Notes on Vent Field Description:
depth is not provided since position is approximate; volcano 272080 Biliran is just north of Leyte Island; http://www.gns.cri.nz/research/marine/kermadec/images/Table2_vent_sites_.pdf, not able to access 28 May 2015: "submarine vents north of Leyte have been reported, Bicol arc (E.G. Ramos, pers. commun., 2002)"
Year and How Discovered (if active, visual confirmation is listed first):
2002 or earlier some indications of activity
Discovery References (text):