Global Hydrophone Network

Global Hydrophone Network

Hydrophones have been deployed in a variety of locations around the world, particularly in the past 20 years.  These deployments have been made by academic scientists, national governments (military and non-military), non-governmental organizations, and industry.  In some isolated cases, there has been small-scale coordination internationally among hydrophone operators, but IQOE seeks to promote more extensive cooperation. Such cooperation is especially important for implementation of the Ocean Sound Essential Ocean Variable of the Global Ocean Observing System.

The IQOE Science Committee approved formation of an IQOE Working Group on Global Hydrophone Network to implement the actions described below. 


Peter Tyack (USA/UK)

Other Members

Hilary Moors-Murphy (Canada)
Carrie Wall Bell (USA)
Miles Parsons (Australia)
Wayne Crawford  (France)
Karolin Thomisch (Germany)
John Ryan (USA)
Heidi Ahonen (Norway)

Terms of Reference

The IQOE Working Group on Global Hydrophone Network will conduct the following activities in 2022-2025:

  • Review the existing set of hydrophones to identify gaps in coverage and hydrophone operators not yet in the system who should be contacted.
  • Review metadata collected from hydrophone operators to determine if any changes need to be made in what metadata are collected.
  • Create policy for data sharing among operators and public.
  • Develop international organization of hydrophone operators.
  • Examine Table 4.1 from Ocean Sound Essential Ocean Variable (see Appendix) to determine how a hydrophone network could contribute.
  • Determine how the ocean bottom seismometer network could be linked to hydrophone network.
  • Propose how this WG could evolve to a participant in the GOOS system. 
  • Identify legal/national security implications to a global hydrophone system. What noise statistics would make data sharing shareable versus raw data?