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Passive Seismic Data of the Napa Valley

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N-Surveys

N-survey Napa Valley Seismic Project case studies

N85 – 3rd Ave

August 11, 2020August 8, 2020 by Stefan Burns

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.

Categories N-Surveys Tags 110, creek, volcanic, water, well Leave a comment

N84 – North Ave

August 11, 2020August 8, 2020 by Stefan Burns

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.

Categories N-Surveys Tags 140m, andesite, tuft, volcanic Leave a comment

N83 – Randolf Graves

August 8, 2020August 6, 2020 by Stefan Burns

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.

Categories N-Surveys Tags 300m, river, water Leave a comment

N81 – Napa Plums

July 23, 2020July 19, 2020 by Stefan Burns

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.

Categories N-Surveys Tags 60m, water, well

N80 – Redwood Creek

July 19, 2020July 18, 2020 by Stefan Burns

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.

Categories N-Surveys Tags 150m, water Leave a comment

N60 – Esther Deaver Park

August 6, 2020June 24, 2020 by Stefan Burns

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.

Categories N-Surveys Tags B, Flag, volcanic 1 Comment

N34 – Browns Valley

August 6, 2020May 29, 2020 by Stefan Burns

First ever Fibonacci spiral passive-seismic survey. Good coherencies across a large number of spacings and pairs show the quality of data collected during Fib surveys. One passive seismic survey collected data to a depth of 67 meters. Total survey time was 1.5 hour.

Categories N-Surveys Tags fibonacci Leave a comment

N32 – Napa River

July 19, 2020May 23, 2020 by Stefan Burns

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.

Categories N-Surveys Tags 150m, oxbow, river, water Leave a comment

N26 – Silverado School

July 30, 2020May 20, 2020 by Stefan Burns

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.

Categories N-Surveys Tags 250m, h/v, volcanic Leave a comment

N2 – Oxbow Commons

July 19, 2020May 2, 2020 by Stefan Burns

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.

Categories N-Surveys Tags 40m, oxbow, river, water Leave a comment
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Recent Posts

  • N85 – 3rd Ave
  • N84 – North Ave
  • N83 – Randolf Graves
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  • N81 – Napa Plums

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