Frequency Distribution — All Sites
105 Hz107.5 Hz111.2 Hz (Blake)112.5 Hz115 Hz
Iceland

Basalt Field Cave System

Reykjanes Peninsula, Iceland

111Hz
Δ from Blake's baseline (111.2 Hz): 0.2 Hz (0.2%)
SubstrateBasalt (volcanic extrusive)
Chapter RefBook II–III, multiple chapters

The 7.83 Hz hummed on the cave monitors. He did not turn those off. He would never turn those off. Someone would come after him, and they would find the monitors still running, the frequency still present, the cave still singing.

Andrew Chen's primary research facility. Basalt substrate transduces both the Schumann resonance (7.83 Hz) and the preparation protocol fundamental (111 Hz) with exceptional clarity.