Alicia F. Balster-Gee
Jared W. Kluesner
Janet T. Watt
Jenna C. Hill
Daniel S. Brothers
Melanie J. Michalak
Daniel O’Shea
20200220
Multichannel sparker seismic reflection data of USGS field activity 2018-658-FA collected between Cape Blanco and Cape Mendocino from 2018-10-04 to 2018-10-18
seismic-reflection data in SEG-Y format
data release
DOI:10.5066/P9R3QM97
Pacific Coastal and Marine Science Center, Santa Cruz, California
U.S. Geological Survey
https://doi.org/10.5066/P9R3QM97
https://www.sciencebase.gov/catalog/file/get/5e2a40a5e4b0a79317cf81b0
This data release contains processed high-resolution multichannel sparker seismic-reflection (MCS) data that were collected aboard Humboldt State University’s R/V Coral Sea in October of 2018 on U.S. Geological Survey cruise 2018-658-FA on the shelf and slope between Cape Blanco, Oregon, and Cape Mendocino, California. MCS data were collected to characterize quaternary deformation and sediment dynamics along the southern Cascadia margin.
The USGS collected high-resolution sparker MCS profiles in October of 2018 along the southern Cascadia margin and marine forearc between Cape Blanco, Oregon, and Cape Mendocino, California. Primary goals of this survey were to image the offshore portion of the Quaternary active Little Salmon and Mad River fault zones. Other goals were to image the stratigraphy of Trinidad, Sixes, and Rogue canyons. MCS data were collected using a Delta Sparker source and recorded on an 88-channel digital streamer. These data and information are intended for science researchers, students from elementary through college, policy makers, and general public.
Additional information about the field activities from which these data were derived is available online at:
https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-658-FA
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
20181004
20181018
ground condition at time data were collected
As needed
-125.38574219
-123.48388672
43.25108812
40.14849082
USGS Metadata Identifier
USGS:5e2a40a5e4b0a79317cf81b0
ISO 19115 Topic Category
geoscientificInformation
oceans
Data Categories for Marine Planning
Bathymetry and Elevation
USGS Thesaurus
sub-bottom profiling
geospatial datasets
marine geophysics
Marine Realms Information Bank (MRIB) keywords
seismic reflection profiling
Continental Margin
None
U.S. Geological Survey
USGS
Coastal and Marine Hazards and Resources Program
CMHRP
Pacific Coastal and Marine Science Center
PCMSC
sparker
Geographic Names Information System (GNIS)
Pacific Ocean
State of California
State of Oregon
Crescent City
City of Eureka
Eel River
Cape Blanco
NGA GEOnet Names Server (GNS)
Eel Canyon
Bear Valley
Mattole Canyon
Trinidad Canyon
Eel Canyon
Mendocino Ridge
Mendocino Escarpment
Mendocino Fracture Zone
Blanco Fracture Zone
Blanco Saddle
Gorda Basin
None
USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator of the dataset and in products derived from these data. This information is not intended for navigation purposes.
U.S. Geological Survey, Pacific Coastal and Marine Science Center
PCMSC Science Data Coordinator
mailing and physical
2885 Mission Street
Santa Cruz
CA
95060
831-427-4747
pcmsc_data@usgs.gov
https://www.sciencebase.gov/catalog/file/get/5e2a40a5e4b0a79317cf81b0?name=2018-658-FA_trackline_map.png&allowOpen=true
Index map of track lines
PNG
SEG-Y Rev 1
Identified as best available version
Multichannel sparker seismic reflection data were collected during USGS field activity 2018-658-FA using an 88-channel Geometrics GeoEel digital hydrophone streamer (1.5625 m and 3.25 m group spacings), a 6.4 kJ Applied Acoustics power supply, and a Delta Sparker sound source. Quality control was conducted during the collection process.
Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
Position data were provided by a Differential Global Postitioning System (DGPS) navigation receiver. A formal accuracy assessment of the horizontal positional information in the data set has not been conducted.
Depths shown in the seismic data files are in milliseconds (round trip travel time) and are referenced to sea level.
The multichannel seismic-reflection profiles were acquired with a 6.4 kJ sparker source towed at 3 meters depth below the sea surface and fired at 2.5 to 7 seconds, depending on water depth. Record lengths ranged between 2 and 7.5 seconds and were recorded in SEGD format using an 88-channel digital streamer with 1.5625 and 3.125 meter receiver group spacings, 100m total length including lead-in section, towed at 3 meters below the sea surface. Survey speeds were approximately 4.5 knots.
20181019
Seismic-reflection data were processed using Reveal seismic software by Shearwater. Processing steps included conversion from SEGD to SEGY, navigation conversion to UTM zone 10N, killing of bad channels, despike high amplitude noisy channels to twice the mean amplitude, geometry calculation for each receiver group, water column mute, FK filter, velocity picking for normal move out, trim statics to correct for swell variations along the streamer, stack, post stack migration at 1500 m/s, bandpass filter 30-70-800-100 Hz, gated gap deconvolution designed every trace, 300ms ACG, water column mute, and output to SEGY format.
20181101
Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed.
20201019
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Correction made to keywords. No data were changed. (scochran@usgs.gov)
20220525
Horizontal X and Y locations for the seismic profile locations are provided in ASCII position files and are stored in the SEG-Y data trace headers in header bytes 73 and 77.
WGS 1984 UTM Zone 10N
0.9996
-123.0
0.0
500000.0
0.0
coordinate pair
0.0001
0.0001
Meter
D WGS 1984
WGS 1984
6378137.0
298.257223563
Local surface
0.1
meters
Attribute values
Navigation and seismic shots with time stamp in standard SEG-Y file format
Society of Exploration Geophysicists (SEG) Technical Standards, available for download at http://seg.org/Publications/SEG-Technical-Standards
U.S. Geological Survey - ScienceBase
mailing and physical
Denver Federal Center, Building 810, Mail Stop 302
Denver
CO
80225
1-888-275-8747
sciencebase@usgs.gov
2018-658-FA_mcs.zip This zip file contains multichannel minisparker (SEG-Y) data collected during USGS field activity 2018-658-FA. These data are divided up and presented by navigation line, as reflected in the individual file names.
Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.
SEG-Y
SEG-Y rev 1
Zip file contains the processed seismic data per navigation line
Winzip, 7-zip, or Winrar are free software that will open .zip files
480.92
https://www.sciencebase.gov/catalog/file/get/5e2a40a5e4b0a79317cf81b0
https://doi.org/10.5066/P9R3QM97
Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download a zipped file of data and metadata. The second link points to a landing page for the entire data release.
None.
Use of SEG-Y data requires specialized software, such as Reveal by Shearwater Geophysical; ProMax and Seisworks by Landmark Geophysical; FOCUS and SeisX by Paradigm Geophysical; SPW by Parallel Geoscience; VISTA by Seismic Image Software; SeiSee by Dalmorneftegeophysica (DMNG); amongst others.
20220525
U.S. Geological Survey, Pacific Coastal and Marine Science Center
PCMSC Science Data Coordinator
mailing and physical
2885 Mission Street
Santa Cruz
CA
95060
831-427-4747
pcmsc_data@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998