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Passive Seismic Data of the Napa Valley

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Stefan Burns

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

California Earthquakes – A Pattern

July 27, 2020July 27, 2020 by Stefan Burns

California has a complicated geologic history, and its patterns of earthquake is no different. Seismic events of incredible magnitude have shook the SF Bay Area for millions of years, and over the past 150 years, we’ve recorded an increasing number of these events. We must look to earthquake patterns in order to best predict the next “Big One”.

Categories Blog Tags earthquake, history 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
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Recent Posts

  • N85 – 3rd Ave
  • N84 – North Ave
  • N83 – Randolf Graves
  • California Earthquakes – A Pattern
  • N81 – Napa Plums

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