B-05-11-CC
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General Information
Data Type
Singlechannel Seismic
Data Acquisition System
Sparker and Streamer
Contributor
Pacific Coastal and Marine Science Center
Dates
Started on Sept. 12, 2011, and ended on Sept. 26, 2011.
Number of Tracklines
177
Distance Shot
747 km
Description
Minisparker seismic-reflection data of field activity B-05-11-CC, from Point Sur to Morro Bay, offshore central California, 2011-09-12 to 2011-09-26
Purpose
This data release includes marine geophysical data collected on cruise B-05-11-CC between Point Sur and Morro Bay, California. The overall goal of this research is to understand the shallow geologic framework of this area as a contribution to the California Seafloor Mapping Program (Johnson and others, 2017). Particular focus is on mapping active faults and documenting the distribution and thickness of offshore, unconsolidated sediment.
Approximately 700 km of single-channel, seismic-reflection data between Point Sur and Morro Bay were collected during the cruise. Seismic profiles were collected at 1 km line spacing between Point Sur and Piedras Blancas, crossing the Hosgri-San Gregorio fault system 60 times. Data were also collected to the south on the south flank of Piedras Blancas (south of San Simeon) crossing the Hosgri-San Gregorio fault 13 times at 800 m line spacing. Farther south, additional data were collected offshore of Morro Bay with a focus on crossing the Los Osos fault zone. Data collected in the southern two areas overlap with and supplement data available in Sliter and others (2009).
Seismic-reflection data were collected using a minisparker system that creates an acoustic signal by discharging an electrical pulse between electrodes and a ground that generates a frequency spectrum roughly between 200 and 1600 Hz. At boat speeds of 4 to 4.5 nm/hour, seismic traces were collected roughly every 1 to 2 meters. Water depths were between 20 m and 600 m. Acoustic pulses were generated at 0.5-second intervals on profiles where maximum depth was about 300 m; a 1-second interval was used on the deeper water profiles. Standard SEG-Y files were generated using a Triton Subbottom Logger (SBL). Seismic data processing was accomplished using Sioseis, a public-domain software developed at Scripps Institute of Oceanography (part of the University of California at San Diego), and SeismicUnix developed at the Colorado School of Mines. The processing of these data consisted of a bandpass filter, mute function, automatic gain control, water bottom detect, swell correction, and scaling/plotting. Both raw data in SEG-Y format and processed (corrected) data are provided here.
Notes
Suggested Citation: Johnson, S.Y., Hartwell, S.R., Sliter, R.W., and Beeson, J.W., 2017, Minisparker seismic-reflection data of field activity B-05-11-CC, from Point Sur to Morro Bay, offshore central California, 2011-09-12 to 2011-09-26: U.S. Geological Survey data release, doi:10.5066/F7K35S44
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Geographic Features
Central California
Dataset Information
Processed Methods
Seismic Reflection
Processed Data Classes
Other
Data File Formats
SEG-Y
Embedded Navigation
Yes
Data Class
Compilation
Seismic Data Provenances
Digitally Acquired Digital SEG, Digital SEG
Data Media
Online
Processing
Seismic-reflection data were collected using a minisparker system that creates an acoustic signal by discharging a 500-Joule, high-voltage electrical pulse between electrodes and a ground that generates a frequency spectrum roughly between 200 and 1,600 Hz. At boat speeds of 4 to 4.5 nm/hour, seismic traces were collected roughly every 1 to 2 meters. The data were recorded on a 15-m-long hydrophone streamer in standard SEG-Y 32-bit floating-point format with Triton Subbottom Logger (SBL) software that merges seismic-reflection data with differential GPS navigation data.
SEG-Y header data were normalized using the "header" Sioseis processes, and a band pass filter was applied. Next, each SEG-Y file was displayed and up to 16 water-bottom time/shot-point pairs where recorded to guide the automated water-bottom picker used to mute the water column. Finally, a swell filter was applied to the data, and the results were exported as a new SEG-Y file.
Navigation Information
Datum
World Geodetic System 1984 (WGS84)
Related Publications
Johnson, S.Y., Cochrane, G.R., Golden, N.E., Dartnell, P., Hartwell, S.R., Cochran, S.A., and Watt, J.T., 2017, The California Seafloor Mapping Program - Providing science and geospatial data for California's State Waters: Ocean and Coastal Management, v. 140, p. 88-104, http://dx.doi.org/10.1016/j.ocecoaman.2017.02.004.
Sliter, R. W., Triezenberg, P. J., Hart, P. E., Watt, J. T., Johnson, S.Y., and Scheirer, D. S., 2009, High-resolution seismic reflection and marine magnetic data along the Hosgri Fault Zone, central California: U.S. Geological Survey Open-File Report 2009-1100, https://pubs.usgs.gov/of/2009/1100/.
