- Instituto Geof�sico. Escuela Polit�cnica Nacional (EPN). Quito, Ecuador. 2001.
- Instituto Geof�sico del Per� (IGP). Lima, Peru. 2001.
- Geothermal Institute (GI). Auckland, New Zealand. 2001.
- Fundaci�n Venezolana de Investi-
gaciones Sismol�gicas (FUNVISIS). Caracas, Venezuela. 2000.
- Observatorio Sismol�gico San Calixto. La Paz, Bolivia. 1996.
- Geological Survey of Canada. Ottawa, Canada. 1995.
- World Seismic Safety Initiative. Hannover, Germany. 1994.
- Norwegian Seismological Observatory (NORSAR). Kjeller, Norway. 1993.
- IDNDR Committee. Geneve, Switzerland. 1993.
- Centre d'Etudes des Risques G�ologiques. Geneve, Switzerland. 1993.
- Gesellschaft f�r Technische Zusammenarbeit (GTZ). Eschborn, Germany. 1993.
- Istituto Internazionale di la Vulcanologia. Catania, Italy. 1992.
- Royal School of Technologies. Stockholm, Sweeden. 1991.
- Geophysical Institute. Universitetet i Bergen, Norway. 1991.
- Institut f�r Geophysik. Universitat Stuttgart, Germany. 1991.
- Seismological Observatory Gr�fenberg. Erlangen, Germany. 1991.
- International School of Geothermics. Pisa, Italy. 1990.
- Division of Geological Sciences, UNESCO. Paris, France. 1988.
