Click any cluster to read the science. Bar = published effect size.
▸ WELL ESTABLISHED
Ocean–Climate–Ionosphere
SST · Wind · Solar · Ionospheric TEC
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SST anomalies drive atmospheric circulation and modulate ionospheric TEC via upward propagating waves · Svensmark & Friis-Christensen, J. Atm. Sol-Terr. Phys 1997
EM–Cavity Resonance
Schumann · Kp · Ionospheric TEC · Solar Wind
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Earth-ionosphere cavity modes directly respond to solar wind pressure and geomagnetic disturbances · Williams, Science 1992; Nickolaenko & Hayakawa 2002
Core → Lithosphere Cascade
Geotherm · Gravity · Magnetic · Seismic · Volcanic
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Mantle convection drives plate motion, gravity anomalies, geothermal gradients and controls spatial distribution of seismicity and volcanism · Anderson, Science 2001
Cosmic Ray → Cloud → Climate
Cosmic Ray · SST · Solar Irradiance
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3–4% variation in global cloud cover correlates with cosmic ray flux over the solar cycle via ion-nucleation of aerosols · Svensmark & Friis-Christensen, J. Atm. Sol-Terr. Phys 1997; CLOUD experiment, CERN 2011
▸ MODERATE EVIDENCE
Tidal Stress → Seismic Triggering
Tidal Force · Seismic · Volcanic
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Lunisolar tidal stress modulates fault slip probability — effect clearest in shallow oceanic thrust faults near syzygy · Tanaka et al., Earth Planet. Sci. Lett. 2002; Cochran et al., Science 2004
Solar Proton Density → M5+ Seismicity
Solar Wind · Kp · Seismic
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Clear correlation (p < 10⁻⁵) between solar proton density and M>5.6 earthquakes with 1-day lag via reverse piezoelectric effect · Marchitelli et al., Nature Scientific Reports 2020
Geomagnetic Storm → Earthquake Lag
Kp · Cosmic Ray · Seismic
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M≥7.5 earthquakes show statistically significant increase ~27–28 days after intense geomagnetic storms via Lorentz force in fault zones · Urata et al. 2018; PMC study 1932–2016 Kp analysis
▸ OBSCURE & CONTESTED — Research Hypotheses
⚠ NOT FOR OPERATIONAL USE — The correlations below are active areas of scientific research with contested or unconfirmed mechanisms. They appear in peer-reviewed literature but have not been validated as operational forecast tools. Do not use these to make decisions about hazard preparation, evacuation, or emergency response.
Geomagnetic Jerk → Seismic Swarms
Magnetic · Kp · Seismic
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Geomagnetic jerks (abrupt secular variation slope changes from core torsional oscillations) coincide with global seismic swarm episodes · Florindo & Alfonsi, Ann. Geofis. 1995; De Michelis et al. 2005 (Sumatra M9.3 possibly triggered a jerk)
Earth Rotation Slowdown → Seismicity
Tidal Force · Seismic · Volcanic
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Periods of slower Earth rotation (longer days) correlate with enhanced global seismicity — >65% of M7+ events occur during LOD maxima. Caribbean tectonism peaks forecast for ~2030 · Bendick & Bilham, Geophys. Res. Lett. 2017; Frontiers Earth Sci. 2022
Lithosphere–Atm–Ionosphere (LAIC)
Cosmic Ray · Ionospheric TEC · Seismic
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Pre-seismic radon outgassing ionises the boundary layer, altering atmospheric conductivity and producing measurable TEC anomalies 5–10 days before M>6 earthquakes · LAIC model; Pulinets & Ouzounov 2011; Geosciences 2024
Solar Grand Cycle → Volcanism
Solar Irradiance · Volcanic · Kp
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Correlation r=0.84 (p=0.01) between volcanic eruption frequency 1868–1950 and solar magnetic cycles of southern polarity. 350-yr grand cycle matches both. Also matches Jupiter's ~11.86-yr orbital period · Zharkova et al., Global J. Sci. Research 2023; Frontiers Earth Sci. 2025
Core Oscillation → Surface EM
Kp · Magnetic · Schumann
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6-year torsional oscillations of Earth's fluid outer core correlate with LOD variations and geomagnetic jerks, producing surface EM signatures detectable in Schumann cavity modes · Nature Comms 2020; ScienceDirect 2018 (6-yr westward rotation)
Ocean Heat → Fault Pore Pressure
SST · Seismic · Geothermal
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SST anomalies alter ocean loading on submarine faults and modulate hydrothermal pore pressure gradients. Weak but detectable correlation with shallow (<30km) submarine seismicity. Under active investigation · Tolstoy et al., Science 2002
Muon Flux → Fault Zone Trigger
Cosmic Ray · Seismic · Kp
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High-energy muons from cosmic rays penetrate crust to 10+ km depth. In seismogenic zones near failure threshold, muon-induced nuclear-electromagnetic cascades may provide the final trigger increment · Tsarev & Chechin 1988; Science.gov review; LSTM classification 84.47% accuracy (Atmosphere 2024)
Large Low-Shear-Velocity Provinces
Gravity · Magnetic · Geothermal
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Two antipodal thermochemical superplume structures at the core-mantle boundary control long-wavelength gravity, heat flow patterns and magnetic field geometry. Their edges correlate spatially with deep-focus seismicity and hotspot chains · McNamara & Zhong, Nature 2005; ScienceDirect LLSVP 2018
NOTE: Correlation % reflects published effect sizes or explained variance — not certainty of causation. Well Established clusters are backed by robust replication; Moderate Evidence clusters are directionally supported but have significant uncertainty; Obscure & Contested clusters are research hypotheses only and must not be used for operational hazard assessment. For real-time official alerts see USGS earthquake.usgs.gov, NOAA tsunami.gov, and NWS weather.gov.
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