Magma chamber deflation recorded by the Global Positioning System - The Hekla 1991 eruption

Details Magma chamber deflation recorded by the Global Positioning System - The Hekla 1991 eruption Magma chamber deflation recorded by the Global Positioning System - The Hekla 1991 eruption

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19.1483s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 19, no. 14, July 24, 1992, p. 1483-1486. Research supported by NSF, NATO, Na

Physics

25

Global Positioning System, Magma, Volcanoes, Geodesy, Iceland, Lava

Scientific paper

Between January 17 and March 11, 1991, 0.15 cu km of lava erupted initially from several radial fissures and subsequently from a single fissure on the SE flank of Hekla volcano, Iceland. Hekla is surrounded by an array of control points measured in 1989 using GPS geodesy and re-measured after the eruption. These measurements indicate that the eruption was associated with a surface deflation volume of 0.1 + 0.08 - 0.04 centered on Hekla (63.995 deg N +4 -3 km, 19.69 deg W +1.5 -2 km). The depth to the magma reservoir is 9 +6 -7 km, poorly constrained due to the absence of GPS control points close to the volcano.

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