Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: PhaseLink: A Deep Learning Approach to Seismic Phase Association   Seismic phase association is a fundamental task in seismology that pertains
to linking together phase detections on different sensors that originate from a
common earthquake. It is widely employed to detect earthquakes on permanent and
temporary seismic networks, and underlies most seismicity catalogs produced
around the world. This task can be challenging because the number of sources is
unknown, events frequently overlap in time, or can occur simultaneously in
different parts of a network. We present PhaseLink, a framework based on recent
advances in deep learning for grid-free earthquake phase association. Our
approach learns to link phases together that share a common origin, and is
trained entirely on tens of millions of synthetic sequences of P- and S-wave
arrival times generated using a simple 1D velocity model. Our approach is
simple to implement for any tectonic regime, suitable for real-time processing,
and can naturally incorporate errors in arrival time picks. Rather than tuning
a set of ad hoc hyperparameters to improve performance, PhaseLink can be
improved by simply adding examples of problematic cases to the training
dataset. We demonstrate the state-of-the-art performance of PhaseLink on a
challenging recent sequence from southern California, and synthesized sequences
from Japan designed to test the point at which the method fails. For the
examined datasets, PhaseLink can precisely associate P- and S-picks to events
that are separated by ~12 seconds in origin time. This approach is expected to
improve the resolution of seismicity catalogs, add stability to real-time
seismic monitoring, and streamline automated processing of large seismic
datasets.

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The categories of this paper are: econ
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
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The categories of this paper are: gr-qc
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The categories of this paper are: astro-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: atom-ph
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The categories of this paper are: q-fin
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The categories of this paper are: math-ph
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The categories of this paper are: math
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The categories of this paper are: funct-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-th