Processed, high-resolution, chirp seismic-reflection data collected in San Pablo Bay (northern California) during field activity 2014-639-FA from 10/06/2014 to 10/10/2014

Seismic-reflection SEG-Y files were sub-sampled at twice the sample interval, using Echos software, to make swell correction more effective. Results were exported as a new SEG-Y file.

Selected SEG-Y files were displayed using Kingdom Suite software and the water bottom was picked along each profile where seafloor relief was minimal. Swell corrections were calculated based on the water bottom horizon, and applied to the sub-sampled SEG-Y files using Sioseis software (see: http://sioseis.ucsd.edu/procs.html). Results were exported as a new SEG-Y. Note, if the sea state was flat, no swell correction was applied (lines: 2,3,5,8,9,14), and portions of some profiles were NOT swell-filtered b/c of seafloor relief. Where there is seafloor relief (i.e. ripples, sandwaves), if you were to apply a swell correction, you would introduce inaccurate shifts to the subsurface reflectors that were NOT the result of only sea-surface swell.

Predictive deconvolution was applied using Sioseis software to the swell-corrected SEG-Y files, using the whole trace with a 0.2 ms gap. A 15-trace mix was applied and the results were exported as a new SEG-Y file.

Online_Linkage and Network_Resources URLs were corrected. In addition, edits were made as needed to bring the metadata up to current PCMSC standards including standardizing doi# links, and correcting typos. Point of Contact and Metadata Contact information sections were changed to static PCMSC contact information. No data were changed. Users are advised to compare the metadata date of this file to any similar file to ensure they are using the most recent version.

Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed.