Seismic Soundscape of the Parks Highway Corridor, Central Alaska
Description:
In February of 2019, 306 three-component nodal seismometers were deployed every 1 km along the Parks Highway in Alaska, from Nenana to Trapper Creek, for a period of 35 days. These nodes recorded a wide range of signals, including from local, regional, and teleseismic earthquakes, mining blasts, helicopters, planes, trains, and automobiles. Our overarching goal is to characterize the “seismic soundscape” for this region, represented by a large set of waveforms, identified by time windows and frequency windows, that are labeled by event type. Motivated by the findings of Meng and Ben-Zion (2018), we are particularly interested in characterizing the spectral signatures of various aircrafts and engine types, which is made possible by a ground-truth data set of all commercial flight paths within the time period of interest. Alaska offers an exceptional opportunity for the ground-based detection and characterization of aircrafts, because there are a wide range of different aircrafts in use in Alaska (about 100 different types for our region and time period) and because background noise levels (e.g., low car traffic, continental interior) are relatively low. Spectrograms of ground motion from passing aircrafts reveal characteristics that are unique to specific types of planes, such as plane-specific harmonics and doppler shifts. In characterizing the spectral signatures of various source types we hope to create a unique database of labeled waveforms to use as training data sets for future machine learning studies. We are currently working to establish detection thresholds and characterize spectral signatures of all signals. Our analysis is augmented by permanent seismic and infrasound stations, providing means for extrapolation outside of the 35-day time period of interest.
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: Isabella
Student Presenter: Yes
Invited Presentation:
Authors
Isabella Seppi Presenting Author Corresponding Author irseppi@alaska.edu University of Alaska Fairbanks |
Carl Tape ctape@alaska.edu University of Alaska Fairbanks |
Michael West mewest@alaska.edu University of Alaska Fairbanks |
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Seismic Soundscape of the Parks Highway Corridor, Central Alaska
Category
Advancements in Forensic Seismology and Explosion Monitoring