Identifying Different Classes of Seismic Noise Signals Using Unsupervised Learning
Abstract
Abstract Proper classification of nontectonic seismic signals is critical for detecting microearthquakes and developing an improved understanding of ongoing weak ground motions. We use unsupervised machine learning to label five classes of nonstationary seismic noise common in continuous waveforms. Temporal and spectral features describing the data are clustered to identify separable types of emergent and impulsive waveforms. The trained clustering model is used to classify every 1 s of continuous seismic records from a dense seismic array with 10–30 m station spacing. We show that dominate noise signals can be highly localized and vary on length scales of hundreds of meters. The methodology demonstrates the complexity of weak ground motions and improves the standard of analyzing seismic waveforms with a low signal‐to‐noise ratio. Application of this technique will improve the ability to detect genuine microseismic events in noisy environments where seismic sensors record earthquake‐like signals originating from nontectonic sources.
- Authors:
-
- Scripps Institution of Oceanography University of California, San Diego San Diego CA USA, Now at Los Alamos National Laboratory Los Alamos NM USA
- Department of Earth Sciences University of Southern California Los Angeles CA USA
- Scripps Institution of Oceanography University of California, San Diego San Diego CA USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1644360
- Grant/Contract Number:
- DE‐SC0016520; DE‐SC0016527
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Geophysical Research Letters
- Additional Journal Information:
- Journal Name: Geophysical Research Letters Journal Volume: 47 Journal Issue: 15; Journal ID: ISSN 0094-8276
- Publisher:
- American Geophysical Union (AGU)
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Johnson, Christopher W., Ben‐Zion, Yehuda, Meng, Haoran, and Vernon, Frank. Identifying Different Classes of Seismic Noise Signals Using Unsupervised Learning. United States: N. p., 2020.
Web. doi:10.1029/2020GL088353.
Johnson, Christopher W., Ben‐Zion, Yehuda, Meng, Haoran, & Vernon, Frank. Identifying Different Classes of Seismic Noise Signals Using Unsupervised Learning. United States. https://doi.org/10.1029/2020GL088353
Johnson, Christopher W., Ben‐Zion, Yehuda, Meng, Haoran, and Vernon, Frank. Mon .
"Identifying Different Classes of Seismic Noise Signals Using Unsupervised Learning". United States. https://doi.org/10.1029/2020GL088353.
@article{osti_1644360,
title = {Identifying Different Classes of Seismic Noise Signals Using Unsupervised Learning},
author = {Johnson, Christopher W. and Ben‐Zion, Yehuda and Meng, Haoran and Vernon, Frank},
abstractNote = {Abstract Proper classification of nontectonic seismic signals is critical for detecting microearthquakes and developing an improved understanding of ongoing weak ground motions. We use unsupervised machine learning to label five classes of nonstationary seismic noise common in continuous waveforms. Temporal and spectral features describing the data are clustered to identify separable types of emergent and impulsive waveforms. The trained clustering model is used to classify every 1 s of continuous seismic records from a dense seismic array with 10–30 m station spacing. We show that dominate noise signals can be highly localized and vary on length scales of hundreds of meters. The methodology demonstrates the complexity of weak ground motions and improves the standard of analyzing seismic waveforms with a low signal‐to‐noise ratio. Application of this technique will improve the ability to detect genuine microseismic events in noisy environments where seismic sensors record earthquake‐like signals originating from nontectonic sources.},
doi = {10.1029/2020GL088353},
journal = {Geophysical Research Letters},
number = 15,
volume = 47,
place = {United States},
year = {Mon Aug 03 00:00:00 EDT 2020},
month = {Mon Aug 03 00:00:00 EDT 2020}
}
https://doi.org/10.1029/2020GL088353
Web of Science
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