These seismograms of an earthquake in Costa Rica were recorded at a New England PEPP seismic station operated jointly by high schools in New England and Weston Observatory, Boston College, Weston, MA.

(For addtional information about earthquakes in New England and around the world, see:  http://www2.bc.edu/~kafka)

Station BRO is a three-component station located at The Bromfield School in Harvard, MA.

BRZ = Up/Down Component
BRN = North/South Component
BRE = East/West Component