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Contribution to the study of the effects produced on the magnetic declination by the total solar eclipse of August 30, 1905

1907; Volume: 12; Issue: 1 Linguagem: Inglês

10.1029/te012i001p00015

2379-5697

Charles Nordmann,

Geomagnetism and Paleomagnetism Studies

Besides experiments relative to atmospheric electricity of which brief accounts have already been given elsewhere, 2 I obtained at Philippeville, Algiers, between August 14 and September 20, 1905, continuous registrations of variations of the magnetic declination and of. the horizontal intensity with the purpose of discovering a possible influence of the eclipse on the usual course of the diurnal variation of these elements. The instruments were installed under excellent conditions inside a casemate where the temperature and the hygrometric conditions were extremely constant, (the daily variation of the temperature there being less than 0.°1C.) The description of the apparatus, 3 as well as the details of the results relative to the absolute values of the magnetic elements at the place of observation and to their normal diurnal variation, will be presented in a memoir of the “Annales du Bureau des Longitudes” now in preparation. I will confine myself at present to giving some brief observations as to the results obtained on the day of the eclipse.