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Amploc: A complete Python workflow for amplitude-based locations

August 26, 2026

Amplitude‐based locations are well suited for characterizing long‐duration seismic sources that may migrate with time, such as debris flows, avalanches, rockfall, and volcanic tremor. Although amplitude‐based location methods have existed for decades, their adoption in real‐time monitoring systems remains limited. We present a complete Python‐based workflow that includes station corrections, amplitude‐based location algorithms, and interactive review tools that are appropriate for real‐time use. The algorithms themselves are not new; however, Amploc integrates several previously published methods into a unified operational framework. The workflow also introduces a browser‐based graphical interface that allows users to review real‐time location results using formats familiar to many observatories. By integrating calibration, location algorithms, and visualization tools, Amploc lowers the barrier to operational use of amplitude‐based locations and improves characterization of phenomena that inform hazard assessments such as long‐period earthquakes, volcanic tremor, and debris flows.

Publication Year 2026
Title Amploc: A complete Python workflow for amplitude-based locations
DOI 10.1785/0220260128
Authors Weston Thelen, Noah Mcgregor Harper
Publication Type Article
Publication Subtype Journal Article
Series Title Seismological Research Letters
Index ID 70280356
Record Source USGS Publications Warehouse
USGS Organization Volcano Science Center
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