[oil pan 4]

Originally Posted by aerohead

There are, what are called 'deep focus' earthquakes. Seismic activity happening at depths of 400- kilometers below surface level can effect triggers along fault boundaries.
No one has ever drilled a hole any deeper than 10-miles ( 16-kilometers ). With present technology, it's impossible to instrument these areas.
All 20,000 quakes / year would need to be predicted. On the continents and undersea.
Emptying thousands of people out of skyscrapers and safely getting millions of them out of urban areas and above tsunami levels might require larger time domains. Mass burial sites are already designated for these victims in California.
The US NAVY has the ocean floor littered with hydrophones which can detect a whale fart at 2,000-miles, but in the event of 'hearing' even a tremor, they wouldn't be allowed to communicate its existence, as doing so, could give away state secrets to our adversaries. One downside to secrecy/ national security.

That's another strawman. There is no need or reason to predict all 20,000 world wide earth quakes. Only need to predict the powerful damaging ones in first world countries and most of the first world counties have active tsunami warning systems and are capable of detecting under sea quakes and waring the s-hole countries that there could be a tsunami on its way.