CoAxial Segment

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  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 46.52°N
  • 129.58°W

  • -2400 m
    -7872 ft

  • 331020
  • Latitude
  • Longitude

  • Summit

  • Volcano

There are no activity reports for CoAxial Segment.

 Available Weekly Reports

There are no Weekly Reports available for CoAxial Segment.

Summary of eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1993 Jun 26 1993 Jul 4 (?) Confirmed 0 Historical Observations N end CoAxial segment, Juan de Fuca Ridge
1986 ± 5 years Unknown Confirmed 0 Historical Observations CoAxial segment, Juan de Fuca Ridge

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.

Carbotte S M, Detrick R S, Harding A, Canales J P, Babcock J, Kent G, Van Ark E, Nedimovic M, Diebold J, 2006. Rift topography linked to magmatism at the intermediate spreading Juan de Fuca Ridge. Geology, 34: 299-212.

Chadwick W W Jr, Embley R W, Fox C G, 1995. SeaBeam depth changes associated with recent lava flows, CoAxial segment, Juan de Fuca Ridge: evidence for multiple eruptions between 1981-1993. Geophys Res Lett, 22: 167-170.

Rhodes J M, Morgan C, Liias R A, 1990. Geochemistry of Axial Seamount lavas: magmatic relationship between Cobb Hotspot and the Juan de Fuca Ridge. J Geophys Res, 95: 12,713-12,733.

Smithsonian Institution-GVN, 1990-. [Monthly event reports]. Bull Global Volc Network, v 15-33.

The CoAxial segment of the Juan de Fuca Ridge is located about 435 km west of the Oregon coast, NE of Axial volcano. A submarine eruption along the CoAxial segment that produced thermal plumes and a new lava flow was detected by acoustic hydrophones in June 1993, just days after installation of the hydrophone system. This marked the first deep-sea volcanic eruption that was detected as it was happening. The location of the eruption was at a depth of about 2400 m, about 37 km NE of Axial volcano. Bathymetric surveys indicated that one or more additional sea-floor lava extrusions took place immediately to the east of the 1993 lava flow sometime between 1981-82 and 1991.