Are USGS scientists ignoring the prediction?
No. The work of the Keilis-Borok team is a legitimate approach to earthquake prediction research. However, the method is unproven, and it will take much additional study, and many additional trial predictions, before it can be shown whether it works, and how well. If the method, or one like it, is eventually shown to work, it will demonstrate that the Earth’s crust contains information about upcoming large shocks. This would be an important finding, and would spur additional research that might someday lead to societally useful predictions.