Folks, be aware the Richter scale of earthquake magnitude is an open-ended scale, and the final number will probably be tweaked in a few days or weeks after all seismographic data has been received and compared.
Richter magnitudes vary based on the location of the epicenter. Example: locally the Loma Prieta earthquake of 1989 was measured at 7.1, where another measurement clocked it at 6.9.
Map of the affected area of the earthquake:
Epicenter and initial recorded shock shown by star. Major aftershocks in circles.
USGS info page:
http://earthquake.usgs.gov/eqinthenews/2004/usslav/