After looking at the graph and doing some research, the compass direction in which the Pacific Plate has moved during the last 4.6 million years is from the SE towards the NW. You can also write it other ways such as, NNW, to the northwest, or west northwest.
No quema cuhh is the answer;)
Because Earth Sciences covers a lot of ground (pun intended) and nobody has the time or ability to do everything well and thouroughly. The field is very highly specialized in its subdivisions.
Author is the person who wrote or created the original work. Journal articles are used by most fields to publish their original findings. These documents are regarded as primary sources.