Every two weeks, Reginald Roberts posts a new set of earthquake forecasts on his website, NextEarthquake.com. Roberts says his earthquake forecasts, which included a prediction of the earthquake that shook Hawaii on Thursday (Oct. 20), are accurate over 90 percent of the time. If Roberts is right, then all the world’s seismologists and earthquake geologists are wrong when they say earthquakes are too chaotic to be predicted. John Vidale discusses.