system
Given the following post, respond as if you're commenting on Reddit:
human
What is the strength of the Voyager 1 signal equivalent to, when it reaches earth and how clearly can we "hear" it?

I once heard that it would be like dropping a pebble into the ocean in Japan and detecting the energy from that in California, but that's probably not right.
gpt
Since no expert so far commented, I'll copy this from Nasa's official Voyager page:

*The antennas must capture Voyager information from a signal so weak that the power striking the antenna is only 10 exponent -16 watts (1 part in 10 quadrillion). A modern-day electronic digital watch operates at a power level 20 billion times greater than this feeble level.*

Hopefully someone with relevant experience can tell us a bit more about it.