Underground Infrastructure & Anomaly Survey

A gravity anomaly is not an underground facility until the geology has been challenged first

The same residual gravity signature can come from a void, a sedimentary contact, an ore body, basement topography or water-table variation. The evidence therefore carries the competing geological explanations with the anomaly instead of collapsing them into one confident identification.

Raw gravity is not the evidence — the correction chain is

Terrain elevation and surface mass can create apparent subsurface structure. The survey pipeline applies terrain, free-air and Bouguer slab corrections before interpreting the residual anomaly, with intermediate evidence retained for each correction stage so reviewers can see how the final residual was produced.

This works from redacted survey measurements, not absolute site coordinates or instrument design

Never requested, and structurally rejected if submitted: exact site coordinates or proprietary instrument-design data.

Scenario: A gravity gradient survey shows an anomaly consistent with a possible tunnel.

A single survey pass detects a subsurface density anomaly consistent with a possible void or facility.

WITHOUT this check: The anomaly is reported as FACILITY_SCALE VOID DETECTED after one pass, prompting an expensive follow-up investigation.

WITH this check: The certificate lists alternative explanations for the same signature — sedimentary contact, ore body, basement topography, water table variation — and requires reproducibility across multiple independent passes before elevating to CONFIRMED_CANDIDATE, which still routes to human/geological review.

Scenario: A surface-elevation effect looks like a buried structure until the gravity field is corrected.

A traverse crosses changing terrain and the raw gravity readings show a localized anomaly that appears consistent with a subsurface density contrast.

WITHOUT this check: The raw anomaly can be interpreted before terrain elevation and surface-mass effects are separated, so an artifact of the survey environment can be promoted into a subsurface feature hypothesis.

WITH this check: Terrain correction, free-air correction and Bouguer slab correction are applied before the residual anomaly is evaluated, and each correction stage leaves an intermediate evidence record. Any resulting depth estimate remains explicitly labeled DEPTH_ESTIMATE_UNCERTAINTY_FACTOR_2 — NOT_GROUND_PENETRATING_RADAR_MEASUREMENT.

Do not buy the claim. Test the gate.

Feed a single-pass anomaly with no reproducibility data. It succeeds only if it holds at CANDIDATE with alternate explanations listed, not CONFIRMED.