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Magnetotelluric Data from the San Andreas Fault, Loma Prieta CA, 1989-1990; Station mt10


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Rodriguez, B.D., Brown, P.J., Johnson, M.R., McClees-Funinan, R., Powell, A.S., and Enns, K.D., 2022, Magnetotelluric Data from the San Andreas Fault, Loma Prieta CA, 1989-1990: U.S. Geological Survey data release,


The U.S. Geological Survey (USGS) Geology, Geophysics and Geochemistry Science Center (GGGSC) collaborated with the USGS Science Analytics and Synthesis (SAS) team to preserve and release a subset of magnetotelluric data from the San Andreas Fault in Loma Prieta, California. The San Andreas Fault data were collected by the Branch of Geophysics, a precursor to the now GGGSC, between 1989 and 1994. The magnetotelluric data selected for this preservation project were collected in 1989 and 1990 using USGS portable truck mounted systems that measure the distribution of electrical conductivity beneath the surface of the earth. Truck mounted systems of this era output data to 3.5” discs, from which data were recovered and transformed to binary [...]


Attached Files

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SJ10_1cp.bin 10.75 KB application/octet-stream
SJ10_1cp.txt 20.44 KB text/plain
SJ10_2cp.bin 10.75 KB application/octet-stream
SJ10_2cp.txt 20.45 KB text/plain
SJ10_3cp.bin 10.75 KB application/octet-stream
SJ10_3cp.txt 20.46 KB text/plain
SJD10_1cp.bin 5 KB application/octet-stream
SJD10_1cp.txt 8.64 KB text/plain
SJD10_1ts.bin 13 KB application/octet-stream
SJD10_1ts.txt 34.18 KB text/plain
SJD10_2cp.bin 5 KB application/octet-stream
SJD10_2cp.txt 8.6 KB text/plain
SJD10_2ts.bin 13 KB application/octet-stream
SJD10_2ts.txt 34.78 KB text/plain
SJD10_3cp.bin 5 KB application/octet-stream
SJD10_3cp.txt 8.64 KB text/plain
SJD10_3ts.bin 13 KB application/octet-stream
SJD10_3ts.txt 34.24 KB text/plain
SJD10_4ts.bin 13 KB application/octet-stream
SJD10_4ts.txt 34.77 KB text/plain
SJD10_5ts.bin 13 KB application/octet-stream
SJD10_5ts.txt 34.72 KB text/plain
SJD10_6ts.bin 13 KB application/octet-stream
SJD10_6ts.txt 34.42 KB text/plain
SJD10_7ts.bin 13 KB application/octet-stream
SJD10_7ts.txt 35.32 KB text/plain
SJD10_8ts.bin 13 KB application/octet-stream
SJD10_8ts.txt 35.47 KB text/plain
SJD10_9ts.bin 13 KB application/octet-stream
SJD10_9ts.txt 35.1 KB text/plain
SJD10_10ts.bin 13 KB application/octet-stream
SJD10_10ts.txt 34.68 KB text/plain
SJD10_11ts.bin 13 KB application/octet-stream
SJD10_11ts.txt 34.75 KB text/plain
SJD10_12ts.bin 13 KB application/octet-stream
SJD10_12ts.txt 34.78 KB text/plain
SJD10_13ts.bin 13 KB application/octet-stream
SJD10_13ts.txt 35.89 KB text/plain
SJD10_14ts.bin 13 KB application/octet-stream
SJD10_14ts.txt 34.42 KB text/plain
SJD10_15ts.bin 13 KB application/octet-stream
SJD10_15ts.txt 35.97 KB text/plain
SJD10_16ts.bin 13 KB application/octet-stream
SJD10_16ts.txt 36.02 KB text/plain
SJD10_17ts.bin 13 KB application/octet-stream
SJD10_17ts.txt 35.8 KB text/plain
SJD10_18ts.bin 13 KB application/octet-stream
SJD10_18ts.txt 34.19 KB text/plain
SJD10_19ts.bin 13 KB application/octet-stream
SJD10_19ts.txt 35.06 KB text/plain
SJD10_20ts.bin 13 KB application/octet-stream
SJD10_20ts.txt 35.26 KB text/plain
SJD10_21ts.bin 13 KB application/octet-stream
SJD10_21ts.txt 36.85 KB text/plain
SJD10_22ts.bin 13 KB application/octet-stream
SJD10_22ts.txt 35.68 KB text/plain
SJD10_23ts.bin 13 KB application/octet-stream
SJD10_23ts.txt 34.58 KB text/plain
SJD10_24ts.bin 13 KB application/octet-stream
SJD10_24ts.txt 35.38 KB text/plain
SJL10_1cp.bin 5 KB application/octet-stream
SJL10_1cp.txt 8.06 KB text/plain
SJL10_2cp.bin 5 KB application/octet-stream
SJL10_2cp.txt 8.15 KB text/plain
SJL10_3cp.bin 5 KB application/octet-stream
SJL10_3cp.txt 8.16 KB text/plain
SJL10_4cp.bin 5 KB application/octet-stream
SJL10_4cp.txt 8.15 KB text/plain
SJL10_5cp.bin 5 KB application/octet-stream
SJL10_5cp.txt 8.14 KB text/plain
SJL10_25ts.bin 13 KB application/octet-stream
SJL10_25ts.txt 32.52 KB text/plain
SJL10_26ts.bin 13 KB application/octet-stream
SJL10_26ts.txt 31.03 KB text/plain
SJL10_27ts.bin 13 KB application/octet-stream
SJL10_27ts.txt 33.47 KB text/plain
SJL10_28ts.bin 13 KB application/octet-stream
SJL10_28ts.txt 34.6 KB text/plain
SJL10_29ts.bin 13 KB application/octet-stream
SJL10_29ts.txt 34.04 KB text/plain
“Raster plot of the phase angle and apparent resitivity for the station.”
thumbnail 165.55 KB image/png
USA-California-San_Andreas_Fault-Loma_Prieta-1989-MT10-CP_EDI.txt 920 Bytes text/plain 98.35 KB application/zip
Loma_Prieta_1989_Data_Quality_site-10.csv 3.15 KB text/csv
USA-California-San_Andreas_Fault-Loma_Prieta-1989-MT10-TS_EDI.txt 2.05 KB text/plain 501.63 KB application/zip
Loma_Prieta_1989_site-10_Config.jpg thumbnail 1.7 MB image/jpeg
Loma_Prieta_1989_site-10_Log.jpg thumbnail 1.49 MB image/jpeg


The magnetotelluric data that were previously locked in an inaccessible format are now readily available as a result of open-source software. The released information could help increase understanding of the San Andreas Fault system, which runs the length of California, as well as fault systems elsewhere. Seismic activity can pose potential hazards and great risk to communities in surrounding areas. Using the framework developed in this preservation effort to make more magnetotelluric data available will deepen our knowledge of fault systems and in turn benefit public welfare.

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