the second happened at 7:32 this morning off lonnie kai drive. that was a 3.5 and the third happened three minutes after that, centered at ellis lake park near ellis street and that was a 2.7. contra costa fire reports no damage to any buildings. but we did speak with some people getting ready for work and they described a swarm of quakes -- the swarm of quakes with a big jolt. >> i was thinking if we were in the house, where would i go? what would i get? i'm definitely cognizant of it. >> reporter: not only were there three small quakes today, there was a 3.7 on sunday afternoon around 3:15. the experts say they are on the concord/green valley line. it runs to lake berryessa. the smaller swarms of earthquakes are similar to the same quake that happened in the same area back in the year 2000. >> we see this as a repeat of that similar earthquake and so there's likely to be this sort of swarm going on for a while. but certainly not out of the ordinary. >> reporter: experts say don't be surprised to see these small -- swarms of earthquakes for the