Two-dimensional Electrical Resistivity Model from San Pablo Bay, California

Dates

Publication Date: 2020-04-10
Start Date: 2015-10-05
End Date: 2015-10-09

Citation

Peacock, J.R., Ponce, D.A., Watt, J.T., and K.M., Denton, 2020, Magnetotelluric data from San Pablo Bay, California: U.S. Geological Survey data release, https://doi.org/10.5066/P96T27UM.

Summary

Included here are the model, data, and reponse files used to create the 2D electrical resistivity model. Plots of the data and model response are provided as well as one of the model. The data, model, mesh, regularization, and response files are provided in Occam2D format. See https://marineemlab.ucsd.edu/Projects/Occam/2DMT/index.html for details on file format. This data product includes Occam2D data, model, response, and mesh files such that anyone can reproduce the model results. To produce the 2D model the data are rotated to principle strike direction estimated from the phase tensor azimuth, which was nominaly geomagnetic north. The station locations are projected onto a profile line N66E. Bad data points are removed by hand. [...]

Summary

Included here are the model, data, and reponse files used to create the 2D electrical resistivity model. Plots of the data and model response are provided as well as one of the model. The data, model, mesh, regularization, and response files are provided in Occam2D format. See https://marineemlab.ucsd.edu/Projects/Occam/2DMT/index.html for details on file format. This data product includes Occam2D data, model, response, and mesh files such that anyone can reproduce the model results. To produce the 2D model the data are rotated to principle strike direction estimated from the phase tensor azimuth, which was nominaly geomagnetic north. The station locations are projected onto a profile line N66E. Bad data points are removed by hand. Only the TM and induction vectors are inverted to remove 3D effects that might occur from being so close to the coast. The starting model was a homogeneous half-space of 10 Ohm-m. The inversion ran for 20 iterations where the 10th iteration was deemed to be the optimum based on an L-curve of roughness versus root-mean-squared error. The final normalize root-mean-squared error is 1.98 using errors of 10% for the apparent resistivity, 1.5 degrees for the phase and 0.2 for the induction vectors. The final relative roughness is 174.

Contacts

Point of Contact :: Jared R. Peacock, U.S. Geological Survey
Originator :: Jared R. Peacock, Kevin M. Denton, David A. Ponce
Metadata Contact :: Jared R. Peacock, U.S. Geological Survey
Publisher :: U.S. Geological Survey
Data Owner :: Geology, Minerals, Energy, and Geophysics Science Center
Distributor :: U.S. Geological Survey - ScienceBase

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SP01_resp.png		216.35 KB	image/png
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SP07_resp.png		176.72 KB	image/png
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SP12_resp.png		196.44 KB	image/png
SP13_resp.png		208.85 KB	image/png
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SP15_resp.png		172.2 KB	image/png
spb_2d_model.xml Original FGDC Metadata	View	17.79 KB	application/fgdc+xml
spb_occam2d_files.zip “Occam2D files”		80.32 KB	application/zip
spb_resistivity_model_2d.png “2D electrical resistivity model”		122.13 KB	image/png