Geomagnetic storm sudden commencements and their possible sources at the sun
نویسندگان
چکیده
منابع مشابه
Signatures of storm sudden commencements in geomagnetic H, Y and Z ®elds at Indian observatories during 1958±1992
The work describes an intensive study of storm sudden commencement (SSC) impulses in horizontal (H), eastward (Y) and vertical (Z) ®elds at four Indian geomagnetic observatories between 1958±1992. The midday maximum of DH has been shown to exist even at the low-latitude station Alibag which is outside the equatorial electrojet belt, suggesting that SSC is associated with an eastward electric ®e...
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A list of a series of 2462 ssc's was made by studying the 100-year magnetic records in two antipodal subauroral observatories and in one low-latltude observatory. Various statistical' results are set forth. The negative correlation between ssc amplitude and ri'se time postulated by Desster et al. (1960) seems to be true for the more rapid ssc's (1-4 min). Yearly numbers of ssc's are much better...
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The geomagnetic horizontal (H) ®eld from the chain of nine observatories in India are used to study the storm-time and disturbance daily variations. The peak decrease in storm-time variation in H showed signi®cant enhancements at the equatorial electrojet stations over and above the normally expected decrease due to the ring current eects corrected for geomagnetic latitudes. The disturbance da...
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the subjects of the study are only the tefl teachers and students at gilan university. to obtain the desired data, a questionnaire which was based on the theories and disecussions gathered, was used as the main data gathering instrument. to determine the degree of relationship between variables, covariance and pearson product moment correlation coefficient were the formulas applied. the data we...
15 صفحه اولA Historical Review of the Geomagnetic Storm-Producing Plasma Flows from the Sun
The concept of geomagnetic storm-producing solar plasma flows has evolved and advanced considerably over the last 100 years or so. This particular field of study began in an effort to understand geomagnetic disturbances and the aurora. The purpose of this paper is try to follow the ways in which early concepts evolved to later ones, not to review each concept in detail. It is fascinating to see...
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ژورنال
عنوان ژورنال: Geofísica Internacional
سال: 1991
ISSN: 0016-7169
DOI: 10.22201/igeof.00167169p.1991.30.1.946