BRYAN EATON/Staff photo. Madison Martin shakes their seismometer named Project Greys, center, as her team members watch, Natalie Welling, far left, Mady Ghezzi, left, and Grace Ostrander, right. They were in the "Big Shake" in Gale Regis' sciences class at Amesbury Middle School. Students built their projects last week and tested them Tuesday morning, their goal to detect movement of the “quake” and determine the direction the energy has come from.

180515BEABigShakeAmesburyMiddleschoolRegisseismometers