Establishing the types and durations of non-earthquake sources of energy in continuous waveform records is essential to developing the correct understanding and cataloging of different classes of sources of ground motion. Natural and anthropogenic noise recorded throughout seismic networks contains information from multiple sources. Seismic station coverage continues to improve with the expansion of permanent networks and temporary installation of dense deployments. This trend and improved techniques for detecting small earthquakes and tremor increases the need to properly decipher transient signals in the waveforms. As temporary dense seismic deployments of geophones with high sampling rates (e.g. 500 Hz) become more common in implementing scientific research objectives [e.g. Schmandt and Clayton, 2013; Inbal et al., 2015; Brenguier et al., 2016], the need to develop systematic tests that quantify the coupling of atmospheric and surface processes to the solid Earth are necessary to further the understanding of transient seismic signals. We aim to characterize the coupling of wind to a variety of common in-situ structures (house, machines, poles, fences) located in the study area containing a dense array of geophones. The goal is to quantify the meteorological measurements and types of structures producing seismic signals that appear without careful characterization as possible seismic activity. The outcome will advance the understanding of different classes of sources that contribute to recorded seismic waveforms and the near-surface mechanical properties that allow the propagation of wind-related signals in the damage structure of the SJFZ. The proposed work consists of a one year project plan that involves three components:
(1) Deploy 30-50 high frequency geophones and 2 meteorological stations to record the wind speed and direction, atmosphere pressure and temperature for ~30 days at the Sage Brush Flat site, south of Anza, CA in the trifurcation area of the San Jacinto fault zone [Allam et al., 2014; Ben-Zion et al., 2015]. The seismic sensors will be 3-component Zland geophones similar to those previously deployed to maintain data consistency between the studies. The deployment will require two trips to the SGB field location, one to install the equipment and one for removal. The instruments will be installed to simultaneously measure the ground motions and the motions of structures and equipment located on site (Figure 2b). Affixing geophones to...