Amploc: A Complete Python Workflow for Amplitude-Based Locations

Abstract 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.

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Publication Details

Journal
Seismological Research Letters
Published
2026-08-28
DOI
https://doi.org/10.1785/0220260128
Primary Topic
Seismology and Earthquake Studies
Type
article
Field-Weighted Citation Impact
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article

Amploc: A Complete Python Workflow for Amplitude-Based Locations

W. A. Thelen, Noah Harper
Seismological Research Letters
Seismology and Earthquake Studies
article

Amploc: A Complete Python Workflow for Amplitude-Based Locations

W. A. Thelen, Noah Harper
article en

Abstract

Abstract 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.

Seismological Research Letters
Cascades Volcano Observatory (US)
Openalex Percentile: Top 8%
Seismology and Earthquake Studies
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Amploc: A Complete Python Workflow for Amplitude-Based Locations — W. A. Thelen, Noah Harper · Seismological Research Letters (2026) | TGRS Research Map | TGRS