AN INVESTIGATION OP MICROPULSATIONS IN THE EQUATORIAL REGION

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dc.contributor.authorADAH, MOSE S EGENE
dc.date.accessioned2014-06-23T11:05:10Z
dc.date.available2014-06-23T11:05:10Z
dc.date.issued1968-01
dc.descriptionTHESIS SUBMITTED BY MOSES EGENE ADAH, B.Sc. (A.B.U.) FOR THE SCIENCE DEGREE OF MASTER IN THE FACULTY OF SCIENCE AHMADU BELLO UNIVERSITY ZARIA. Department of Physics, January, 1968. Ahmadu Bello University, ZARIAen_US
dc.description.abstractAs an introduction to the thesis, an account is given of the previous observational studies of geomagnetic micropulsations at all latitudes but special attention is given to low latitude studies. Results obtained from both magnetic and earth current records are given in the survey. Reference is made to existing theories concerning the production of micropulsational phenomena, An account is given of the experimental methods for the study of micropulsations and the theory of the action of the high permeability core magnetometer, the type used in Zaria, is given in some detail. This is followed by the experimental particulars and the results of the analysis on pc 3, pc 4 and pi 2 band micropulsations obtained on the rapid-run magnetograms at Zaria for the months of July and August 1967. The. main r e s u l t s includes- (1) The dominant periodic times of pc 3 and pc 4 are (38 -+ 3) sec, and (60 -+ 5) sec, and that of pi 2 is (60 -+ 5) sec. (2) Pc 3 occurs at a l l local times with two peaks in occurrence; one in the morning and the other in the evening, the morning peak at about 06 hrs, (L,T) being more pronounced. Its peak amplitude is near local noon. (3) Pc 4 is essentially a daytime phenomenon with peak occurrence and amplitude near local noon, {4) Pi 2 is essentially a night time phenomenon with •peak occurrence between 22 and 23 hrs (LIT.) (5) Micropulsation activity is enhanced during magnetically disturbed periods and the amplitude is larger in the H than in the D component. (6) Pc 3, pc 4 and pi 2 micropulsations are linearly polarized along the magnetic meridian. The observed periods are compared with resonant periods predicted by some resonance theories for low latitudes. Also, the results obtained on pc 3, pc 4 and pi 2 band micropulsations are compared with those previously obtained at low latitudes.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/4972
dc.language.isoenen_US
dc.subjectINVESTIGATION,en_US
dc.subjectMICROPULSATIONS,en_US
dc.subjectEQUATORIAL REGIONen_US
dc.titleAN INVESTIGATION OP MICROPULSATIONS IN THE EQUATORIAL REGIONen_US
dc.typeThesisen_US
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