BHP Minerals Exploration.
- Department of Geological Sciences. Colby College, Waterville, Maine, USA (2001).
- Guest lectures at the M.Sc. program in Economic Geology at the Universidad Cat�lica del Norte between 1997 and 2000. Antofagasta, Chile.
- Departamento de Sismolog�a. Universidad de Chile. Santiago, Chile (1996).
- Several Talks during annual meeting of the German Geophysical Society between 1991 and 1996.
- Swiss Seismological Observatory. Eidgen�ssische Technische Hochschule. Z�rich, Switzerland (1994).
- Colegio de Ingenieros de Costa Rica. San Jos�, Costa Rica (1994).
- Departamento de Sismolog�a de INETER. Managua, Nicaragua (1994).
- Some university internal talks in Berlin, Germany during Postdoc fellowship in 1993.
- Practicals and seminar classes on Applied Geophysics (gravity, magnetics, electric, seismic) hold for students of Geology and Mining Engineering during Ph.D. education in Freiberg beween October 1989 and January 1993.
- Zentralinstitut f�r Physik der Erde (ZIPE), now GeoForschunsZentrum (GFZ). Potsdam, Germany (1987).
- Several university internal talks in Freiberg, Germany during B.Sc., M.Sc. and Ph.D. education between 1986 and 1993.