Location
Tracklines 177 total
| Name | Length (km) | First SP | Last SP | First CDP | Last CDP |
|---|
| BSS-01 | 5 | 1 | 3,536 | 1 | 3,536 |
| BSS-02 | 1 | 1 | 718 | 1 | 718 |
| BSS-03 | 5 | 1 | 3,756 | 1 | 3,756 |
| BSS-04 | 1 | 1 | 750 | 1 | 750 |
| BSS-05 | 5 | 1 | 4,478 | 1 | 4,478 |
| BSS-05A | 1 | 1 | 813 | 1 | 813 |
| BSS-06 | 6 | 1 | 4,533 | 1 | 4,533 |
| BSS-07 | 1 | 1 | 308 | 1 | 308 |
| BSS-08 | 6 | 1 | 2,479 | 1 | 2,479 |
| BSS-09 | 1 | 1 | 501 | 1 | 501 |
| BSS-10 | 6 | 1 | 2,571 | 1 | 2,571 |
| BSS-100 | 6 | 1 | 2,453 | 1 | 2,453 |
| BSS-101 | 1 | 1 | 309 | 1 | 309 |
| BSS-102 | 5 | 1 | 2,216 | 1 | 2,216 |
| BSS-103 | 5 | 1 | 1,852 | 1 | 1,852 |
| BSS-104 | 1 | 1 | 331 | 1 | 331 |
| BSS-105 | 5 | 1 | 1,855 | 1 | 1,855 |
| BSS-106 | 1 | 1 | 384 | 1 | 384 |
| BSS-107 | 5 | 1 | 2,076 | 1 | 2,076 |
| BSS-107A | 0 | 1 | 85 | 1 | 85 |
| BSS-108 | 1 | 1 | 271 | 1 | 271 |
| BSS-109 | 5 | 1 | 2,153 | 1 | 2,153 |
| BSS-11 | 1 | 1 | 401 | 1 | 401 |
| BSS-110 | 7 | 1 | 2,903 | 1 | 2,903 |
| BSS-111 | 1 | 1 | 339 | 1 | 339 |
| BSS-112 | 7 | 1 | 2,841 | 1 | 2,841 |
| BSS-113 | 1 | 1 | 408 | 1 | 408 |
| BSS-114 | 8 | 1 | 2,981 | 1 | 2,981 |
| BSS-115 | 1 | 1 | 333 | 1 | 333 |
| BSS-116 | 7 | 1 | 2,872 | 1 | 2,872 |
| BSS-117 | 1 | 1 | 399 | 1 | 399 |
| BSS-118 | 7 | 1 | 2,592 | 1 | 2,592 |
| BSS-119 | 6 | 1 | 2,316 | 1 | 2,316 |
| BSS-12 | 6 | 1 | 2,479 | 1 | 2,479 |
| BSS-120 | 1 | 1 | 255 | 1 | 255 |
| BSS-121 | 6 | 1 | 3,107 | 1 | 3,107 |
| BSS-122 | 1 | 1 | 312 | 1 | 312 |
| BSS-123 | 6 | 1 | 2,642 | 1 | 2,642 |
| BSS-124 | 10 | 1 | 8,286 | 1 | 8,286 |
| BSS-125 | 14 | 1 | 10,962 | 1 | 10,962 |
| BSS-126 | 5 | 1 | 4,354 | 1 | 4,354 |
| BSS-127 | 1 | 1 | 604 | 1 | 604 |
| BSS-128 | 5 | 1 | 4,001 | 1 | 4,001 |
| BSS-129 | 1 | 1 | 566 | 1 | 566 |
| BSS-13 | 6 | 1 | 2,542 | 1 | 2,542 |
| BSS-130 | 4 | 1 | 3,777 | 1 | 3,777 |
| BSS-131 | 6 | 1 | 5,400 | 1 | 5,400 |
| BSS-132 | 1 | 1 | 857 | 1 | 857 |
| BSS-133 | 6 | 1 | 2,635 | 1 | 2,635 |
| BSS-134 | 1 | 1 | 331 | 1 | 331 |
| BSS-135 | 6 | 1 | 2,640 | 1 | 2,640 |
| BSS-136 | 5 | 1 | 2,048 | 1 | 2,048 |
| BSS-137 | 11 | 1 | 9,637 | 1 | 9,637 |
| BSS-138 | 7 | 1 | 5,378 | 1 | 5,378 |
| BSS-139 | 5 | 1 | 3,488 | 1 | 3,488 |
| BSS-140 | 1 | 1 | 1,008 | 1 | 1,008 |
| BSS-140A | 6 | 1 | 5,295 | 1 | 5,295 |
