3 to 30 GHz 1 to 1 cm ELF radio waves, the lowest of all radio frequencies, have a long range and are useful in penetrating water and rock for communication with submarines and inside mines and caves.

One known effect is the generation of extremely low frequency (ELF) radio waves through modulated heating. By turning the HAARP array off and on (or more simply, by wiggling the focal point around ...

emitting ELF waves. In tests, radio operators were able to communicate with subs in the Mediterranean, under the Arctic ice cap, and virtually anywhere else in the world. The system went ...

Astronomers from the International Center for Radio Astronomy Research (ICRAR), in collaboration with international teams, have made a startling discovery about a new type of cosmic phenomenon.

The Wireless Electromagnetic Method (WEM) project took 13 years to build but researchers said that it was finally ready to emit extremely low frequency radio waves, also known as ELF waves.

Washington Navy Yard gunman Aaron Alexis left a note saying he was driven to kill by months of bombardment with extremely low-frequency radio waves ... “My ELF Weapon!” Alexis did not target ...

During HAARP’s military tenure, experiments investigated possibilities of turning the ionosphere into a giant antenna for Extremely Long Frequency (ELF) radio waves. Unlike shorter radio ...

Second, ELF and VLF have limited bandwidth ... as more frequencies of radio waves can be used. Submarines can also use underwater optical communication to transmit and receive data while submerged.

ELF waves enable detection of submarines deep underwater ... by these antennas converge in the sky to create a virtual radio-emitting source. As one source dissipates, another is instantly ...