This group was constituted at the December 1998 FDSN meeting in Seattle to explore avenues for fruitful interaction between the Federation and the Comprehensive Test Ban Treaty Organization (CTBTO) and to provide a forum for individual FDSN members to raise and discuss issues of common interest related to the set up and operation of the CTBT International Monitoring System.
|Year||Location||Working Group Chair|
|2015||Prague, Czech Republic||Florian Haslinger|
|2013||Gothenburg, Sweden||Florian Haslinger|
|2011||Melbourne, Australia||Florian Haslinger|
|2009||Cape Town, South Africa||Jim Lyons|
Message Center Topic: FDSN Working Group IV