IS-TEWS v29 Feature Dataset: India-Specific Tsunami Early Warning System with Physics-Informed LightGBM Classification

Feature dataset for IS-TEWS (India-Specific Tsunami Early Warning System) v29 — a real-time tsunami early warning system for the Indian Ocean region targeting the Indian coastline. ## Dataset Summary- 17,038 earthquake records (M≥5.5, Indian Ocean region, 1990–2024)- 28 physics-informed engineered features derived from seismic parameters- Binary labels: 1 = tsunamigenic, 0 = non-tsunamigenic- Chronological train/val/test split (70/15/15) ## Split Details- Train: 11,928 samples (1990–2013) | 201 positives- Val: 2,555 samples (2013–2019) | 52 positives- Test: 2,555 samples (2019–2024) | 77 positives ## Feature EngineeringFeatures are derived deterministically from earthquake magnitude, depth, and location using:- Haversine distance to India (15°N, 80.5°E) and Andaman trench- Shallow-water tsunami wave speed and travel time estimates- 8-zone subduction zone taxonomy (Andaman, Sumatra, Makran, Java, Arabian Sea, Bay of Bengal, Manila, Java-2)- Physics-based depth sigmoid, energy proxy, fault score interaction terms ## Model Performance (LightGBM GBDT v29, 581 trees)- AUC: 0.9957 | Recall: 0.8571 | Precision: 0.750 | F1: 0.800- False Alarms: 22 | Missed Tsunamis: 11/77 test positives- Threshold: 0.110 (val-optimised, constrained F1 with recall floor 0.85)- Pipeline recall = raw recall (physics filter verified end-to-end) ## Physics Filter (inference-only, 4 rules)R1: depth > 100 km → cap probability (deep quakes non-tsunamigenic)R2: dist_zone > 0.65 → cap probability (far from subduction zones)R3: fault_score < 0.2 AND mag < 7.5 → cap probability (strike-slip mechanism)R4: mag ≥ 7.5 AND depth < 80 km AND near India → FORCE alert (structural safety) ## Privacy NoteRaw lat/lon coordinates removed. Spatial information preserved via distance-based features (dist_india, dist_trench, dist_zone). The production model uses 30 features including lat/lon at inference time. ## Data Sources- Seismic catalog: USGS FDSNWS API (earthquake.usgs.gov)- Tsunami labels: NOAA NGDC Tsunami Event Database (ngdc.noaa.gov) ## Files- is_tews_features_v29.csv — full dataset in CSV format (17,038 rows × 33 columns)- is_tews_features_v29.parquet — same dataset in Parquet format (compressed, faster loading)- DATASET_README.md — full column descriptions and usage notes