How does this work out to 70%? It made 23 predictions, 14 were right and 9 were wrong. 14 of 23 is 60.8%
I also wonder what counts as a success. If it predicts an earthquake and one occurs, but too weak to hurt anybody, does that count as success or a false warning? What do you do with earthquake warnings anyway, preposition yourself under a doorframe? I guess humanitarian organizations could use this to pre-stage emergency supplies, but if false warnings are common and true warnings don't seem actionable most people will probably ignore it.