Anyone interested in making even extremely small movements of the ground below visible, you may want to try the following, it is easy cheap and effective and even will register a truck passing by your house. Take a small glass of water place it on a surface such as a desk, table etc. mount a LED spot light above, a little side ways so it will cast a reflection on the ceiling. The more powerful the light ( an LED, for example a 50 w spot in one of inexpensive desk lamps) and the higher the ceiling, the longer the path of the light, the bigger the amplification. Or if you want to get really fancy you could chop up a piece of CD-DVD glue it on to a small piece of wood or cork and float it on the water with the light shining on it. t is an interesting experiment.
Here in the mid-Atlantic we had some EQ activity a year ago. Enough to do $millions of damage to the National Cathedral and Washington Monument in Washington, DC. The first major tremor there was strong shaking of the wall I was facing. Not long after I was sitting at my computer and thought I felt something. That was confirmed on news reports. Later I had a cup of water on my desk and the surface began to shimmer I then thought I felt a very slight movement while in my chair. That also was confirmed by news reports which said it was about a 2.1, the smallest.