Readjustment of the Krafla spreading segment to crustal rifting measured by Satellite Radar Interferometry

Freysteinn Sigmundsson*, Hélène Vadon, Didier Massonnet

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

73 Citations (Scopus)

Abstract

Readjustment of the Krafla spreading segment on the Mid-Atlantic Ridge in Iceland, after a rifting episode from 1975 to 1984, is detected by radar interferometry. Crustal deformation from 1992 to 1995 is dominated by ∼ 24 mm/year subsidence above a shallow magma chamber at Krafla, superimposed on ∼ 7 mm/year along-axis subsidence of the spreading segment relative to its flanks. The deformation is caused by cooling contraction at ∼ 3 km depth and ductile flow of material away from the spreading axis, at a rate decreasing with time.

Original languageEnglish
Article number97GL01934
Pages (from-to)1843-1846
Number of pages4
JournalGeophysical Research Letters
Volume24
Issue number15
DOIs
Publication statusPublished - 1997

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