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Patton Seismicity
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2015
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Robert Gordon Sproul
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Project Title: |
Constraining seismicity on the Patton Escarpment and testing of next-generation ocean-bottom seismology instrumentation. A University of California Ship Funds proposal. |
Project Status: |
Submitted |
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Principal Investigator: |
Adrian Doran, UCSD |
Project Institution: |
UCSD |
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Project ID: |
104645 |
Version #: |
2 |
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Date Submitted: |
12/2/2014 12:05:00 PM |
Created By: |
Adrian Doran |
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Date Last Modified: |
4/10/2015 2:21:00 PM |
URI Serial #: |
None |
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Funding Agencies: |
INST/UCSD/SIO - NONE - Funded |
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Summary of Field Work: |
Characterization of local seismicity and the ambient noise spectrum on the Patton Escarpment, offshore southern California, as well as development of next-generation ocean-bottom seismology instrumentation.
This project will be comprised of three primary objectives. First, we will continue testing of the Autonomously Deployed Deep-Ocean Seismic System (ADDOSS) project by providing a three-month deep-water testing site to complete the proof-of-concept. Second, we will deploy three OBS packages around the Patton Escarpment, an understudied region at the edge of the California Borderlands that could potentially contain significant seismic activity. Third, we will conduct an echo-sounding survey on a 10km line to image the subsurface sediments. The results of our ongoing seafloor compliance study in the region contrasts sharply with the results of a previous Deep Sea Drilling Project well, and this survey will allow us to image subsurface sediment variations that are crucial to our interpretation.
The work will be divided into two cruises, each three days and separated by three months. The first cruise will deploy all of the seismic instruments. The second cruise will be used for recovery, and will also conduct the echo-sounding survey. The cruises are scheduled to maximize the data recording window, as well as to record data during the period with as little background noise contamination as possible. |
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Summary of Facility Requirements: |
We will use the Knudsen 3260 3.5 kHz chirp system currently installed on the R/V Robert Gordon Sproul for a 10km echo-sounding survey. We will also deploy four ocean-bottom seismometer (OBS) packages furnished by the ocean-bottom seismometer instrument pool (OBSIP) for three months. The R/V Sproul has adequate storage space, A-frame, deck space, and equipment to facilitate this study. |
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Summary of other requirements and comments: |
This proposal is pending funding approval from the UC Ship Funds program, and will support graduate research, data collection, and instrumentation. |
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Type of Request: |
Primary Ship Use |
Request Status: |
Submitted |
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Request ID: |
1007433 |
Created By: |
Adrian Doran |
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Date Last Modified: |
4/10/2015 2:21:00 PM |
Date Submitted: |
12/2/2014 12:05:00 PM |
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Year: |
2015
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Ship/Facility: |
Robert Gordon Sproul
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Optimum Start Date:
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6/20/2015 |
Dates to Avoid: |
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Earliest Start Date: |
2/1/2015 |
Multi-Ship Op: |
No |
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Latest Start Date: |
9/1/2015 |
Other Ship(s): |
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Operating Days Needed: |
Science Days |
Mob Days |
De-Mob Days |
Estimated Transit Days |
Total Days |
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2 |
0 |
0 |
1 |
3 |
Repeating Cruise?
(within same year) |
Yes |
Interval: |
Two three-day cruises |
# of Cruises: |
2 |
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Description of Repeating cruise requirements: |
We request two three-day cruises, separated by approximately three months for instrument deployment. This allows for the maximum time to record data while minimizing the background noise contamination at our sites. The optimal deployment period is from June to September, but the dates are flexible. |
Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations: |
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Short Description of Op Area
for use in schedules: |
Cal. Borderland |
| Description of Op Area: |
Patton Escarpment, edge of continental shelf offshore California |
| Op Area Size/Dia.: |
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Lat/Long |
Marsden Grid |
Navy Op Area |
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Beginning
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32.71° N
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117.162° W
map
32° 42.6' N
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117° 9.72' W
map
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Ending
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32.71° N
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117.162° W
map
32° 42.6' N
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117° 9.72' W
map
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Show Degrees Minutes |
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Foreign Clearance Required? |
No |
Coastal States:
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 Important Info on Foreign Research Clearances
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Are you or any member in your science party bringing in any science equipment items which are regulated for export by the International Traffic in Arms Regulations (ITAR) and/or the Export Administration Regulations (EAR)?
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No |
If yes, have you applied for the necessary permits through your export control office?
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No |
| Questions about ITAR/EAR regulations?
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Comments about foreign clearance requirements or
description of any other special permitting requirements
(e.g., MMPA, ESA, IHA, Marine Sanctuaries, etc.) |
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Requested Start Port |
Intermediate Port(s) |
Requested End Port |
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San Diego, CA, USA |
None |
San Diego, CA, USA |
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops |
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Important Info on Working in Foreign Ports
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Chief Scientist: |
Adrian Doran, UCSD |
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# in Science Party |
7 |
# of different science teams |
1 |
# Marine Technicians to be
provided by ship operator:
(include in science party total)
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2 |
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Explanation of Science Party Requirements and Technician Requirements |
The scientific party will consist of the PI, the faculty advisors, and three engineers: one to operate the Knudsen echo-sounder, one to prepare the OBS deployment, and one to operate the electronics. |
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 Dynamic Positioning | ADCP | Multibeam | Seismic |
| Dredging/Coring/Large Dia. Trawl Wire | Stern A-frame | Fiber Optic (.681) | 0.680 Coax Wire |
| SCUBA Diving | Radioisotope use - briefly describe | NO Radioisotope use/Natural level work | Other Operator Provided Inst. - Describe |
| 0 PI-Provided Vans - briefly describe | MOCNESS | | |
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Explain Instrumentation or Capability
requirements that could affect choice
of ship in scheduling. |
We require use of the Knudsen 3260 3.5 kHz echo sounder, which is already installed on the R/V Robert Gordon Sproul. We will also use OBS packages provided by OBSIP.
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Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems. |
OBSIP, partially run by SIO, will furnish the required OBS packages for this project. |
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