CSN-LAUSD Network: A Dense Accelerometer Network in Los Angeles Schools
The Community Seismic Network‐Los Angeles Unified School District is a network of 300 low‐cost microelectromechanical systems accelerometers located in schools in the Los Angeles, California, region. They are capable of accurately recording strong motion up to ±2g and are sufficiently spatially dense that they provide unaliased measurements of strong motions up to 1 Hz following a major earthquake. They are used to provide state‐of‐health monitoring for the schools and surrounding communities to guide the emergency response. As a research tool, they can be used to provide estimates of the site response at the schools and, therefore, provide a much denser set of site responses for ground‐motion prediction than is currently available.
© 2019 Seismological Society of America. Published Online 13 November 2019. Data and Resources: Data from felt and interesting events are available at http://csn.caltech.edu/data/ along with the recordings of other Community Seismic Network (CSN) stations. In particular the data of the Ridgecrest earthquake shown in Figures 3, 5, 6, 7 and S1 are archived there. The continuous data from the CSN network are not generally released due to privacy concerns, but we are attempting to obtain permission for the Los Angeles Unified School District (LAUSD) stations. The VS30 measures in the region of LAUSD are available from https://earthquake.usgs.gov/data/vs30. The client software is available at https://github.com/jjbunn/PyCSN. More information on the CSN and CSN‐LAUSD networks is available at http://csn.caltech.edu (last accessed July 27, 2019). The Raspberry Shake network can be accessed at https://raspberryshake.org. Details on the Phidget sensor are available at https://www.phidgets.com/?&prodid=31. All websites were last accessed on July 2019. The supplemental material includes movies of ground accelerations due to the 6 July 2019 M7.1 Ridgecrest earthquake are shown in Figure S1. The time slices shown in Figure 6 are one panel from each of the videos. The data have been bandpass filtered from 100‐1 s and 100‐5 s. The movie starts at 60 s after the origin time and runs until 92 s. The authors thank the Betty and Gordon Moore Foundation, Caltech, the Conrad N. Hilton Foundation, and Computers and Structures, Inc., for funding for this project. The authors thank Los Angeles Unified School District (LAUSD), and in particular Jill Barnes, for facilitating this project, and the many volunteers who have helped build the Community Seismic Network (CSN) sensors. Charles Dorn and Filippos Filippitzis from Caltech created Figures 4 and 7, respectively.
Accepted Version - SRL-2019200_Galley_Final.pdf
Supplemental Material - srl-2019200_supplement.docx
Supplemental Material - srl-2019200_supplement_movie-1sec.mpg
Supplemental Material - srl-2019200_supplement_movie-5sec.mpg
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