



GREAT FILTER ZONE(SP-001) / AMAZON EXCLUSION ZONE - 01/05/2001
Photograph taken by an Amazon Exclusion Zone monitoring team using a SIRFA SR-200 camera.
The image shows the outer perimeter of the region known as the Great Filter Zone, an area occupied by colossal structures catalogued as SP-001. These structures appear to perform a filtration function, absorbing and processing residual biological matter released or left behind by Skafo-class entities.
ENTITY: SP-001
Common Designation: PT-BR: Filtro / EN: Filter
Structural Class: Π / Págo
Cognitive Class: α / Alpha
Designation: Π-α
Classification Note: Under F.N.P.A. taxonomy (Força Nacional de Proteção Amazônica / National Force for Amazon Protection), SP-001 is classified as an entity despite showing no confirmed cognition, mobility, or hostile intent.
Estimated Height: approximately 500 to 1,300 meters (1,640 to 4,265 feet)
Maximum Recorded Reach: when considering fully extended filament structures, some SP-001 formations may exceed 5 kilometers in total vertical reach (16,404 feet / 3.1 miles)
Estimated Weight: no reliable data available
Description
The region known as the Great Filter Zone was first identified during the initial Brazilian Army incursion into the Amazon Exclusion Zone in 1988, while advancing toward the presumed origin point of the Signal.
SP-001 structures begin appearing at heights of roughly 500 meters (1,640 feet). From elevated observation points, several formations exceeding one kilometer (0.62 miles) in height can be seen along the horizon.
Each structure consists of a massive basal formation supporting a large spherical body perforated by numerous cavities. Some of these openings are estimated to extend more than 200 meters (656 feet) inward. From these cavities emerge long filament-like appendages, which sweep the surrounding area near the base of the structure, collecting dead organic matter and biological residue.
Under specific atmospheric and environmental conditions, these filament structures have been observed extending vertically into the upper cloud layers. Long-range optical analysis suggests that, in rare cases, the fully extended appendages of larger SP-001 structures may surpass 5 kilometers (3.1 miles) in total height from ground level.
SP-001 entities are not considered aggressive. Monitoring teams and military personnel have been able to approach several of the structures at close range. However, no physical samples have ever been successfully recovered. The external plates covering the basal formations are extremely resistant; every tool or cutting device used in extraction attempts was either damaged or rendered inoperable.
Unlike most other entity classes, SP-001 does not produce loud vocalizations or low-frequency resonant emissions. Instead, it emits a faint, high-pitched sound that is almost imperceptible at a distance. Prolonged exposure to this sound has been associated with increased stress, fatigue, disorientation, and cognitive confusion among personnel operating in the area.
Due to their passive behavior, the F.N.P.A. was able to construct long-range monitoring towers near the perimeter of the Great Filter Zone. These installations remain essential for tracking Skafo residue accumulation, environmental degradation, and the movement patterns of larger entities within the Amazon Exclusion Zone.
For more context: https://www.youtube.com/@v_limbo88
BRAZIL MAP - 1994: https://www.reddit.com/r/imaginarymaps/comments/1t76iu9/map_of_brazil_in_1994_null_vortex_crisis_timeline/
Obs: The image was developed using Sculptris Alpha 6, Blender 5.1.1, and GIMP.