Publication Date:
1984-01-01
Description:
Since 1978 the routine surveillance of La Soufrière volcano (Guadeloupe, F.W.I.) is performed using measurements of the total intensity (B) of the Earth magnetic field made at 3 stations radio-transmitted to the Fort Saint-Charles observatory. Differences AB between values of B measured at two of these stations and the one simultaneously measured at the third one (Matouba, the reference station) are computed; values of AB recorded around 2:00 a.m. are used to monitor the volcanomagnetic field. These 3 stations are installed in areas where (1) the reduction and projection errors are as weak as possible (2) the volcanomagnetic signal is expected to be noticeable during a volcanic crisis. The observations made using this network during the years 1979 to 1981 are presented. During these 3 years of no abnormal volcanic activity, the volcanomagnetic field, if any, remains below the experimental noise level. © 1984, Society of Geomagnetism and Earth, Planetary and Space Sciences. All rights reserved.
Print ISSN:
0022-1392
Topics:
Geosciences
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