| BSS-141 | 5 | 1 | 4,600 | 1 | 4,600 |
| BSS-142 | 1 | 1 | 681 | 1 | 681 |
| BSS-143 | 5 | 1 | 3,850 | 1 | 3,850 |
| BSS-144 | 17 | 1 | 14,076 | 1 | 14,076 |
| BSS-145 | 9 | 1 | 8,219 | 1 | 8,219 |
| BSS-146 | 6 | 1 | 2,800 | 1 | 2,800 |
| BSS-147 | 12 | 1 | 5,191 | 1 | 5,191 |
| BSS-148 | 9 | 1 | 3,663 | 1 | 3,663 |
| BSS-149 | 10 | 1 | 4,255 | 1 | 4,255 |
| BSS-15 | 1 | 1 | 391 | 1 | 391 |
| BSS-16 | 6 | 1 | 2,417 | 1 | 2,417 |
| BSS-17 | 0 | 1 | 125 | 1 | 125 |
| BSS-18 | 7 | 1 | 2,668 | 1 | 2,668 |
| BSS-19 | 1 | 1 | 664 | 1 | 664 |
| BSS-20 | 7 | 1 | 2,708 | 1 | 2,708 |
| BSS-21 | 7 | 1 | 2,818 | 1 | 2,818 |
| BSS-22 | 6 | 1 | 2,501 | 1 | 2,501 |
| BSS-23 | 1 | 1 | 436 | 1 | 436 |
| BSS-24 | 6 | 1 | 2,453 | 1 | 2,453 |
| BSS-25 | 1 | 1 | 393 | 1 | 393 |
| BSS-26 | 6 | 1 | 2,033 | 1 | 2,033 |
| BSS-27 | 6 | 1 | 2,453 | 1 | 2,453 |
| BSS-28 | 1 | 1 | 401 | 1 | 401 |
| BSS-29 | 6 | 1 | 2,338 | 1 | 2,338 |
| BSS-30 | 1 | 1 | 343 | 1 | 343 |
| BSS-31 | 6 | 1 | 2,597 | 1 | 2,597 |
| BSS-32 | 6 | 1 | 2,638 | 1 | 2,638 |
| BSS-33 | 1 | 1 | 356 | 1 | 356 |
| BSS-34 | 6 | 1 | 2,981 | 1 | 2,981 |
| BSS-35 | 1 | 1 | 341 | 1 | 341 |
| BSS-36 | 6 | 1 | 2,352 | 1 | 2,352 |
| BSS-37 | 1 | 1 | 252 | 1 | 252 |
| BSS-38 | 6 | 1 | 2,583 | 1 | 2,583 |
| BSS-39 | 5 | 1 | 2,099 | 1 | 2,099 |
| BSS-40 | 1 | 1 | 359 | 1 | 359 |
| BSS-41 | 5 | 1 | 2,344 | 1 | 2,344 |
| BSS-42 | 1 | 1 | 346 | 1 | 346 |
| BSS-43 | 5 | 1 | 2,275 | 1 | 2,275 |
| BSS-44 | 1 | 1 | 286 | 1 | 286 |
| BSS-45 | 5 | 1 | 2,270 | 1 | 2,270 |
| BSS-46 | 1 | 1 | 357 | 1 | 357 |
| BSS-47 | 5 | 1 | 2,116 | 1 | 2,116 |
| BSS-48 | 0 | 1 | 156 | 1 | 156 |
| BSS-49 | 7 | 1 | 6,247 | 1 | 6,247 |
| BSS-51 | 7 | 1 | 6,390 | 1 | 6,390 |
| BSS-52 | 1 | 1 | 819 | 1 | 819 |
| BSS-53 | 3 | 1 | 2,336 | 1 | 2,336 |
| BSS-54 | 6 | 1 | 5,529 | 1 | 5,529 |
| BSS-55 | 1 | 1 | 825 | 1 | 825 |
| BSS-56 | 5 | 1 | 3,972 | 1 | 3,972 |
| BSS-57 | 1 | 1 | 706 | 1 | 706 |
| BSS-58 | 4 | 1 | 3,116 | 1 | 3,116 |
| BSS-58A | 1 | 1 | 575 | 1 | 575 |
| BSS-59 | 1 | 1 | 841 | 1 | 841 |
| BSS-60 | 5 | 1 | 3,880 | 1 | 3,880 |
| BSS-61 | 5 | 1 | 4,349 | 1 | 4,349 |
| BSS-62 | 1 | 1 | 779 | 1 | 779 |
| BSS-63 | 6 | 1 | 4,725 | 1 | 4,725 |
| BSS-64 | 8 | 361 | 7,111 | 361 | 7,111 |
| BSS-65 | 1 | 1 | 629 | 1 | 629 |
