Figure 2
From: Lateral Variation of Crustal Lg Attenuation in Eastern North America
Distribution of events (circles) and stations (black triangles) used for the Q estimation. Circles are scaled based on earthquake magnitudes and color coded based on event depths. Major seismic zones in the region are marked on the map: Southern Great Lakes Seismic zone (SGL), Western Quebec Seismic Zone (WQU), Charlevoix Seismic Zone (CHV), Lower St. Lawrence seismic Zone (BSL), Northern Appalachians Seismic Zone (NAP), and Laurentian Slope Seismic Zone (LSP). The figure is generated from GMT, which is an open source software available at: http://gmt.soest.hawaaii.edu.
