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An submersed volcano off the West Coast of North America is showing telltale sign of an eruption , just as scientists had predicted . Motions of the seafloor , accompanied by a serial publication of quake , suggest a large amount of magma was free from the vent ’s caldera last calendar week . [ Readfull story ]
Axial Seamount
Axial Seamount , an undersea volcano located 300 mile ( 480 kilometers ) off the seashore of Oregon , seem to be erupting . Geologists Bill Chadwick , of NOAA ’s Pacific Marine Environmental Laboratory and Oregon State University , and Scott Nooner , of the University of North Carolina at Wilmington , betoken the eruption last class . ( simulacrum credit entry : Bill Chadwick , Oregon State University )
2011 eruption
The last time Axial erupted was in 2011 . researcher discovered the eruption by opportunity , while they were surveying the area for their instruments . ( Image acknowledgment : Bill Chadwick , Oregon State University , Copyright Woods Hole Oceanographic Institution )
Atop Juan de Fuca
Axial Seamount is an underwater sight that juts up 3,000 foot ( 900 meters ) from the ocean storey , and is part of a string of volcanoes that straddle the Juan De Fuca Ridge , a architectonic plate boundary where the seafloor is disperse apart . ( double credit : Bill Chadwick , Oregon State University )
Contents under pressure
The scientists monitored the seamount ’s body process by measure midget changes in H2O pressure due to apparent movement in the seafloor as the volcano inflates and deflates as magma motion in and out of the underlying chamber . A figure of these are instal on the volcano ’s caldera . ( Image quotation : NSF - OOI / UW / CSSF )
Glassy coating
After the 2011 bam , a level of glass formed atop the dark black flow ( right ) , as the lava , which is more than 2,000 degrees Fahrenheit ( 1,100 Celsius ) , came into liaison with the snug - to - freeze out brine . ( double deferred payment : NSF - OOI / UW / CSSF )
