AKA: Sparker testing 2021
Other ID: none
Status: Completed
Organization(s): USGS, Pacific Coastal and Marine Science Center
Funding Program(s): Coastal and marine earthquake, tsunami, and landslide active margin field studies (ZP00EQV)
Principal Investigator(s): Patrick Hart
Affiliate Investigator(s): Jared Kluesner, USGS Dave Foster, USGS
Information Specialist(s): Alicia Balster-gee
Data Type(s): Seismics: Sparker
Scientific Purpose/Goals: Characterization of sparker source level decay with distance and water depth.
Vehicle(s): None
Start Port/Location: Santa Cruz, CA
End Port/Location: Santa Cruz, CA
Start Date: 2021-04-19
End Date: 2021-04-28
Equipment Used: Calibrated single channel phones, Mini sparker
Information to be Derived: Sparker sound levels
Summary of Activity and Data Gathered: Collected calibrated hydrophone sparker source levels at 0 to 4 km offsets at seven sites from 25m to 600 m water depths
Staff: Alicia Balster-gee
Affiliate Staff:
Notes:
Location:
Monterey canyon region
| Boundaries | |||
|---|---|---|---|
| North: 37.09648707 | South: 36.72920243 | West: -122.47431993 | East: -121.81507587 |
Platform(s):
 Parke Snavely |
Balster-Gee, A.F., Baldwin, W.E., and Hart, P.E., 2022, Calibrated marine sparker source amplitude decay versus offset offshore Santa Cruz, California: U.S. Geological Survey data release, https://doi.org/10.5066/P9EHITBI.
| Survey Equipment | Survey Info | Data Type(s) | Data Collected |
|---|---|---|---|
| Calibrated single channel phones | Calibrated hydrophone on RV San Lorenzo used to record sparker source levels deployed from RV Snavely ot distances of ~ 4 km | Sparker | Marine sparker source SEG-Y seismic data (Seismic data were recorded aboard the R/V Parke Snavely (RVPS, source vessel) during USGS field activity 2021-619-FA. Data were recorded with a broadband spherical reference Reson TC4034 hydrophone positioned directly below the SIG ELP790 or the Applied Acoustics Delta sparker source which were towed from the stern of the vessel. Source data were recorded as the R/V Parke Snavely made several passes along 7 different water depth transects and are presented in SEG-Y format. Shot point navigation are provided in an accompanying comma-delimited text file, as well as in a shapefile for visualization purposes.) Marine sparker SEG-Y seismic data recorded using receive hydrophones (Seismic data were recorded from the R/V San Lorenzo (RVSL, receive vessel) of a two-vessel marine sparker seismic survey conducted by the U.S. Geological Survey (USGS) in April of 2021 off the coast of Santa Cruz, California (USGS field activity 2021-619-FA). The R/V Parke Snavely (RVPS, source vessel) towed a marine sparker sound source along seven depth site transects ranging between 25 and 600 meters. The RVSL maintained a nearly stationary position at the midpoint of each transect and recorded sound data with a broadband omnidirectional Cetacean Research CR3 hydrophone positioned between 10- and 20-meters water depth below the RVSL. RVSL receive seismic data are presented in SEG-Y format. Shot point navigation are provided in an accompanying comma-delimited text file, as well as in a shapefile for visualization purposes. ) Peak marine sparker amplitude data ones coll and pressure vs. offset plots (Peak amplitude values recorded at source and receive hydrophones during a two-vessel marine sparker seismic survey conducted by the U.S. Geological Survey (USGS) in April of 2021 off the coast of Santa Cruz, California (USGS field activity 2021-619-FA) are presented. On the source vessel (R/V Parke Snavely, RVPS), near-field data were recorded using a broadband spherical reference Reson TC4034 hydrophone positioned 1-meter below the sparker source (either a SIG ELP790 or an Applied Acoustics Delta sparker) along seven depth site transects ranging between 25 and 600 meters. On the nearly stationary receive vessel (R/V San Lorenzo, RVSL), omnidirectional Cetacean Research CR3 hydrophones were positioned between 10- and 20-meters water depth below the vessel to record the far-field signal. Data are presented in csv format, accompanied by combined scatter plots per depth site and mean-filtered curve plots for visualization purposes.) R/V San Lorenzo (receive vessel) navigation and survey geometry (Navigation data were recorded for the R/V San Lorenzo (RVSL, receive vessel) during USGS field activity 2021-619-FA in April of 2021 off the coast of Santa Cruz, California. Data were collected as the RVSL maintained a nearly stationary position at the midpoint along seven depth site transects in water depths ranging between 25 and 600 meters while the R/V Parke Snavely (RVPS, source vessel) towed a sparker sound source along the transects. Navigation data and survey geometry information (offset distances and source layback position) are presented in csv format as well as a trackline shapefile.) R/V Parke Snavely (source vessel) navigation and survey geometry (Navigation data were recorded for the R/V Parke Snavely (RVPS, source vessel) during USGS field activity 2021-619-FA in April of 2021 off the coast of Santa Cruz, California. Data were collected as the RVPS towed a marine sparker sound source along seven depth site transects in water depths ranging between 25 and 600 meters. The R/V San Lorenzo (RVSL, receive vessel) maintained a nearly stationary position at the midpoint along the seven depth site transects and recorded sound with a calibrated hydrophone. Navigation data and survey geometry information are presented in csv format as well as a trackline shapefile.) |
| Mini sparker | Sparker source was deployed from RV Snavely and source levels were recored by a calibrated hydrophone deployed from stationary RV San Lorenzo | Sparker |
