Seismic Weather Forecast: A Medium-Red Two-Day Lithospheric Storm Targeting July 18-19, 2026

This prospective forecast is a Seismic Weather Forecast - a lithospheric storm forecast - that identifies a two-day seismic-wave target epoch centered on July 18-19, 2026. The forecast is organized by grouped Theta 1 (Target Group) intensity. The July 18 component is medium Orange at AmpZ about 1.28, while the July 19 component rises to Red at AmpZ about 2.32, the strongest single-day value of the month. The event is therefore classified as a Medium-Red two-day wave that builds to a Red peak on the second day. Theta 1 is treated as the primary forecast target, while paired or antipodal Theta 2 theaters are treated as conditional response zones whose expression depends on lock state, regional readiness, and available effective wave height. This wave is unusually concentrated: its weighted targeting funnels almost entirely into a single paired corridor, the AK/Aleutian arc (Theta 1) paired with the Southern Chile/Scotia/Kamchatka complex (Theta 2). The primary evaluation window is July 13-24, 2026, representing five days on either side of the July 18-19 target epoch. The window is deliberately widened to five days because this is the first epoch of its perturbation class detected on this channel, and arrival-timing calibration for the class is correspondingly sparse (see Section 3). This epoch is the channel-complement of the companion deposit DOI 10.5281/zenodo.21138117 (July 11-12, 2026): the two epochs derive from the same new perturbation class, registered on complementary detection channels with the other channel silent in each case, and together they form a matched cross-channel test of class transfer. This document supersedes no prior deposit; both documents remain in force on their own terms. Results should be assessed using cumulative seismic energy against region-specific, aftershock-controlled, outlier-controlled historical baseline windows of the same length.