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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 BayM-Dz304.8 m above ground1.60 km1,802 km
San Francisco ARMS '58M-Dz152.4 m above ground1.60 km3,540 km
San Francisco '73M-D914.4 m (barometer)1.60 km11,909 km
LivermoreM-D304.8 m above ground0.53 km7,724 km
San Francisco Bay '95M-D149.4 m above ground0.53 km5,310 km
N. Great Valley SouthM-Dz762 m (barometer)1.60 km9,253 km
SacramentoM/R-D121.9 m 4.80 km5,005 km
Sacramento 2011M-D244 m above ground0.80 km km
San FranciscoM/R-D121.9 m 4.80 km1,033 km
San JoseM/R-D121.9 m 4.80 km5,182 km
Santa RosaM/R-D121.9 m 9.60 km1,646 km