automatic digital data recording and reduction for geomagnetic standard observations has been made. The system collects automatically all data necessary for reduction of the magnetovariograph values on punched tape, and the reduction is done by a computer which computes and prints all tables of the yearly data publication. Circuit diagrams of the equipment are given. The computer program for the reduction of the data has been included together with ...

ELECTRON CONTENT FLUCTUATIONS ASSOCIATED WITH A MAGNETIC STORM COMMENCING ON MAY 25, 1967.

MAR 1968

Authors: John M. Goodman; Melvin W. Lehman; Edward Piernik; NAVAL RESEARCH LAB WASHINGTON D C

VHF transmissions (137.350 MHz) from geostationary satellite ATS-1 (1966 110A) have been analyzed to determine the fluctuations in ionospheric electron content associated with magnetic storm No. 122 which began on May 25 (0735 EST) and ended on May 27 (0100 EST). Coincident with the advent of extremely disturbed propagation conditions in the HF band was an estimated increase in the ionospheric electron content of approximately 100 percent which occurred over ...

MAGNETOSPHERIC PARAMETERS DETERMINED FROM STRUCTURED MICROPULSATIONS,

MAR 1968

Authors: J. F. Kenney; H. B. Kraflich; H. B. Liemohn; BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH

The structured elements in Pc 1 and Pi 1 events display characteristics of multihop and halfhop ULF whistlers respectively. Analysis of these events which is carried out for different magnetic field and plasma distribution models yields useful information about the source and propagation of these micropulsations as well as information about the magnetospheric plasma distribution. The Pc 1 propagation zone is centered about 75 degrees geomagnetic latitude on the sunlit ...

THE MAGNETIC FIELD AND ENERGY OF AN AXISYMMETRIC VAN ALLEN BELT,

23 FEB 1968

Authors: S. Chapman; P. C. Kendall; P. N. Swartztrauber; D. W. Windle; SHEFFIELD UNIV (ENGLAND) DEPT OF APPLIED MATHEMATICS AND COMPUTING SCIENCE

In an earlier paper the magnetic vector potential of an axisymmetric distribution of azimuthal electric currents was expanded in a Legendre series. It was shown that the method may be used to study the magnetic field of a geomagnetic ring current of charged particles spiralling in a dipole field. The purpose of this further work is to determine the self magnetic energy for various model ring current belts. The pitch ...

STUDY OF TECHNIQUES FOR GEOMAGNETIC FIELD MEASURING, RECORDING AND AUTOMATIC RECORD DIGITIZING.

15 FEB 1968

Authors: Robert L. Waters; Fred J. Morris; ELECTRO-MECHANICS CO AUSTIN TX

The goals of the program were all related to magnetic measurements and recording, and to the processing of geomagnetic data. A study of feasibility of a Variable-Mu Gradiometer, construction of a prototype Variable-Area Recorder, and further improvements to and operation of the DADA-MAGSCAN automatic magnetogram processing system, are described. 'A Feasibility Study of a Component Gradiometer (U),' Scientific Report 1, Part I (U) and Part II (S), 14 May 1967, ...

STRUCTURE OF THE EARTH'S CRUST IN THE ARCTIC.

FEB 1968

Authors: R. M. Demenitskaya; AERONAUTICAL CHART AND INFORMATION CENTER ST LOUIS MO LINGUISTIC SECTION

This translation is a study of the crustal structure in the Arctic, based on seismic, aeromagnetic and bathymetric observations in recent years. Seismic evidence indicates an extensive development of a two layered structure of sedimentary complex and an abrupt change of the thickness of deposits in the Arctic basin. This suggests recent intensive tectonic movements. A new map of submarine ridge axis is presented, showing the position of a new ...

OCEANOGRAPHIC RESEARCH AT M.I.T. IN THE DEPARTMENT OF GEOLOGY AND GEOPHYSICS AND THE DEPARTMENT OF METEOROLOGY.

FEB 1968

Authors: Shawn Biehler; Dayton E. Carritt; Delbar P. Keily; H. Thomas Rossby; M. Gene Simmons; MASSACHUSETTS INST OF TECH CAMBRIDGE

The progress report covers research in oceanography at M.I.T. by several professors and students under the sponsorship of the Office of Naval Research in the following areas: Heat flow; gravity; magnetics; seismic; magnitude of gravity; vibrating string accelerometer; atmospheric chemistry; sea-air interaction; marine aerosols; trace gaseous constituents; oceanic particulates; light scattering; ocean currents; horizontal velocity; inertial system; ocean currents; neutrally buoyant floats; permanent sound channel; internal waves. (Author)

ON THE KERATOPHYRE-SPILITIC FORMATION OF THE SOUTH-YENISEY MOUNTAIN RIDGE AND THE POSSIBLE NATURE OF THE KASSKAYA MAGNETIC ANOMALY.

FEB 1968

Authors: E. B. Nalivkina; AERONAUTICAL CHART AND INFORMATION CENTER ST LOUIS MO LINGUISTIC SECTION

The translation is of a work which drew the following conclusions: (1) The Yenisey metamorphic complex, or at any rate a considerable part of it, represents a metamorphized keratophyre-spilitic formation. (2) Ferrour quartzites are spatially and genetically connected with similar Pre-Cambrian formations of the world. (3) Rocks of the keratophyre-spilitic formation of Southern Yenisey ridge subside in a northwestern direction. These formations and higher horizons of the above-indicated formation obviously ...

