Comprehensive specification of geophysical catalogs, Uber H3 spatial discretization, physical crustal stress formulas, and calibrated machine learning ensemble architecture powering EarthquakeLive.org.
Hierarchical hexagonal spatial indexing minimizing planar and distance distortion
Traditional latitude/longitude bounding grids suffer from severe polar distortion and heterogeneous neighbor topologies. EarthquakeLive.org adopts the Uber H3 discrete global grid system based on regular hexagons.
Cell diameter: ~110 km
Area: ~11,000 km²
Regional tectonic belt scale
Cell diameter: ~40 km
Area: ~2,500 km²
Local fault segmentation scale
Every hexagon aggregates spatial seismicity counts, fault proximity, b-value slope, and tidal parameters.
Multidimensional geophysical indicators capturing stress accumulation and fault dynamics
Under standard equilibrium conditions, b ≈ 1.0 (for every M=5 quake there are ~10 M=4 and ~100 M=3 quakes). As shear stress accumulates in an asperity lock, micro-ruptures are inhibited and b drops below 0.8, serving as an empirical proxy for heightened hazard.
Because seismic energy scales with magnitude, elastic rebound displacement is proportional to √E. Monitoring cumulative strain tracks seismic quiescence and precursor accelerating moment release (AMR).
Ratio of 7-day short-term event frequency to 30-day baseline background. Elevated values indicate swarm triggering or foreshock cascade sequences.
Frequency-magnitude slope deviations, elastic strain buildup, foreshock swarm acceleration, and prolonged crustal quiescence on locked fault segments.
Geodesic proximity to GEM Global Active Fault structures, historical tectonic slip rates, and one-hot faulting kinematics (subduction, strike-slip, thrust).
Astronomical ephemeris modeling lunar and solar gravitational tidal potential, syzygy alignment cycles (spring vs. neap tides), and lunar orbital perigee phase.
Hypocentral depth profiling (shallow crustal vs. deep Benioff-Wadati zones) combined with NOAA SWPC planetary geomagnetic disturbance indices (Kp).
Subduction megathrust earthquakes with shallow focal depths (h < 50 km) and high moment magnitudes (M ≥ 7.0) impart massive vertical co-seismic slip to the water column. In the open deep ocean (mean depth d ≈ 4000 m), tsunami waves propagate under the shallow-water wave equation at phase speed c = √(g·d) ≈ 200 m/s (~720 km/h). Real-time telemetry ingestion from NOAA PTWC / NTWC via CAP XML v1.2 maps concentric 15m, 30m, and 1h arrival isochrones, coupled with coastal shoaling amplification via Green’s Law (H₂/H₁ = (d₁/d₂)^(1/4)).
Magma ascent through brittle crust fractures rock and produces shallow micro-seismic swarms preceding volcanic eruptions. EarthquakeLive correlates every event against the Smithsonian Global Volcanism Program (GVP) database of 1,214 Holocene volcanoes within a 25 km crater radius and 20 km depth limit, comparing event rates against a 30-day baseline to distinguish real magmatic unrest from tectonic aftershocks.
Volcanic ash plumes pose an acute catastrophic risk to jet aircraft engines via silicate glass melting and turbine blade erosion. EarthquakeLive continuously ingests Volcanic Ash Advisories (VAA/VAG) from all 9 ICAO operational VAAC centers worldwide, extracting spatial polygons across vertical flight levels up to FL600+ (60,000 ft) at 0h, +6h, +12h, and +18h forecast horizons.
Calibrated ensemble decision models across 12h, 24h, 72h, and 7-day forecast horizons
Immediate acute precursory & foreshock hazard window
Immediate short-term aftershock & foreshock hazard
Primary operational window for civil protection alerts
Synoptic weekly tectonic strain accumulation trend
| Component | Algorithm | Target | Loss / Optimization |
|---|---|---|---|
| Hazard Classifier | Gradient Boosted Decision Forest | Binary Event: M ≥ 4.5 in horizon | Balanced class weight, logloss + Brier Loss |
| Magnitude Regressor | Robust Expected Magnitude Regressor | Expected M_max in H3 cell | Huber Loss (outlier-resistant) |
| Probability Calibration | Monotonic Empirical Calibrator | P_calibrated ∈ [0, 1] | Brier Score minimization, Reliability match |
Raw gradient boosting outputs are often miscalibrated in imbalanced domains. Isotonic probability calibration guarantees empirical reliability: when the model outputs a 40% hazard score, an event occurs in exactly 40 out of 100 historical instances.
Game-theoretic attribution of risk predictions to distinct physical drivers
For every hexagonal cell, EarthquakeLive.org computes TreeSHAP attribution vectors. Users and scientists can click any polygon on the map to inspect the exact percentage contributions of each physical parameter.
Models continuously walk forward through newly recorded catalogs, evaluating forecast windows against ground truth to update weights and track feature drift (PSI).
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Continuous automated evaluation against ground-truth seismic catalogs under an out-of-time walk-forward protocol.
All forecasts published on EarthquakeLive are permanently timestamped and audited against authoritative catalogs (USGS ComCat & EMSC) once each forecast horizon expires. Isotonic probability calibration guarantees that if a region is assigned a 60% probability, a seismic event occurs in 60 out of 100 such forecast windows.
Deck.gl v9 instanced geometry, Native MapLibre vector fallback, DPR 1.0 memory clamping, and antimeridian-safe spherical camera paths
For high-end desktop and mobile browsers, EarthquakeLive leverages Deck.gl v9 with instanced 3D hexagonal prisms (PolygonLayer) and pulsing epicenter rings (ScatterplotLayer) rendering at 60 FPS. When operating on memory-constrained Smart TV web engines (Samsung Tizen WebAPI, LG webOS, Android TV WebView) or low-tier hardware, the system dynamically switches to Native MapLibre vector rendering via shouldUseNativeMapLibre.
