- Title:
-
Deep-Crustal Seismic data of field activity M-1-97-SF in San
Francisco Bay from 08/31/1997 to 09/15/1997
- Abstract:
-
Chief Scientists: Pat Hart, Jon Childs. Deep-Crustal
Seismic data (seismograph, YoNav, GPS) of field activity
M-1-97-SF in San Francisco Bay from 08/31/1997 to 09/15/1997,
<http://walrus.wr.usgs.gov/infobank/m/m197sf/html/m-1-97-sf.meta.html>.
- Supplemental_Information:
-
Equipment Used -
seismograph dfs-v seismograph
YoNav
GPS Differential GPS
Notes -
See also A-1-97-SF (Auriga)
The 1997 Bay Area Seismic Imaging Experiment (BASIX-III) was the latest
in a series of USGS deep-crustal seismic reflection studies of the fault
geometry and crustal structure of the San Francisco Bay Area. The specific
goal of BASIX-III was to investigate a 15 to 25 km deep zone of
high-amplitude seismic reflectivity that has been interpreted as a possible
sub-horizontal detachment linking the San Andreas and Hayward Faults. A
twelve air gun source array, deployed from the M/V Auriga and a 2400 meter
hydrophone streamer deployed from the R/V William A. McGaw were used for
the data acquisition. The streamer was laid directly on the bay floor at
five separate locations in San Francisco, San Pablo, and Suisun Bays and
remained stationary for two days at each recording site. The air gun array
was towed past the streamer and out to offsets of 25 km and fired at
approximately 150 to 200 meter intervals. When data processing is
completed, the resulting images should better define the structural
relationship of the lower crustal reflective layer and the vertical
strike-slip faults that comprise the Pacific-North American plate boundary.
Similar information is available for thousands
of other USGS/CMG-related Activities.
If known, available are Activity-specific
navigation, gravity, magnetics, bathymetry,
seismic, and sampling data; track maps; and
equipment information; as well as summary
overviews, crew lists, and information
about analog materials.
If available, access to physical samples is
described in the "WR CMG Sample Distribution
Policy" at:
<http://walrus.wr.usgs.gov/infobank/programs/html/main/sample-dist-policy.html>
Primary access to the USGS/CMG Information
Bank's digital data, analog data, and
metadata is provided through...
<http://walrus.wr.usgs.gov/infobank/>
This page accomodates a variety of search
approaches (e.g., by platform, by region,
by scientist, by equipment type, etc.).
- How should this data set be cited?
U.S. Geological Survey (USGS) <http://www.usgs.gov/>, Coastal and Marine Geology Program (CMGP) <http://marine.usgs.gov/>, 20130331, Deep-Crustal Seismic data of field activity M-1-97-SF in San Francisco Bay from 08/31/1997 to 09/15/1997: U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>, Menlo Park, CA.
Online Links:
- What geographic area does the data set cover?
- West_Bounding_Coordinate: -122.44003
- East_Bounding_Coordinate: -122.09148
- North_Bounding_Coordinate: 38.07104
- South_Bounding_Coordinate: 37.57696
- What does it look like?
- Does the data set describe conditions during a particular time period?
- Beginning_Date: 31-Aug-1997
- Ending_Date: 15-Sep-1997
- Currentness_Reference: ground condition
- What is the general form of this data set?
- How does the data set represent geographic features?
- How are geographic features stored in the data set?
- Indirect_Spatial_Reference: San Francisco Bay
This is a Point data set.
It contains the following vector data types (SDTS terminology):
- What coordinate system is used to represent geographic features?
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude.
Latitudes are given to the nearest 0.00001.
Longitudes are given to the nearest 0.00001.
Latitude and longitude values are specified in Decimal degrees.
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is Geodetic Reference System 80.
The semi-major axis of the ellipsoid used is 6378137.
The flattening of the ellipsoid used is 1/298.257.
- Vertical_Coordinate_System_Definition:
-
- Depth_System_Definition:
-
- Depth_Datum_Name: Local surface
- Depth_Resolution: 0.1
- Depth_Distance_Units: meters
- Depth_Encoding_Method: Attribute values
- How does the data set describe geographic features?
- Entity_and_Attribute_Overview:
-
Navigation with Time Stamp <http://walrus.wr.usgs.gov/infobank/programs/html/definition/nav.html>
- Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
- Who also contributed to the data set?
