Author: He XingChen

Last Updated: 2026-08-14

CNCHASH Documentation

High-performance implementation of HASH for earthquake focal-mechanism determination, built on a Modern Fortran/OpenMP core with a Python front-end.

Contents:

• Installation
  • Requirements
  • Install
  • Development Setup
  • Verify Installation
• Usage
  • Basic Usage
  • With S/P Amplitude
  • From Input File
  • Takeoff Angles from Velocity Models
  • Parameters
  • Tips
• Native Fortran backend (HASH-HP)
  • Architecture
  • Design rules
  • Building
  • Backend selection
  • Batch mode
  • Deliberate differences from HASH v1.2
• Benchmarks
  • Accuracy (synthetic recovery)
  • Native backend measurements
  • Thread scaling (portable build, 30 stations)
  • Config comparison (portable build, ms/event)
  • Comparison with the original HASH v1.2 (same machine)
  • Batch mode (medium config, portable build)
• API Reference
  • Main Functions
  • Quality Rating
  • Modules
  • Low-Level Backend Methods
  • Takeoff Angle API
  • Complete Original-HASH Coverage

Links

• English documentation
• 中文文档

Indices and tables

• Index

• Search Page