LOC-FLOW is an “hands-free” earthquake location workflow to process continuous seismic records

Miao Zhang

Last update: Jan 9, 2023

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Overview

LOC-FLOW

Earthquake Location Workflow

LOC-FLOW is an “hands-free” earthquake location workflow to process continuous seismic records: from raw waveforms to well located earthquakes with magnitude calculations. The package assembles several popular routines for sequential earthquake location refinements, suitable for catalog building ranging from local to regional scales.

The LOC-FLOW is released and maintained at https://github.com/Dal-mzhang/LOC-FLOW.

How to start? bash run_all.sh. Detailed step-by-step explanations can be found in the CookBook and corresponding scripts.

Dependent packages in LOC-FLOW includes PhaseNet [contains Obspy], REAL, VELEST, HYPOINVERSE, hypoDD, GrowClust, FDTCC, Match&Locate; see [STEP 0 in the CookBook or src]. Questions related to the original packages should be addressed to the corresponding authors.

All other credits to Miao Zhang (also author of REAL and Match&Locate), Min Liu (also author of FDTCC), and Tian Feng, who integrated these packages and made the I/O codes publicly available. We thank Weiqiang Zhu for help with the PhaseNet. The CookBook is prepared by Ruijia Wang and Miao Zhang.

Users are free to make modifications to the programs to meet their particular needs, but are discouraged from distributing modified code to others without notification of the authors. If you find any part of the workflow useful, please cite our work or the corresponding publications of the packages.

Please download (src/software_download.py) and regularly check source code updates: PhaseNet: https://github.com/wayneweiqiang/PhaseNet; REAL: https://github.com/Dal-mzhang/REAL; FDTCC: https://github.com/MinLiu19/FDTCC; hypoDD: https://www.ldeo.columbia.edu/~felixw/hypoDD.html; GrowClust: https://github.com/dttrugman/GrowClust; Match&Locate: https://github.com/Dal-mzhang/MatchLocate2; HYPOINVERSE: https://www.usgs.gov/software/hypoinverse-earthquake-location

Questions and comments? Email Miao Zhang ([email protected])

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Comments

Update runphasenet.py
Address comments:

Line 39 of runphasenet.py It reported an error when handling single digit day of month and month of year (in my case, Jan. 3, for example). I therefore changed to

data["ss"] = data["begin_time"].apply(lambda x: (x - datetime.fromisoformat(datetime(x.year,x.month,x.day).strftime("%Y-%m-%d"))).total_seconds())

Line 41 of runphasenet.py I noticed this error because of the inconsistent indices between "data" after removing picks with low probability and the panda series "dum", which results in a null column in the final picks' files. I changed to

dum = pd.Series(np.ones(len(data))); dum.index = data.index; data["dum"] = dum
opened by zhuwq0 0

Releases(v0.0.1)

v0.0.1(Jan 19, 2022)

LOC-FLOW is an “hands-free” earthquake location workflow to process continuous seismic records: from raw waveforms to well located earthquakes with magnitude calculations. The package assembles several popular routines for sequential earthquake location refinements, suitable for catalog building ranging from local to regional scales.

The LOC-FLOW is released and maintained at https://github.com/Dal-mzhang/LOC-FLOW.

How to start? bash run_all.sh. Detailed step-by-step explanations can be found in the CookBook and corresponding scripts.

Dependent packages in LOC-FLOW include PhaseNet [contains Obspy], REAL, VELEST, HYPOINVERSE, hypoDD, GrowClust, FDTCC, Match&Locate; see [STEP 0 in the CookBook or src]. Questions related to the original packages should be addressed to the corresponding authors.

All other credits to Miao Zhang (also author of REAL and Match&Locate), Min Liu (also author of FDTCC), and Tian Feng, who integrated these packages and made the I/O codes publicly available. We thank Weiqiang Zhu for help with the PhaseNet. The CookBook is prepared by Ruijia Wang and Miao Zhang.

Users are free to make modifications to the programs to meet their particular needs, but are discouraged from distributing modified code to others without notification of the authors. If you find any part of the workflow useful, please cite our work or the corresponding publications of the packages.

Please download (src/software_download.py) and regularly check source code updates: PhaseNet: https://github.com/wayneweiqiang/PhaseNet; REAL: https://github.com/Dal-mzhang/REAL; FDTCC: https://github.com/MinLiu19/FDTCC; hypoDD: https://www.ldeo.columbia.edu/~felixw/hypoDD.html; GrowClust: https://github.com/dttrugman/GrowClust; Match&Locate: https://github.com/Dal-mzhang/MatchLocate2; HYPOINVERSE: https://www.usgs.gov/software/hypoinverse-earthquake-location
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