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.
water
N83 – Randolf Graves
Late night river survey with help from a geology enthusiast. One passive seismic survey collected data to a depth of 320 meters. Total survey time was 2 hours.
N81 – Napa Plums
A well on-site gives a clue to the water table. One passive seismic survey collected data to a depth of 62 meters. Total survey time was 1 hour.
N80 – Redwood Creek
Located next to Redwood Creek in Napa, two passive seismic surveys were done in order to get data to a depth of 155 meters. Total survey time was 3 hours.
N32 – Napa River
Sensors were placed on both sides of the Napa River for this survey. Data was observed to a depth of 155 meters. Total survey time was 1.5 hours.
N2 – Oxbow Commons
Located at the Oxbow Commons in the Napa River overflow, this passive seismic survey achieved a depth of 42 meters. Total survey time was 1 hour.
N1 – Solomon Memorial Grove
Located at the Solomon Memorial Grove near the Napa River downtown, this passive seismic survey was the very first for the NVSP and achieved a depth of 56 meters. Total survey time was 1 hour.