Far-Field DAS Recordings of a Chemical Explosion
Description:
On October 18, 2023 an underground chemical explosion was detonated at the P Tunnel of the Nevada National Security Site (NNSS). The experiment used a broad suite of sensors to detect the motion the of chemical explosion . Part of the ground motion network included a past DAS fiber deployment located approximately 14 km southeast of P Tunnel. Helically wound fiber with a 60-degree wrapping angle was installed two vertical boreholes (E80 and SW80) at the Dry Alluvium Geology (DAG) site during Phase II of the Source Physics Experiment in 2018. During the 2023 experiment, a Silixa Carina interrogator was used to record DAS measurements in the 385m deep E80 hole. Data were sampled at 1kHz with a 2-meter gauge length and 1 meter channel spacing. Starting at approximately 3.1 seconds after the explosion was detonated several upcoming wave phases are observed followed by a train of surface waves. This observation is consistent with predictions made prior to the experiment. This is the first time that DAS has been used to monitor chemical explosion experiments at a distance greater than a few 100 meters. We present a comparison of the predicted strain-rates and travel-times to the measured data.
Session: Advancements in Forensic Seismology and Explosion Monitoring [Poster Session]
Type: Poster
Date: 5/2/2024
Presentation Time: 08:00 AM (local time)
Presenting Author: James
Student Presenter: No
Invited Presentation:
Authors
James St. Clair Presenting Author Corresponding Author james.stclair@pnnl.gov Pacific Northwest National Laboratory |
Kirsten Chojnicki kirsten.chojnicki@pnnl.gov Pacific Northwest National Laboratory |
Parker Sprinkle parker.sprinkle@pnnl.gov Pacific Northwest National Laboratory |
James Ely james.ely@pnnl.gov Pacific Northwest National Laboratory |
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Far-Field DAS Recordings of a Chemical Explosion
Category
Advancements in Forensic Seismology and Explosion Monitoring