I want to know the answer to the following question:
What was the horizontal slippage perpendicular to the fault?
All the background I'm provided with is that "In the epicentral area, the average slip in Beichuan Fault was about 3.5 metres (11 ft) vertical, 3.5 metres (11 ft) horizontal-parallel to the fault, and 4.8 metres (16 ft) horizontal-perpendicular to the fault.". Is that enough to answer the question?