We mapped the Canal de Chacao with seismic, magnetics and side scan sonar in 1999 for the Ministry of Public Works of the Republic of Chile. The objective was to map the geology down to about 200 meters for the foundation of the world’s largest suspension bridge. After finishing the first survey and presenting my findings (no faults), I returned to Chacao in February, 2000 to take some cross-current data to verify that there were no transform faults running parallel to our original in-line survey. Core drilling in late 2005 has shown that there are no faults in the survey area.

We returned in 2006 to run another reflection survey using a 48-channel active streamer with MARDAQ-25. Multibeam was run after the seismic was completed.  Again, results showed no faults or other geological anomalies.