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Axial Seamount volcano (Juan de Fuca Ridge) - Smithsonian / USGS Weekly Volcanic Activity Report for 2 September-8 September 2015 (New Activity / Unrest)

Wed, 2 Sep 2015, 06:00
06:00 AM | BY: VN
An eruption at Axial Seamount, inferred to have started at 2230 on 23 April with an earthquake swarm, was confirmed during 14-29 August by bathymetric data and observations made during a ROV Jason dive. Two large lava flows from the N rift zone (8-16 km N of the summit caldera) were at most 127 m thick; some of the thicker areas had drained collapse features indicating they had molten interiors when emplaced. The ROV traversed the flows for about 2 km.
New, thinner lava flows were also identified in the NE summit caldera and on the NE rim.

Source: Oregon State University's Marine Science Center and NOAA/PMEL EOI Program
From: Global Volcanism Program, 2015. Report on Axial Seamount. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 2 September-8 September 2015. Smithsonian Institution and US Geological Survey.

Previous news

Wed, 29 Apr 2015, 06:00
Geologists reported that starting at 2230 on 23 April thousands of small earthquakes were detected at the Axial Seamount, and then the seafloor dropped by 2.4 m over a three-day period. It was unclear if the earthquakes and deflation meant an eruption or a large intrusion of magma that did not reach the surface. ... Read all
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