EPGNN: A Graph Neural Network Framework for Earthquake Early Warning and Waveform Representation Learning

EPGNN (Earthquake Prediction Graph Neural Network) is a PyTorch-based research codebase focused on early warning event detection and representation learning for multivariate seismic waveforms. This article will introduce its technical architecture, data processing workflow, and application practices on the STEAD dataset, exploring the application potential of graph neural networks in the field of seismology.

Earthquake early warning is a key means to mitigate disaster losses, but traditional systems rely on threshold detection and statistical models, which have limitations in handling complex waveforms and weak signals. EPGNN attempts to introduce Graph Neural Networks (GNNs), leveraging the spatiotemporal correlation of seismic wave propagation, modeling the station network as a graph structure to better capture the correlations of multi-station data, providing a new path for seismic waveform analysis.

EPGNN adopts a modular design, with core components including:

1. Data Processing Module: Contains an R-language cleaning pipeline, PyTorch Geometric Dataset class (reads HDF5 data on demand to manage video memory), and synthetic data generator;
2. Model Architecture: End-to-end multi-modal GNN backbone, combining a 1D-CNN temporal feature extractor (captures instantaneous waveform patterns) and spatial GCN layers (aggregates adjacent station features);
3. Training and Evaluation Engine: Implements loss calculation for classification (event detection) and regression (magnitude estimation), as well as validation of evaluation metrics.

EPGNN is trained and evaluated based on the STEAD dataset (released by Stanford, containing millions of waveform records). Data is obtained via the Kaggle API: kaggle datasets download -d mostafa/stead. Two operation modes are supported: local synthetic data testing (quick verification) and large-scale training on GPU servers (requires ≥24GB video memory).

The innovations of EPGNN include:

1. Modeling the seismic station network as a graph structure to capture global patterns;
2. Multi-task learning framework (event detection + magnitude estimation) to improve generalization ability;
3. Memory-efficient data loading (block reading to avoid full loading);
4. Synthetic data generator supports rapid algorithm iteration and debugging.

The application scenarios of EPGNN include:

1. Real-time earthquake early warning (multi-station joint analysis improves accuracy and lead time);
2. Seismic event classification (distinguishing natural earthquakes, blasts, etc.);
3. Rapid magnitude estimation (aids disaster assessment and emergency response);
4. Waveform representation learning (supports downstream tasks such as clustering and anomaly detection).

EPGNN faces challenges: data scarcity (limited labeled seismic data), generalization ability (difficulty in transferring models to different geological regions), real-time requirements (complex models need low-latency inference), and interpretability (tension between black-box models and physical interpretability). Future directions: introducing attention mechanisms, combining Physics-Informed Neural Networks (PINNs), exploring self-supervised pre-training, and developing edge computing versions.