Iceland Results

• Figure Comparison of A) Palmasson's (1972) map of the depth to the 6.5 km/s layer. Warm colors indicate deeper depths. B) Allen's (2001) shear velocity anomaly at 10 km depth. Warm colors indicate slower velocities. C) My redo of Palmasson's map, adding new refraction data (i.e. from SIST, KATLA, FIRE, ICELINE, B96 and RISE) and using automated gridding. D) The P velocity at 10 km depth, based on my recompilation. Warm colors indicate lower compressional velocities. Note the general similarity of the four maps. (PostScript Version).
• Figure P wave velocity data (red and blue symbols) overlaid onto Allens shear wave velocity map. P wave data are extracted from my recompilation at 10 km depth. Symbol size scales with P velocity above (blue) and red (below) 6.65 km/s. (PostScript Version).

Data

P wave point data, 10 km below sea level

P wave point data, 10 km below surface

References

Allen, Richard, The mantle plume beneath Iceland and its interaction with the north Atlantic ridge: a seiosmological investigation, Ph.D. Thesis, Princeton University, 2001.

Palmasson, G., Crustal structure of Iceland from explosion seismology, Societas Scientiarum Islandica, Reykjavik, 1972.