[RantyDave]

I have a drunken plan involving sending neutrinos through the earth as a form of communication. Friends inform me that it has only three problems: producing the neutrinos; modulating the signal; and detecting it at the other end. I shall continue pottering.

[sterlind]

Atomic bombs produce large bursts of neutrinos, which should be sufficient for the Super-Kamiokande detector in Japan. Amplitude modulation is possible through Dial-a-Yield and MIRV warheads can convey multiple bytes. Environmental impact may rival Bitcoin though..

[eesmith]

How much earth? Quoting https://www.worldscientific.com/doi/abs/10.1142/S02177323125... from 2012

> We report on the performance of a low-rate communications link established using the NuMI beam line and the MINERvA detector at Fermilab. The link achieved a decoded data rate of 0.1 bits/sec with a bit error rate of 1% over a distance of 1.035 km, including 240 m of earth.

https://arxiv.org/pdf/1601.05022.pdf from 2016 upped that to 810 km.

[qubex]

That’s surprisingly similar to my build-a-laser-to-traverse-the-core-and-then-beam-financial-data-through-it.

Current state of research: my remote cousins in New Zealand and I have made a “planet sandwich” by laying bread on the floor of our antipodal dwellings.

[ridgeguy]

Nuclear reactors produce neutrinos and they can be detected [1]. For modulation, maybe vary the reactor power output (low bit rate, to be sure).

People have explored neutrinos for communication with submerged submarines [2].

[1] https://en.wikipedia.org/wiki/Neutrino [2] http://www.physics.ucla.edu/~hauser/neutrino_communication_p...