Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Cleft Segment
"Black Smoker" vents are active along the Cleft Segment, the southernmost of the Juan de Fuca Ridge. These sustained high-temperature vents were photographed along fissures that fed an older lava flow adjacent to a sea-floor lava flow that was emplaced in 1986 during the second of two documented submarine eruptions in the 1980s. The 80-km-long Cleft Segment is located immediately north of the Blanco Fracture Zone about 500 km off the Oregon coast. Image courtesy of National Oceanic and Atmospheric Administration (http://www.pmel.noaa.gov/vents/home.html).
Volcano Number:331030
Volcano Name:Cleft Segment
Country:Undersea Features
Volcano Type:Submarine
Last Eruption:1986 CE
Elevation:-2140m
Tectonic Setting:Rift zone / Oceanic crust (< 15 km)
Pop. within 5km:0
Pop. within 10km:0
Pop. within 30km:0
Pop. within 100km:0
Latitude:44.83
Longitude:-130.3



Eruption Data from the Global Volcanism Program of the Smithsonian Institution
Volcano Number Volcano Name Eruption Number Activity Type Explosivity Index Max Explosivity Index Modifier Activity Area Activity Unit Start Evidence Method Start Date End Date
331030 Cleft Segment 20714 Confirmed Eruption 0 S Cleft Segment, S Juan de Fuca Ridge Uranium-series -270
331030 Cleft Segment 20718 Confirmed Eruption 0 N Cleft Segment, S Juan de Fuca Ridge Historical Observations 1982/7/2
331030 Cleft Segment 20719 Confirmed Eruption 0 N Cleft Segment, S Juan de Fuca Ridge Historical Observations 1986/8/16
Emissions Data from the Global Volcanism Program of the Smithsonian Institution
Sorry. No emissions data found for this volcano.


Data from the Earthchem Library
Sorry. No data exist for this volcano in the EarthChem Library.
Data from the Earthchem Portal


Data from the SESAR Database


Data from the MaGa Database
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