Further electronic distribution is not allowed. Tables and Figures Table 1. Sites of hydrothermal vent fluid collection. Schematic comparison of three methods of shipboard plume mapping and sampling. Location map for northeast Pacific spreading centers.
Triangles show location of known venting sites.
Thin line in sawtooth pattern is track of the CTD tow-yo path. Megaplume contours in temperature anomaly. Origin of EP87 is unknown. Both plumes were smaller and had lower temperature anomalies than EP86 or EP87. Summary of hydrothermal temperature anomalies observed along the crest of the Juan de Fuca Ridge, including Axial Volcano, from 1985 to 1989.