Magnetic measurements aboard a stratospheric balloon

Details Magnetic measurements aboard a stratospheric balloon Magnetic measurements aboard a stratospheric balloon

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pepi...44..348c&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 44, Issue 4, p. 348-357.

Physics

6

Scientific paper

We have measured the total intensity of the Earth's magnetic field above the western Mediterranean along a 2000 km profile, flown at an altitude of 40 km. A proton magnetometer was aboard a CNES (Centre National d'Etudes Spatiales) stratospheric balloon. The core field and transient external field contributions have been carefully determined and removed from the data. The resulting profile reveals significant anomalies of 10-20 nT amplitudes with 100-1200 km wavelengths. These anomalies have a clear crustal origin, and can be related to heterogeneities in magnetisation in the oceanic Algero-Provençal basin and to major faults of the Spanish continental crust. Comparison of our new data with previous data obtained over the same area, at about 1 km altitude (aeromagnetic surveys) and about 400 km altitude (MAGSAT), demonstrates the potential of stratospheric balloon measurements in bridging the 200-1500 km gap that exists in the knowledge of crustal anomalies, a gap that is unavoidable if only aeromagnetic and satellite-like MAGSAT-data are used.
This paper is from an international symposium on `Interpretation of Magnetic Anomalies from the Lower Crust' presented at the 5th General Assembly of the International Association of Geomagnetism and Aeronomie held at Prague in August 1985.

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