Pat Hart (Chief Scientist , USGS Western Region );
Jon Childs (Chief Scientist, USGS Western Region );
Ray Sliter (Geophysicist, USGS Western Region );
Tom Parsons (Geophysicist, USGS Western Region );
Walt Olson (Mechanical Technician, USGS Western Region );
Kevin O'Toole (Mechanical Technician, USGS Western Region);
Hal Williams (Mechanical Technician, USGS Western );
Jon Childs (Chief Scientist, Region USGS Western Region );
Dave Hogg (Electrical Technician, USGS Western Region );
Bill Robinson (Electrical Engineer, USGS Western Region );
Jeff Brody (Computer Specialist, USGS Western Region);
Dennis Mann (Data Curator, USGS Western Region);
Steve Wessels (Photographer, USGS Western Region );
Bill Cooperwat (Geologist, Stanford);
Diane Minasian (Geologist, USGS Western Region);
Terence Shinn (Ship Captain);
Dave (Chief Engineer);
Steve Bean (Chief Mate);
Mary Nichols (Cook)
- To whom should users address questions about the data?
These data and information are intended for science
researchers, students from elementary through
college, policy makers, and general public.
- From what previous works were the data drawn?
- How were the data generated, processed, and modified?
- Date: 11-Jul-2000 (process 1 of 1)
-
Navigation Data
time/lat/long style, multi-record, in caps
temporal-spatial data
data acquisition systems
1 2 3
3456789012345678901234567890123456
Person who carried out this activity:
- What similar or related data should the user be aware of?
U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>, Unknown, USGS/CMG Information Bank <http://walrus.wr.usgs.gov/infobank/>: U.S. Geological Survey (USGS) <http://www.usgs.gov> Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>, Menlo Park, CA.
Online Links:
- How well have the observations been checked?
Identified as best available version.
- How accurate are the geographic locations?
Unspecified
- How accurate are the heights or depths?
Unspecified
- Where are the gaps in the data? What is missing?
Start and end date/times of data
Navigation Data (m-1-97-sf.060 [GPS])
YYYYMMDDHHMMSST YYYYMMDDHHMMSST
199708311615304 199708312259208
199708312308500 199708312316507
199709010255004 199709010511407
199709010527102 199709010529309
199709020725101 199709020737507
199709022159200 199709030022208
199709030103301 199709030136104
199709031806303 199709040038205
199709041809103 199709041814007
199709041826301 199709041849000
199709051900407 199709052216105
199709061448500 199709061559005
199709061610203 199709061612005
199709061627002 199709070117105
199709091431501 199709091735409
199709092158101 199709100021501
199709101554404 199709101638106
199709101803201 199709102009500
199709111728400 199709111733505
199709121514102 199709121958505
199709122007303 199709122208107
199709131820200 199709132207006
199709140227203 199709140228009
199709141915304 199709141936007
199709142039101 199709142212007
199709151202300 199709151330402
199709151346304 199709151502406
YYYYMMDDHHMMSST YYYYMMDDHHMMSST
- How consistent are the relationships among the observations, including topology?
Unspecified
Are there legal restrictions on access or use of the data?
- Access_Constraints:
-
Physical materials are under controlled on-site access.
If available, access to physical samples is described
in the "WR CMG Sample Distribution Policy" at:
<http://walrus.wr.usgs.gov/infobank/programs/html/main/sample-dist-policy.html>
- Use_Constraints:
-
Please recognize the U.S. Geological Survey (USGS) as
the source of this information.
Physical materials are under controlled on-site access.
Some USGS information accessed through this means
may be preliminary in nature and presented without
the approval of the Director of the USGS. This
information is provided with the understanding
that it is not guaranteed to be correct or complete
and conclusions drawn from such information are
the responsibility of the user.
This information is not intended for navigational
purposes.
Any use of trade, firm, or product names is for
descriptive purposes only and does not imply
endorsement by the U.S. Government.
- Who distributes the data set? (Distributor 1 of 1)
- What's the catalog number I need to order this data set?
Downloadable Data M-1-97-SF data set <http://walrus.wr.usgs.gov/infobank/m/m197sf/html/m-1-97-sf.meta.html>
- What legal disclaimers am I supposed to read?
Please recognize the U.S. Geological Survey (USGS) as
the source of this information.
Physical materials are under controlled on-site access.
Some USGS information accessed through this means
may be preliminary in nature and presented without
the approval of the Director of the USGS. This
information is provided with the understanding
that it is not guaranteed to be correct or complete
and conclusions drawn from such information are
the responsibility of the user.
This information is not intended for navigational
purposes.
Any use of trade, firm, or product names is for
descriptive purposes only and does not imply
endorsement by the U.S. Government.
- How can I download or order the data?
- Availability in digital form:
- Cost to order the data: None
- Dates:
- Last modified: 31-Mar-2013
- Metadata author:
-
- Metadata standard:
- FGDC Content Standards for Digital Geospatial Metadata <http://www.fgdc.gov/> (FGDC-STD-001-1998 <http://www.its.nbs.gov/nbs/meta/meta.html>)
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