Birdwatch Note Rating
2023-02-10 02:35:48 UTC - HELPFUL
Rated by Participant: BB62A82DF67EB3403C2670EAFED8A3C5F4566D2E71469D908BC05AB5241EF775
Participant Details
Original Note:
High-frequency Active Auroral Research Program (HAARP) is a scientific facility for studying the ionosphere that directs microwaves (2.7 to 10 MHz) into the upper atmosphere. https://www.britannica.com/topic/HAARP Seismic waves are infrasonic (~20Hz) waves travelling underground at great distances. https://www.britannica.com/science/infrasonics
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