Ground deformation near Gada `Ale volcano, Afar, observed by radar interferometry

Details Ground deformation near Gada `Ale volcano, Afar, observed by radar interferometry Ground deformation near Gada `Ale volcano, Afar, observed by radar interferometry

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27.3093a&link_type=abstract

Geophysical Research Letters, Volume 27, Issue 19, p. 3093-3096

Mathematics

Logic

7

Geodesy And Gravity: Crustal Movements-Intraplate, Volcanology: General Or Miscellaneous

Scientific paper

Radar interferometric measurements of ground-surface displacement using ERS data show a change in radar range, corresponding to up to 12 cm of subsidence near Gada `Ale volcano in northern Afar, Ethiopia, that occurred between June 1993 and May 1996. This is the area of lowest topography within the Danakil Depression(-126 m). Geodetic inverse modeling and geological evidence suggest a volcanic origin of the observed deformation; it was probably caused by a combined process of magma withdrawal form a larger reservoir and normal faulting. There is no evidence of subaerial eruption. This is the only identifiable deformation event during June 1993-October 1997 in the 80 km long Erta `Ale volcanic range, indicating surprising inactivity elsewhere in the range.

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