Axial Seamount (E Pacific, 480 km west of Oregon): submarine eruption confirmed
Wed, 9 Sep 2015, 11:05 | BY: T
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.
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- Information about: Axial Seamount volcano
Previous news
Wed, 2 Sep 2015, 06:00
Axial Seamount volcano (Juan de Fuca Ridge) - Smithsonian / USGS Weekly Volcanic Activity Report for 2 September-8 September 2015 (New Activity / Unrest)
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. ... Read all
Wed, 29 Apr 2015, 06:00
Axial Seamount volcano (Juan de Fuca Ridge) - Smithsonian / USGS Weekly Volcanic Activity Report for 29 April-5 May 2015 (New Activity / Unrest)
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
