CMT Solutions

This repository contains the Centroid Moment Tensor (CMT) solutions and supporting tools used for the John Townend relocation / CMT study.

Contents

• cmt_solutions/ — Python package with helpers for reading and working with CMT solution data (includes cmt_data.py, nodal_plane.py, etc.).
• data/ — CSV datasets (e.g. CMT_solutions.csv) used by the code and reviewer app.
• interfaces/ — Streamlit UI for reviewing nodal planes (cmt_reviewer.py).
• scripts/ — utility scripts used to build or update datasets.
• wiki/ — documentation pages including the CMT review guide and the John Townend study notes.

Quick links (wiki)

• CMT Review guide: wiki/CMT Review.md
• John Townend CMT study notes: wiki/John Townend CMT Study.md
• Home (scripts summary): open wiki/Home.md for descriptions of the scripts in scripts/.

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Install

We recommend using a new Python virtual environment. From the repository root (the directory containing pyproject.toml / setup.py) install editable mode so the package is importable during development and by the Streamlit app:

python -m venv .venv
source .venv/bin/activate
python -m pip install --upgrade pip
python -m pip install -e .
python -m pip install -r requirements.txt

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Running the Streamlit reviewer

From the repo root:

cd interfaces
streamlit run cmt_reviewer.py

Open the URL printed by Streamlit (usually http://localhost:8501). The wiki/CMT Review.md file contains a user guide for the reviewer UI and describes the steps to perform and save reviews.

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Using the Python API

This repository exposes a small API for loading and working with the CMT data. The main helper for loading the data is get_cmt_data() in cmt_solutions/cmt_data.py.

Example: load all CMT solutions

from cmt_solutions.cmt_data import get_cmt_data

df_all = get_cmt_data()  # returns a pandas.DataFrame with the full contents of data/CMT_solutions.csv
print(len(df_all), "rows loaded")

Example: load a single event by PublicID

from cmt_solutions.cmt_data import get_cmt_data

df_event = get_cmt_data(event_id="2016p858000")

Reviewed-plane convention

When reviewing a CMT solution using the Streamlit app, the selected (preferred) plane is stored in the first plane columns and the other (alternative) plane in the second plane columns. Concretely:

• Preferred (chosen) plane -> strike1, dip1, rake1
• Other (non-preferred) plane -> strike2, dip2, rake2
• The PreferredPlane column is set to the chosen value ("1" or "2"), and the reviewer name and reviewed flag are recorded.

This means consumers of CMT_solutions.csv can always treat the first plane as the preferred plane when reviewed == True.

Working with reviewed results

The Streamlit reviewer writes the full working table (including reviewed, reviewer) to the output CSV you specify in the UI. You can use this file directly or replace data/CMT_solutions.csv with your reviewed file to share results.

To contribute reviewed results back to the repository follow the steps in the wiki/CMT Review.md guide.