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Earth, Planets and Space
Fig. 1 | Earth, Planets and Space

Fig. 1

From: Cross-validation of independent ultra-low-frequency magnetic recording systems for active fault studies

Fig. 1

Location map of the greater Bay Area, California (CA) with hill-shaded topography. Blue square: USGS-Stanford permanent electromagnetic observatory and QuakeFinder temporary magnetic systems at Jasper Ridge Biological Preserve (JRSC); pink circle: USGS Fresno (FRN) magnetic station (in inset); green circles: QuakeFinder permanent EM stations in San Francisco Bay Area; red circles: other USGS-Stanford EM stations MHDL and BRIB. Gray and black lines: faults. Red and blue lines: electric trains, respectively, BART tracks and VTA light rail

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