OCSA is a company of Geophysical Prospecting with established in the fields of Geotechnical Engineering (roads, dams, railways, tunnels, listening, quarries, etc.)., Hydrogeology, Mining, Geothermal, Archaeology and Marine Research.

OCSA was conceived and created as a company of Geophysical Prospecting by a group of geophysicists with many years of experience in this field and have worked in different companies and countries. The components of this group have been working together since 1974 in some cases, and since 2003 all of them.

The objective was to form a company OCSA of Geophysical Prospecting with enough qualified specialists to cover virtually all specialties in the profession in the non-oil field.

The geophysical group forming this company was formed, primarily, about Dr. ErnestoOrellana Silva, professor of geophysical sciences at the Faculty of Physics, UniversityComplutense of Madrid for 19 years.

In this website makes some descriptions of geophysical techniques, which do not pretend to be more than just a technical presentation to those who may need to use.