Basic Data Properties and Preliminary Results from a Dense 3C Temporary Seismic Array across the Los Angeles Basin

Fan-Chi Lin, Amir A. Allam, Heather A. Ford, & Robert W. Clayton

Published September 11, 2022, SCEC Contribution #12391, 2022 SCEC Annual Meeting Poster #264

Targeting basin and blind fault structure, we conducted a month-long temporary seismic
experiment across the Los Angeles basin in June 2022. The experiment includes a 200-station
shotgun array covering the entire basin with ~4 km spacing, and two 50-station north-south
linear arrays on the western and eastern sides of the basin with ~800 m station spacing. The
stations are three-component geophones (both Fairfield and SmartSolo) recording at 500 Hz for
~30 days. The large-scale collaborative deployment - including the University of Utah, Caltech,
and UC Riverside - was completed in a four-day period from 6/3 to 6/6, with instruments placed
in volunteer residences or in public use areas. Though attrition was high with 12 stolen and 2
damaged sensors, this experiment demonstrates the potential of community-driven seismic
research involving dense temporary arrays in urban areas. The array recorded 107 M>2.0 local
events and 35 M>5.5 teleseismic events. Here we present the basic data properties and
preliminary results, with the eventual goals of ambient noise tomography, receiver function
analysis, local event detection, and site effect characterization. We anticipate that this dataset will provide valuable new constraints on the basin and crustal structure, which will improve seismic hazard assessment of the region.

Key Words
Dense Array, Los Angeles Basin

Citation
Lin, F., Allam, A. A., Ford, H. A., & Clayton, R. W. (2022, 09). Basic Data Properties and Preliminary Results from a Dense 3C Temporary Seismic Array across the Los Angeles Basin. Poster Presentation at 2022 SCEC Annual Meeting.

Related Projects & Working Groups
SCEC Community Models (CXM)