Showing papers by "IPG Photonics published in 1987"
TL;DR: In this paper, a magnetic network of telemetered stations is settled on the Montagne Pelee volcanic massif of the Martinique island, and the simultaneous variations in the differences of Earth's magnetic field intensity between two stations located on the volcano and a reference station which is 9km distant from them remain constant to within 1nT.
Abstract: Since 1985, a magnetic network of telemetered stations is settled on the Montagne Pelee volcanic massif of the Martinique island. Until December 1985, at which date the initial volcanic seisms are recorded, the simultaneous variations in the differences of Earth's magnetic field intensity between two stations located on the volcano and a reference station which is 9km distant from them remain constant to within 1nT. During the seismic crisis, which ends in May 1986, over twenty shallow earthquakes are sensed within 2km below the summit, and volcanomagnetic variations of small amplitudes never exceeding 3nT can be observed. The onset of the seismic crisis that occurred in December 1985-January 1986 is primarily expressed by a slow irreversible increase of the differences, whereas partly reversible volcanomagnetic variations are observed with the last seisms in May.
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