Subspace spiral

The Subspace spirals were gigantic subspace vacuoles in the Cardengi Expanse. They were created by the Yochorians as a means of extensively expanding their territory in their domain.

They were created by incomprehensibly means. Although Starfleet had theorized immense subspatial and spatial irregularities and energies came into play in forming the intricate vacuole. The 15 discovered in the Cardengi Expanse measured at over 15 centuries in age.

When created, they emitted millions of sieverts of radiation, in 2475 when the Yochorians wanted to merge all 15 into one huger vacuole, calculations showed that radiation would be at over 10,000,000 sieverts. Nearly a 6250000 times more than fatal. Again in 2475, the Yochorian-Galactonian Alliance almost destroyed Earth when the Galactonians decepted the Yochorians that humanity would be a threat to their "subspace operations" and should create a spiral in the Terran Sect to cease their interference.

Going back on the merging of the 15, if that were to happen, anything in a 625000 km radius would be exposed (at maximum distance) to over 13,200 rads, 82x higher than fatal radiation dosage, and over 22x+ than a starship can absorb.