Fig 8. (A) Anticipated raypaths for sources in wedge, lower crust, and upper crust. (PostScript version, RTMOD mesh file).

(B) Anticipated traveltime anomalies for melt in upper crust (top row) and lower crust (bottom row), assuming 1 km/s velocity anomalies, from sources west (left column), east (middle column) and at below (left column, 100 km depth in the slab). Note shadow zones caused by lower crustal melt. Note that the typical anomaly exceeds 0.2 s. (PostScript version).

(C) Anticipated traveltime anomalies for melt in wedge (top), upper crust (middle) and lower crust (bottom), assuming 1 km/s velocity anomalies, from source at 100 km depth in slab. Note that the typical anomaly exceeds 0.2 s. (PostScript version).