N85 – 3rd Ave
Thick alluvium transitions to hard volcanics at depth, and a well on-site gives clues to the water table. One passive seismic survey collected data to a depth of 113 meters. Total survey time was 3 hours.
volcanic
N84 – North Ave
An open pit at the neighbors provides snapshots of the volcanic rocks 3 meters below the surface. One passive-seismic survey collected data to 144 meters, total survey time was 2 hours.
N60 – Esther Deaver Park
Geologic outcrops from N77 give insights into the passive-seismic data here. One passive seismic survey collected data to a depth of 90 meters. Total survey time was 1 hour.
N26 – Silverado School
Silverado School is located in the gently rolling volcanics of east Napa. Two passive-seismic surveys have been done thus far, and data has been collected from 7-270 meters. Total survey time 4 hours.