21. Kanamori invented the method for calculating slip distribution on the fault plane by teleseismic waveform with Masayuki Kikuchi. 22. However, there are still disputes over whether the fault plane should have been in the NW or the NE direction. 23. Thus, with the same method, small scale earthquakes are also used to identify fault planes in the Tj�rnes Fracture Zone. 24. Stacking velocity measurements and sonic logging in the area helped to determine that the fault plane slopes at 25 30? 25. This allows for motion along the fault plane to be estimated and its location in the earth s subsurface mapped. 26. The offset of sand and shale beds occurring along fault planes bring sand and shale layers in contact to each other. 27. A " fault trace " or " fault line " is the intersection of a fault plane with the ground surface. 28. The 1989 event's oblique-slip rupture was at 10 km and below on a fault plane that dipped 70?to the southwest. 29. The areal distribution of the individual shocks showed no progression along the fault plane as would be expected with a propagating fracture. 30. If the fault plane terminates before it reaches the Earth's surface, it is referred to as a " blind thrust " fault.
