DATA

Observations for ShakeMaps are collected from more than 80 broadband and 25 strong motion stations throughout the state.
Ground motion grids are based on maximum peak ground accelerations and velocities of two horizontal components.
Currently, ShakeMaps are produced for events with magnitudes greater that M3.5 with at least 10 associated arrival picks and calculated MMI greater than 2.0 at the epicenter.

Observations for ShakeMaps are collected from more than 80 broadband and 25 strong motion stations throughout the state.