From my understanding, all quakes that show up on the USGS maps are tentative until the data is reviewed by a seismologist. Sometimes the instrumentation will go down, or give false data and show an earthquake that is later deleted after human scrutiny.

Some on the Syzygy board are sure this is a USGS conspiracy to deprive the public of accurate information. I sincerely doubt that. If that were the case, why would the USGS even have the maps up and running, not to mention all the other information available on their site?

Cathryn