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  3. Magnetic anomaly
  4. Aeromagnetic surveys
  5. California

Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
San Francisco ARMS '58M-Dz152.4 m above ground1.60 km3,540 km
StonyfordM-Dz2134 m (barometer)1.60 km1,287 km
Clear Lake '72M-Dz1372 m (barometer)1.60 km1,680 km
San Francisco '73M-D914.4 m (barometer)1.60 km11,909 km
Clear Lake '85M-D304.8 m above ground0.80 km933 km
Clear Lake '95M-D304.8 m above ground0.45 km10,058 km
Ukiah 2009M-D304.8 m above ground0.80 km12,311 km
N. Great Valley SouthM-Dz762 m (barometer)1.60 km9,253 km
N.G.V. - Stony RiverM-Dz1372 m (barometer)1.60 km692 km
N.G.V. - Wilbur SpringsM-Dz1524 m (barometer)1.60 km1,287 km
ChicoM/R-D121.9 m 4.80 km4,869 km
ChicoSouthM-D244 m above ground0.80 km km
SacramentoM/R-D121.9 m 4.80 km5,005 km
Sacramento 2011M-D244 m above ground0.80 km km
Santa RosaM/R-D121.9 m 9.60 km1,646 km
UkiahM/R-D121.9 m 9.60 km2,441 km