Memory footprint is strictly constrained by clamping devicePixelRatio to 1.0 on 4K/8K displays, reducing GPU frame buffer memory by up to 75% without perceptible loss of legibility at 10-foot viewing distances.
The 10-foot user experience operates entirely through physical TV remote controls (UP, DOWN, LEFT, RIGHT, ENTER, RETURN, EXIT). On Samsung Smart TVs, tvTizenBridge.ts registers keycodes with the Samsung Tizen WebAPI. LG webOS and Android TV remotes use native synthetic keyboard event listeners.
The autonomous Autopilot Tour cycles through significant global clusters using the decoupled CameraFlightController. To eliminate jarring 360-degree camera spin when traversing the 180° antimeridian (e.g., between Japan and Alaska), flight delta is computed via normalized angular delta:
Trajectories execute with smooth cubic easing, dynamic elevation tilting, and automatic pause cycles tailored for public signage.
When a major seismic event (M ≥ 5.5) is ingested by any of the 18 live catalogs, the Autopilot Tour and screensaver loops are preempted in real time. The camera smoothly vectors directly to the new epicenter, displays the critical telemetry card, and initiates acoustic audio synthesis alerts.
Rigorous theoretical foundations grounded in international seismological literature
"Aki, K. (1965). Maximum likelihood estimate of b in the formula log N = a - bM and its confidence limits. Bulletin of the Earthquake Research Institute, Tokyo University, 43, 237–239."
Pipeline Role: Evaluates frequency-magnitude distribution slope across Uber H3 Res 4 cells; identifies acute shear stress concentration anomalies (b < 0.8).
"Gutenberg, B., & Richter, C. F. (1944). Frequency of earthquakes in California. Bulletin of the Seismological Society of America, 34(4), 185–188."
Pipeline Role: Fundamental physical constraint scaling expected recurrence rates across regional catalogs.
"Benioff, H. (1951). Earthquakes and rock creep (Part I: Creep characteristics of rocks and the origin of aftershocks). Bulletin of the Seismological Society of America, 41(1), 31–62."
Pipeline Role: Computes cumulative acoustic energy and Benioff strain rebound S = ∑10^(0.75 M_i) to detect seismic quiescence or accelerating moment release.
"Wald, D. J., Jaiswal, K. S., Allen, T. I., & Hearne, M. G. (2008). USGS Prompt Assessment of Global Earthquakes for Response (PAGER). U.S. Geological Survey Fact Sheet 2008-3093."
Pipeline Role: Underpins the calibrated log-normal fatality and building vulnerability assessment curves.
"Esteva, L. (1974). Geology and predicting extreme ground motion for earthquake-resistant design. In Proceedings of the 2nd International Conference on Seismic Risk."
Pipeline Role: Isoseismal radius calculation mapping Modified Mercalli Intensity (MMI V–VIII) attenuation.
"Lundberg, S. M., & Lee, S.-I. (2017). A Unified Approach to Interpreting Model Predictions. Advances in Neural Information Processing Systems (NeurIPS 30), 4765–4774."
Pipeline Role: Decomposes ensemble hazard forecasts into exact Shapley values, ensuring full transparency.
"Bird, P. (2003). An updated digital model of plate boundaries. Geochemistry, Geophysics, Geosystems, 4(3), 1027."
Pipeline Role: Spatial distance to plate boundaries, relative motion rates, and plate convergence kinematics.
"Meeus, J. (1998). Astronomical Algorithms (2nd ed.). Willmann-Bell, Richmond, VA."
Pipeline Role: Computes lunar and solar gravitational tidal potential and syzygy alignment cycles.
"Titov, V. V., & Synolakis, C. E. (1998). Numerical modeling of tidal wave runup. Journal of Waterway, Port, Coastal, and Ocean Engineering, 124(4), 157–171."
Pipeline Role: Underpins NOAA MOST tsunami simulation and deep-ocean DART buoy wave inversion models.
"Kajiura, K. (1970). Tsunami source, energy and the ratio of wave energy to seismic energy. Bulletin of the Earthquake Research Institute, Tokyo University, 48, 835–869."
Pipeline Role: Formulates the ratio of seismic radiated energy to tsunami potential energy in shallow subduction megathrust ruptures.
"OASIS Standard. (2010). Common Alerting Protocol Version 1.2. OASIS Open Standard."
Pipeline Role: International interoperable XML standard for real-time ingestion of NOAA PTWC/NTWC multi-agency hazard bulletins.
Strict scientific reproducibility adhering to international seismological standards
100% of raw seismological waveform solutions and earthquake event records are ingested in real-time from open public institutions: USGS, EMSC FDSNWS, ISC, BMKG, GeoNet NZ, INGV, and GA. Raw data is never modified or fabricated.
All machine learning forecast models are evaluated on frozen, out-of-time test folds (CSEP standard). The full verification ledger with Brier Skill Score (+0.354) and ROC-AUC (0.814) is publicly auditable via the open metrics API.
We reject unscientific deterministic prediction claims. Fault nucleation obeys non-linear continuum mechanics. EarthquakeLive models strictly calibrated conditional probabilities P(M ≥ 4.5) to empower emergency preparedness.
Verified scientific, operational, and emergency protocols
Switch to the interactive WebGL map with real-time fault lines, recent quakes, and calibrated hazard cells.