Home1999 Treaties and Agreements ...Paraguay (99-913) – Memorandum of Understanding Concerning the Operation of a Seismic Monitoring Station in Paraguay hide Paraguay (99-913) – Memorandum of Understanding Concerning the Operation of a Seismic Monitoring Station in Paraguay TIAS Office of Treaty Affairs September 13, 1999 Arms Control: Seismic Observations Memorandum of understanding signed at Asuncion September 13, 1999; entered into force September 13, 1999. Download Attachment [525 KB] Tags Arms Control and Nonproliferation International Law, Treaties, and Agreements Paraguay