Concord (KRON) There have been 6 quakes between magnitude 2.5 and 3.5 over a three day period near Concord. These events are happening on Concord fault. These are small quakes but there could be a bigger one on that fault/Quake 1) 3.2 – at 7:01amQuake 2) 3.5 – at 7:32am Was first reported as 3.6…USGS downgraded to 3.5Quake 3) 2.7 — at 7:35amWas first reported as 2.6…USGS upgraded to 2.7The most recent at 7:35am was upgraded to 2.72.6 1km SSW of Concord, California 2015-05-06 14:35:12 UTC13.2 kmThe USGS website recorded hits from many people who reported the jolts as “weak” or “light.”