| BSS-66 | 10 | 1 | 8,059 | 1 | 8,059 |
| BSS-67 | 1 | 1 | 744 | 1 | 744 |
| BSS-68 | 10 | 1 | 8,144 | 1 | 8,144 |
| BSS-69 | 9 | 9,516 | 7,533 | 9,516 | 7,533 |
| BSS-70 | 1 | 1 | 630 | 1 | 630 |
| BSS-71 | 5 | 1 | 4,111 | 1 | 4,111 |
| BSS-71A | 4 | 1 | 2,860 | 1 | 2,860 |
| BSS-72 | 4 | 842 | 3,166 | 842 | 3,166 |
| BSS-72A | 2 | 631 | 1,395 | 631 | 1,395 |
| BSS-72B | 2 | 1 | 1,215 | 1 | 1,215 |
| BSS-73 | 1 | 1 | 483 | 1 | 483 |
| BSS-74 | 0 | 1 | 333 | 1 | 333 |
| BSS-74A | 6 | 1 | 5,244 | 1 | 5,244 |
| BSS-75 | 1 | 1 | 587 | 1 | 587 |
| BSS-76 | 6 | 1 | 5,346 | 1 | 5,346 |
| BSS-77 | 6 | 1 | 5,747 | 1 | 5,747 |
| BSS-78 | 1 | 1 | 639 | 1 | 639 |
| BSS-79 | 7 | 1 | 5,781 | 1 | 5,781 |
| BSS-80 | 1 | 1 | 740 | 1 | 740 |
| BSS-81 | 6 | 1 | 5,836 | 1 | 5,836 |
| BSS-82 | 1 | 1 | 526 | 1 | 526 |
| BSS-83 | 6 | 1 | 5,704 | 1 | 5,704 |
| BSS-84 | 1 | 1 | 959 | 1 | 959 |
| BSS-84A | 6 | 1 | 5,464 | 1 | 5,464 |
| BSS-85 | 1 | 1 | 588 | 1 | 588 |
| BSS-86 | 6 | 1 | 4,969 | 1 | 4,969 |
| BSS-87 | 6 | 1 | 5,052 | 1 | 5,052 |
| BSS-89 | 6 | 1 | 4,466 | 1 | 4,466 |
| BSS-90 | 6 | 1 | 2,569 | 1 | 2,569 |
| BSS-91 | 1 | 1 | 299 | 1 | 299 |
| BSS-92 | 6 | 1 | 2,517 | 1 | 2,517 |
| BSS-93 | 5 | 1 | 2,044 | 1 | 2,044 |
| BSS-94 | 1 | 1 | 301 | 1 | 301 |
| BSS-95 | 5 | 1 | 2,104 | 1 | 2,104 |
| BSS-96 | 5 | 1 | 1,860 | 1 | 1,860 |
| BSS-96A | 1 | 1 | 257 | 1 | 257 |
| BSS-97 | 1 | 1 | 323 | 1 | 323 |
| BSS-98 | 6 | 1 | 2,481 | 1 | 2,481 |
| BSS-99 | 1 | 1 | 544 | 1 | 544 |
| EBS-01 | 6 | 1 | 5,003 | 1 | 5,003 |
| EBS-02 | 8 | 1 | 6,759 | 1 | 6,759 |
| EBS-03 | 3 | 1 | 2,803 | 1 | 2,803 |
| EBS-04 | 9 | 1 | 6,850 | 1 | 6,850 |
| EBS-05 | 8 | 1 | 6,706 | 1 | 6,706 |
| EBS-06 | 4 | 1 | 3,064 | 1 | 3,064 |
| EBS-07 | 11 | 1 | 8,724 | 1 | 8,724 |
| EBS-08 | 11 | 1 | 9,061 | 1 | 9,061 |
| SSS-01 | 3 | 1 | 2,125 | 1 | 2,125 |
| SSS-02 | 3 | 1 | 2,703 | 1 | 2,703 |
| SSS-03 | 3 | 1 | 2,213 | 1 | 2,213 |
| SSS-04 | 3 | 1 | 2,690 | 1 | 2,690 |
| SSS-05 | 3 | 1 | 2,458 | 1 | 2,458 |
| SSS-06 | 3 | 1 | 2,453 | 1 | 2,453 |
| SSS-07 | 3 | 1 | 2,118 | 1 | 2,118 |
| SSS-08 | 3 | 1 | 2,222 | 1 | 2,222 |
| SSS-09 | 3 | 1 | 2,144 | 1 | 2,144 |
| SSS-10 | 3 | 1 | 2,251 | 1 | 2,251 |
| SSS-11 | 2 | 1 | 1,801 | 1 | 1,801 |
| SSS-12 | 2 | 1 | 1,967 | 1 | 1,967 |
| SSS-13 | 2 | 1 | 2,255 | 1 | 2,255 |
