Solar Wind Ram Pressure and Global Seismic Release: A Statistical Framework

Abstract Solar wind ram pressure — the mechanical force exerted by the continuous flux of charged particles streaming from the Sun — has been proposed as a physical modulator of global seismic release timing. This paper presents a statistical analysis of the relationship between solar wind ram pressure events recorded by NOAA DSCOVR at the Earth-Sun L1 point (July 2016 to May 2026, approximately 9.8 years of solar wind data) and global earthquake rates from the USGS catalog (M4.0+, January 2015 to May 2026, declustered). Twelve independent analyses converge on a consistent signal: solar wind ram pressure drops are followed by elevated global seismicity with a primary response window spanning +12 to +54 hours. The superposed epoch analysis (SEA) identifies a physical peak at +24 hours (1.085x baseline elevation); Pearson cross-correlation identifies a statistical peak at +42-43 hours (r=0.0551, p<0.0001). Both methods measure the same broad response; the difference reflects the SEA sensitivity to the modal response time and the cross-correlation sensitivity to the full integrated signal. The +24-hour lag is adopted as the headline response time. The signal is confirmed by Granger causality testing (F=23.93, p=0.000001 at 1-hour resolution, 36 of 48 lags significant), Monte Carlo permutation validation (100th percentile, Z=3.12σ), and tidal phase analysis confirming independence from lunisolar tidal forcing. Magnitude band analysis identifies M5.0-5.9 as the primary response population (SEA +35.5% elevation, XCorr peak +24h). A 2025-2026 coronal hole high-speed stream case study confirms real-time observational records by the primary investigator: 48 CHSS events produced a 1.99x elevation in M5.0+ daily rates. Dayside hemisphere selectivity analysis confirms a statistically significant 3.3% excess of seismic response on the sunlit hemisphere (ratio 1.033x, t=5.091, p<0.0001, n=1,158 events), consistent with asymmetric magnetospheric compression and inconsistent with tidal or symmetric electromagnetic mechanisms. A formal Chow test identifies 2017-01-01 as the data-determined structural break in global seismic acceleration (F=6.15, p=0.003). Cascadia subduction zone segmented analysis produces a response lag of +96 hours — longer than the global +42 hours — consistent with the proposed Interface Locking Model (ILM) in which accumulated prestress and interface roughness increase the solar wind response threshold and delay. These findings collectively support the hypothesis that solar wind ram pressure acts as a mechanical trigger of seismic release through magnetospheric compression, with response characteristics that scale with fault stress state. A companion paper applying this framework to regional stress state prediction is in preparation.