High-resolution seismic imaging of the West Napa Fault Zone at Buhman Avenue, Napa, California

Dates

Acquisition: 2016-11-10
Publication Date: 2020-03-06

Citation

Chan, J.H., Catchings, R.D., Nevitt, J.M., Goldman, M.R., Criley, C.J., Sickler, R.R., and Brooks, B.A., 2020, High-resolution seismic imaging of the West Napa Fault Zone at Buhman Avenue, Napa, California: U.S. Geological Survey data release, https://doi.org/10.5066/P92UWULX.

Summary

In November 2016, the U.S. Geological Survey acquired high-resolution P- and S-wave seismic data across the surface trace of the West Napa Fault zone near Buhman Avenue in Napa, California. We acquired seismic reflection, refraction, and guided-wave data along a 117-m-long profile across the known surface rupture zone of the West Napa Fault zone. To acquire the reflection and refraction data, we co-located shots and geophones, spaced every meter along the profile. We used 118 SercelTM L40A P-wave (40-Hz vertical-component) geophones with a sensitivity of 22.34 volts/meter/second to record 118 P-wave shots. We also used 118 SercelTM L28-LBH S-wave (4.5-Hz horizontal-component) geophones with a sensitivity of 31.3 volts/meter/second [...]

Summary

In November 2016, the U.S. Geological Survey acquired high-resolution P- and S-wave seismic data across the surface trace of the West Napa Fault zone near Buhman Avenue in Napa, California. We acquired seismic reflection, refraction, and guided-wave data along a 117-m-long profile across the known surface rupture zone of the West Napa Fault zone. To acquire the reflection and refraction data, we co-located shots and geophones, spaced every meter along the profile. We used 118 Sercel^TM L40A P-wave (40-Hz vertical-component) geophones with a sensitivity of 22.34 volts/meter/second to record 118 P-wave shots. We also used 118 Sercel^TM L28-LBH S-wave (4.5-Hz horizontal-component) geophones with a sensitivity of 31.3 volts/meter/second to record 118 S-wave shots. We generated P-wave data using a 2.5-kg sledgehammer and steel plate combination. S-wave sources were generated by horizontally striking an aluminum block with a 2.5-kg sledgehammer. We acquired fault-zone guided-wave data by generating P- and S-wave energy (2.5-kg sledgehammer and steel plate or aluminum block) approximately 44 and 55 m northwest of the P- and S-wave recording arrays. All data were recorded using two 60-channel Geometrics Stratavisor NX-60^TMseismographs with a 24-bit analog-to-digital converter (Subcommittee of the SEG Engineering and Groundwater Geophysics Committee, 1990); the seismographs were connected to the P- and S-wave geophones via refraction cables. Each shot was recorded for two seconds, with data recording starting 100 ms before the actual time of the shot. Data were recorded at a sampling rate of 0.5 ms, or 2000 samples per second. This report provides the metadata needed to utilize the seismic data.
Reference:
Subcommittee of the SEG Engineering and Groundwater Geophysics Committee, Pullan, S. E., Chairman, 1990, Recommended standard for seismic (/radar) data files in the personal computer environment: Geophysics, vol. 55, no. 9, p. 1260-1271.
Acknowledgements: We thank Keith Galvin, Blathnaid McKevitt, Shuai Zhao, Joey Mason, Carolyn Stieban, Edward Zhang, and Luther Strayer for their assistance in the field. We thank Kristan and Robert Forloine for providing field site access. We also thank Jemile Erdem for metadata review.

Contacts

Point of Contact :: Joanne H Chan, Rufus D Catchings
Process Contact :: Mark R Goldman
Originator :: Joanne H Chan, Rufus D Catchings, Mark R Goldman, Johanna M Nevitt, Coyn J Criley, Robert R Sickler, Benjamin A Brooks
Metadata Contact :: Joanne H Chan, Mark R Goldman
Publisher :: U.S. Geological Survey
Participant :: Keith Galvin, Blathnaid McKevitt, Shuai Zhao, Joey Mason, Edward Zhang, Carolyn Stieban, Luther Strayer
SDC Owner :: Earthquake Hazards Program
Data Owner :: Earthquake Hazards Program
Distributor :: U.S. Geological Survey - ScienceBase
USGS Mission Area :: Natural Hazards
SDC Data Owner :: Earthquake Hazards Program

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Buhman.78015.tar “SEG2 seismic data”		103.9 MB	application/x-tar
Buhman.78023.tar “SEG2 seismic data”		102.62 MB	application/x-tar
Buhman2016_locations.csv “Station locations”		4.18 KB	text/csv
Buhman2016_shots.csv “Shot details”		8.6 KB	text/csv
High_resolution_seismic_imaging_of_the_West_Napa_Fault_Zone_at_Buhman_Avenue_Napa_California.xml Original FGDC Metadata	View	16.96 KB	application/fgdc+xml
NapaBuhman2016_map.png “Map of study area”		2.68 MB	image/png

Purpose

The primary goal of the seismic survey was to investigate the subsurface damage from rupturing associated with the 2014 MW 6.0 South Napa earthquake.

High-resolution seismic imaging of the West Napa Fault Zone at Buhman Avenue, Napa, California

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