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  • Society of Geomagnetism and Earth, Planetary and Space Sciences  (3)
  • 1980-1984  (3)
Sammlung
Verlag/Herausgeber
Erscheinungszeitraum
Jahr
  • 1
    Publikationsdatum: 1981-01-01
    Beschreibung: Using the data obtained from the IMS North American magnetometer network stations at high latitudes, a motion picture was made by a computer technique, describing time changes of Pc 5 and Pi 3 magnetic pulsation vectors. Examples of pulsation characteristics derived from this presentation are regional polarization changes including shifts of polarization demarcation lines, changes in the extent of an active region and its movement with time. © 1981, Society of Geomagnetism and Earth, Planetary and Space Sciences. All rights reserved.
    Print ISSN: 0022-1392
    Thema: Geologie und Paläontologie
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Publikationsdatum: 1982-01-01
    Beschreibung: A study of the data from the high-latitude North American IMS network of magnetic stations suggests that there is a component in substorm perturbations that corotates with the earth. It is as yet not certain whether the existence of this component stems from the corotation of a part of the magnetospheric plasma involved in the substorm mechanism or if it is a ‘phase change’ resulting from the control of the substorm manifestations by the earth's main magnetic field which is not axially symmetric. There are other geophysical phenomena showing a persistence of longitudinal variations corotating with the earth. These phenomena are of significance for a better understanding of ionosphere magnetosphere coupling. © 1982, Society of Geomagnetism and Earth, Planetary and Space Sciences. All rights reserved.
    Print ISSN: 0022-1392
    Thema: Geologie und Paläontologie
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 3
    Publikationsdatum: 1984-01-01
    Beschreibung: Photometric and interferometric observations of three SAR arc events, occurring on October 4/5,1980, May 8/9,1981 and October 20/21,1981, were made at the field station near Albany (42.68°N; 73.82°W), New York. The maximum intensities of these arcs are 0.49,0.70, and 2.0 kR, respectively. The peak emission altitude of the intense arc observed on the night of October 20/21, 1981, determined by the triangulation method, was 505 ± 46 km at the earlier stage of observation. The temperatures measured within the arc on October 4/5, 1980 are in the range of 1138°K to 1475°K, with an average value of 1349°K; while for the arc of May 8/9, 1981 they ranged from 1508°K to 1840°K, with an average value of 1697°K. For the arc of October 20/21,1981, temperatures are in the range of 1379°K to 1557°K, with an average value of 1472°K. The temperature enhancement within the arc is approximately 200°K for the arc observed on October 20/21, 1981, and 100°K for both the arcs observed on October 4/5, 1980 and on May 8/9, 1981. Our previous measurements on the arc of March 5/6,1981 also show a temperature enhancement of more than 200°K within the arc (Watanabe and Kim, 1982). These temperature enhancements clearly exceeded those predicted by a 2-dimensional model calculation. The present results also show that the temperature enhancement within the arc is strongly correlated with the overall maximum intensity of the arc. When the maximum intensity of the arc reaches about 400 R, the temperatures within the arc are variable (see Okano and Kim, 1979), but the temperature enhancement within the arc becomes almost always detectable. However, when the overall maximum intensity of the arc reaches about 2 kR, the temperature within the arc is quite stable and the temperature enhancement within the arc is quite substantial. © 1984, Society of Geomagnetism and Earth, Planetary and Space Sciences. All rights reserved.
    Print ISSN: 0022-1392
    Thema: Geologie und Paläontologie
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
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