Comparison of FIRE Kamchatka Teleseism with ICEMELT P traveltime prediction

Fig 1: Traveltime anomaly for the Kamchatka teleseism. (Solid) Mantle anomaly, from ICEMELT mantle model (excludes station corrections). (Dashed) Crustal anomaly from FIRE model (down to 40 km) (Bold) Total anomaly. The fastest part of the crustal anomaly, which occurs at a range of about 6915 km, is due to the dramatic rise in Moho beneath Krafla. The slowest part of the mantle anomaly is displaced to the left (northwest) of Krafla. of Krafla. (PostScript version of plot).

Fig 2: Filtered (2-4 Hz) vertical component record section of Kamchatka teleseism as recorded by FIRE, reduced to IASPEI phase velocity of 16.68 km/s. (Bold) Total anomaly, from above. The absolute arrival time of the anomaly is arbitrary. (PostScript version of plot).

Supporting Data

• ICEMELT mantle delays, as calculated by Cecily Wolfe (table). Note: Three anomalies are given: mantle delay, spatially interpolated receiver delay, total delay. Only the mantle delay is used here.
• FIRE crustal delays, as calculated by Bill Menke (table)
• Anomaly (table, rsx pickfile)
• Vertical component seismograms (AH format). Note: The timing on these seismograms has been corrected for the known 40 ms offset of the IRIS REFTEK's and for topography (assuming a surface velocity of 3 km/s).
• Unfiltered record section (PostScript version).