Descr: Record a 10 km refraction/wide andgle reflection experiment with 50 portable recorders in the Santa Fe Canyon area of NM. Profile crosses the La Bahada fault westward into the Santo Domingo Basin. The 50 recorders will be spaced at 200 m along the line and will record Vibroseis sweeps every minute during nightime recording hours. Addidionally, a 3 km CMP reflection profile will be recorded with 60 channel instruments using Vibroseis sources.