[pollywog]

....but isn't 25 miles close enough to Mammoth that it wouldn't really be significant? I mean , if it was in New York or Texas, or Florida, I would say that is really something!!!! but 25 miles? hmmmmm

The only reason that I felt that this was newsworthy was due to the fact that it is in an area that isn't known for earthquake activity.

[notpoliticallycorewrecked]

Well the Fresno area and that area of the Central Sierras doesn't have any significant fault lines. At least none that were previously known to USGS. Unfortunately the Northridge fault was also unknown until that quake occurred.

Oakhurst had a pretty good shake during May 1980 Mamouth Mountain quake. Which occurred within days of the Mount Saint Helen's eruption.