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Session: Urban Seismology [Poster]

Type: Poster

Date: 10/9/2024

Time: 07:00 AM

Room: Stanley Park Ballroom

A Corpus of Signals From a 12-month DAS Experiment at Southern Methodist University

Since August 2023, we have been continuously experimenting with DAS capabilities on the Southern Methodist University (SMU) campus using 2-10 km long commercial dark fiber with an OptaSense QuantX Strain Interrogator Unit (IU). During this period, we have recorded a variety of seismoacoustic signals, including natural events (e.g., earthquakes, thunderstorms) and anthropogenic signals (e.g., rotary subwoofer, vehicular movements, building demolitions, football games). All these records are well recorded in a wide frequency range of 0.01-250 Hz at a spatial spacing of 1-2 m with a gauge length of 4-16 m. The recorded signals are clearly visible in Frequency-Wavenumber (F-K) transform plots that are utilized to calculate apparent velocities. For several events, infrasound and conventional broadband measurements were made alongside the DAS measurements, enabling us to explore coupling effects. This presentation summarizes the variety of signals we have detected and explores some applications of the signals for exploring source and path.

Presenting Author: Stephen

Additional Authors