1. FOCAL PLANE MECHANISM http://www1.gly.bris.ac.uk/~george/focmec.html http://www1.gly.bris.ac.uk/~george/focmec.html Dr. N. VENKATANATHAN

2. VERTICAL DIPING PLANE REPRESENTATION

3. STEEPLY DIPPING PLANE

4. SHALLOW DIPPING PLANE

5. The direction of Dip plane can be found by using right hand rule. (i.e.) always when we look at the strike, the fault dip should be at your right side. Therefore bending of dip plane should on the right side with respect to the strike direction.

6. STRIKE

8. Combination of Strike and Dip

9. SLIP Draw tangent to the line, drawn by using Strike and Dip. Draw perpendicular line, which should intersect the tangent and the mid point of the line, drawn by using strike and dip. Extend the line so that it can intersect the circle. The intersecting point with circle should be considered as the starting point slip angle measurement. (i.e.) the intersecting point should be considered as zero degree. From their corresponding slip angle should marked.

10. 0 o Slip

11. If it is 0 o or 180 o then it will be a straight line. For other angles the bending of line should be opposite to that of line, which drawn in combination of strike and dip. For example the “strike and dip” line bends in right side means, the slip line should bends in left side and viz. The amount of bending increases, when we move towards 90 o and again decreases towards the Centre of the circle, so that it can become a straight line when approaches 180 o.

12. Magnitude 6.7 - NEGROS - CEBU REGION, PHILIPPINES Strike= 34, Dip=57 and Slip= 106

13. Magnitude 7.1 - VANUATU Strike= 46 Dip=30 Slip= -51

14. Magnitude 7.2 - OFF THE WEST COAST OF NORTHERN SUMATRA Strike=195 Dip=79 Slip= 16

15. Magnitude 9.0 - NEAR THE EAST COAST OF HONSHU, JAPAN Strike= 29 Dip=77 Slip= 95

16. Magnitude 7.0 - HAITI REGION Strike= 71 Dip=64 Slip= 25