Ternary-FMS

A Ternary Diagram for Earthquake Focal Plane Solutions (FPS)

Overview

Ternary-FMS provides a quick and efficient way to classify earthquake focal plane solutions (FPS) into four categories:

• Strike-slip
• Normal
• Reverse
• Oblique

The focal mechanisms are plotted on a ternary diagram for visualization. Additionally, the vector classification (mClass) returns the mechanism styles for further analysis or plotting.

Features

1. Classify FPS into four categories based on dP, dT, and dB axes.
2. Generate a ternary diagram for FPS visualization.
3. Seamlessly handle focal mechanism solutions in the conventional strike, dip, and rake format.

Usage

You can use Ternary-FMS in two ways:

1. Plot the Ternary Diagram
   Use this mode to classify and plot FPS on a ternary diagram.

   cat = pd.read_csv('eq_until_2M_text.csv')
   dP, dT, dB = convert2tri(cat.Strike.values, cat.Dip.values, cat.Rake.values)
   mClass = TernaryFMS(dP, dT, dB, ax1)

2. Only obtain the classes (no figure)
   Use this mode to classify and plot FPS on a ternary diagram.

   cat = pd.read_csv('eq_until_2M_text.csv')
   dP, dT, dB = convert2tri(cat.Strike.values, cat.Dip.values, cat.Rake.values)
   mClass = TernaryFMS(dP, dT, dB)