EVALUATION OF THE ACCURACY OF GRAVIMETRIC MAPS.

FEB 1968

Authors: M. V. Avdulov; AERONAUTICAL CHART AND INFORMATION CENTER ST LOUIS MO LINGUISTIC SECTION

The accuracy of a map of gravity anomalies is understood to be the error in the determination of the anomaly at any point of the map, selected at random. The accuracy of a gravimetric map is determined by the error in the computations of the anomaly at the points of measurement and by the density of distribution of these points. This translation is a detailed analyzation of the problem of ...

DETERMINATION OF THE COMPOSITION OF ROCKS OF THE PALEOZOIC BASEMENT ACCORDING TO CHARACTERISTIC PECULIARITIES OF THE ANOMALOUS MAGNETIC FIELD.

FEB 1968

Authors: A. V. Glazunova; AERONAUTICAL CHART AND INFORMATION CENTER ST LOUIS MO LINGUISTIC SECTION

The translation discusses at length, and shows with graphs and charts, the comparison of results of the aeromagnetic survey with drilling data. It is indicated that aeromagnetic investigations are effective in determining the material composition of rocks of the Paleozoic basement in a geologically closed area. The conclusions drawn from this work are as indicated: (1) Determination of the basement rocks should be carried out on the basis of physical ...

TWO MAGNETIC AND BATHYMETRIC PROFILES ACROSS THE ATLANTIC OCEAN AND THE MID-ATLANTIC RIDGE.

FEB 1968

Authors: J. Brakl; COLUMBIA UNIV DOBBS FERRY N Y HUDSON LABS

The bathymetric and geomagnetic results of two North Atlantic crossings between Bermuda and Rota, Spain and Puerto Rico and Dakar are presented and discussed. (Author)

NATIONAL REPORT OF THE SOVIET COMMITTEE ON GEOPHYSICS IN CONNECTION WITH THE 'INTERNATIONAL YEAR OF THE QUIET SUN' DURING THE PERIOD 1964-1966.

23 JAN 1968

Authors: FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

In the period 1964-1966 the USSR carried out studies on all aspects of the program of the IYQS: (1) universal days; (2) meteorology; (3) geomagnetism; (4) polar aurorae and luminescence of the sky; (5) the ionosphere and meteors; (6) solar activity; (7) cosmic rays; (8) investigations of cosmic space. Below we present brief data on the execution of the observation program and on preliminary scientific results with respect to the ...

RESEARCH DIRECTED TOWARD THE COLLECTION, REDUCTION AND EVALUATION OF GEOMAGNETIC FIELD DATA.

05 JAN 1968

Authors: John F. Devane; John E. Hogan; BOSTON COLL CHESTNUT HILL MASS

The operation of the Weston Geomagnetic Observatory is described. Brief descriptions are given of the Weston Index of magnetic activity, and of projects on the quiet day variation, telluric current and micropulsation recording. The support of the Air Force program of geomagnetic field measurement by rockets is described. This includes a detailed description of the process whereby taped data from rocket flights is processed. Results of theoretical investigations of geomagnetic ...

FINE-SCALE TOPOGRAPHY AND MAGNETIC ANOMALIES OF THE DEEP SEA FLOOR OFF SOUTHERN CALIFORNIA.

03 JAN 1968

Authors: Michael S. Loughridge; SCRIPPS INSTITUTION OF OCEANOGRAPHY SAN DIEGO CALIF MARINE PHYSICAL LAB

The first survey of a portion of the Pacific sea floor by means of deeply towed instruments was made in July 1965. The area surveyed off California near 123 deg 10 min W and 32 deg 40 min N was previously thought to be one of typical abyssal hills at a depth of approximately 4000 meters. Observations of the fine-scale topography and total magnetic field intensity were made with a ...

BOUNDARY OF ENERGETIC ELECTRONS DURING THE JANUARY 13-14, 1967 MAGNETIC STORM.

JAN 1968

Authors: George A. Paulikas; J. Bernard Blake; Stanley C. Freden; Sam S. Imamoto; AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Measurements of energetic electron fluxes were made aboard the synchronous satellite ATS-1 (1966-110A) during the magnetic storm of January 13-14, 1967. Between 0007 and about 0105 UT (approximately 1400-1500 local time) on January 14, the electron fluxes dropped to background levels in a manner which when associated with the onboard magnetometer data suggests that the boundary of the magnetosphere was compressed to less than 6.6 Re on the day side ...

VAN NORMAN LAKE MAGNETOMETER FACILITY,

JAN 1968

Authors: Wallace B. Harbridge; Donald A. McPherson; AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

The report discusses the design and operation of a triaxial magnetometer facility developed for the Aerospace Corporation solar observatory at Van Norman Lake, California. Magnetometer sensors and associated electronics measure three components of the geomagnetic field. Fluctuations of the field (plus or minus 100 gamma) are recorded on a continuous basis at a recorder sensitivity of 2 gamma/mm. (Author)

GEOPHYSICS AND SPACE DATA BULLETIN, VOLUME V, NUMBER 1, FIRST QUARTER 1968,

1968

Authors: Anne L. Carrigan; Norman J. Oliver; AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

AFCRL contract and inhouse data reported from stations throughout the world are tabulated. The following types of data are included: Total field intensity magnetometer; Cosmic ray neutron intensity monitor; Extremely low frequency noise; Riometer; Solar optical patrol observations; Solar radio emission; Vertical incidence ionospheric soundings; Cumulative index for data published in Geophysics and Space Data Bulletin.