Although stand‐alone geophones have been used for decades within the active‐source seismic community (e.g., Mooney and Brocher, 1987), recent technological advances in geophone instrumentation have made it possible to use them for a wide range of passive seismic studies (e.g., Lin et al., 2013; Schmandt and Clayton, 2013). Compact, all‐in‐one seismic systems including a geophone, digitizer, and battery—often called nodes—are lightweight and easy to deploy, allowing large numbers of instruments (“large‐N,” typically 100s or 1000s of nodes) to be used on a single project. These stand‐alone seismic systems, especially the RefTek 125A Texan seismometer...

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