We have cataloged more than 11,000 aftershocks since Nov. 30, with thousands more that are too small to locate. We are confident we’re locating all aftershocks larger than or equal to 1.3. The largest aftershock was a M5.7 and occurred six minutes after the mainshock...

The aftershocks have decreased in magnitude and become more spread out in time over the last year. More than 300 aftershocks have been reported as felt. We expect aftershock activity to continue for another year and a half, but with fewer and fewer likely to be felt.