Etna was in eruption from the end of August until mid-October 1989. Activity built up progressively with an increase in strombolian activity at the summit, followed by episodic fire-fountaining and overflow of lava at the Southeast Crater until September 26th. The eruption culminated in the initiation of two subradial fractures oriented N040 and N160 between September 27th and October 2nd. The N040 fracture produced a lava flow into the Valle del Bove, active up to October 9th, whereas the N160 fracture produced no flows. A small geodetic network situated astride the N160 fracture at its southern end has enabled us to quantify the geometry of the fracture here. Several tiltmeters placed around the volcano have also provided a picture of the evolution of deformation with time. There is an abridged English version. -English summary
The 1989 September-October eruption of Mount Etna (Italy). Some quantitative information obtained by geodesy and tiltmetry
Nunnari G.;Puglisi G.;
1990-01-01
Abstract
Etna was in eruption from the end of August until mid-October 1989. Activity built up progressively with an increase in strombolian activity at the summit, followed by episodic fire-fountaining and overflow of lava at the Southeast Crater until September 26th. The eruption culminated in the initiation of two subradial fractures oriented N040 and N160 between September 27th and October 2nd. The N040 fracture produced a lava flow into the Valle del Bove, active up to October 9th, whereas the N160 fracture produced no flows. A small geodetic network situated astride the N160 fracture at its southern end has enabled us to quantify the geometry of the fracture here. Several tiltmeters placed around the volcano have also provided a picture of the evolution of deformation with time. There is an abridged English version. -English summaryI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
