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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 June 1, 2010, and ended on June 12, 2010.

Number of Tracklines

65

Distance Shot

765 km

Description

Minisparker seismic-reflection data of field activity S-12-10-SC: Oceanside to La Jolla, offshore southern California from 2010-06-01 to 2010-06-12

Purpose

This dataset includes raw and processed, high-resolution seismic-reflection data collected in 2010 to collect information on active offshore faults. The survey area is offshore southern California between Oceanside and La Jolla. The data were collected aboard the U.S. Geological Survey R/V Parke Snavely. The seismic-reflection data were acquired using a SIG 2mille minisparker. Subbottom acoustic penetration spanned tens to several hundreds of meters, variable by location.

Notes

Citation: Sliter, R.W., Conrad, J.E., Ryan, H.F., and Triezenberg, P.J., 2017, Minisparker seismic-reflection data of field activity S-12-10-SC: Oceanside to La Jolla, offshore southern California from 2010-06-01 to 2010-06-12: U.S. Geological Survey data release, doi:10.5066/F7QN64W8

Geographic Features

Southern California

Dataset Information

Processed Methods

Seismic Reflection

Processed Data Classes

Other

Data File Formats

SEG-Y

Embedded Navigation

Yes

Data Class

Processed

Seismic Data Provenances

Digitally Acquired 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.

Seismic-reflection SEG-Y files were corrected for swell effects using Sioseis software.
1) SEG-Y header cdp numbers were defined using the "header" Sioseis processes, and a band pass filter was applied;
2) Water-bottom time/shot-point pairs where created and added to the headers to guide the automated swell correction;
3) A swell filter was applied to the data;
4) A 120- to 800-Hz bandpass filter, mute and agc were applied, and the results were exported as a processed SEG-Y file.

Navigation Information

Datum

World Geodetic System 1984 (WGS84)

Location

Tracklines 65 total

Name Length (km) First SP Last SP First CDP Last CDP
OS-01 7 1 2,121 1 2,121
OS-01A 12 1 3,756 1 3,756
OS-02 19 1 5,882 1 5,882
OS-03 20 1 6,628 1 6,628
OS-04 21 1 5,999 1 5,999
OS-05 20 1 6,708 1 6,708
OS-06 19 1 5,631 1 5,631
OS-07 20 1 6,778 1 6,778
OS-08 18 1 5,324 1 5,324
OS-09 19 1 6,314 1 6,314
OS-10 17 1 4,683 1 4,683
OS-11 16 1 5,725 1 5,725
OS-12 19 1 5,436 1 5,436
OS-13 15 1 4,874 1 4,874
OS-14 3 1 900 1 900
OS-14A 13 1 4,004 1 4,004
OS-15 26 1 7,698 1 7,698
OS-16 9 1 2,438 1 2,438
OS-17 23 1 7,567 1 7,567
OS-17A 6 1 2,012 1 2,012
OS-18 1 1 358 1 358
OS-18A 15 1 4,864 1 4,864
OS-19 18 1 5,429 1 5,429
OS-20 12 1 3,924 1 3,924
OS-21 11 1 3,111 1 3,111
OS-22 20 1 6,424 1 6,424
OS-23 7 1 1,911 1 1,911
OS-24 6 1 2,034 1 2,034
OS-25 7 1 1,952 1 1,952
OS-26 6 1 1,698 1 1,698
OS-27 6 1 1,921 1 1,921
OS-28 6 1 1,787 1 1,787
OS-29 9 1 2,694 1 2,694
OS-30 7 1 1,783 1 1,783
OS-31 7 1 1,346 1 1,346
OS-32 7 1 1,341 1 1,341
OS-33 7 1 1,404 1 1,404
OS-34 4 1 775 1 775
OS-35 3 1 530 1 530
OS-36 5 1 1,006 1 1,006
OS-37 6 1 1,195 1 1,195
OS-38 8 1 1,912 1 1,912
OS-39 18 1 5,580 1 5,580
OS-39A 15 1 3,570 1 3,570
OS-40 8 1 1,822 1 1,822
OS-41 8 1 1,883 1 1,883
OS-42 8 1 1,702 1 1,702
OS-43 8 1 2,196 1 2,196
OS-44 10 1 2,474 1 2,474
OS-45 7 1 2,138 1 2,138
OS-46 7 1 1,986 1 1,986
OS-47 20 1 5,949 1 5,949
OS-48 12 1 4,231 1 4,231
OS-49 9 1 2,759 1 2,759
OS-50 16 1 4,209 1 4,209
OS-50A 20 1 4,856 1 4,856
OS-51 5 1 1,026 1 1,026
OS-52 14 1 3,136 1 3,136
OS-53 9 1 1,840 1 1,840
OS-54 10 1 2,229 1 2,229
OS-55 17 1 4,837 1 4,837
OS-56 11 1 2,506 1 2,506
OS-57 12 1 2,089 1 2,089
OS-58 12 1 2,728 1 2,728
OS-59 9 1 1,644 1 1,644