Strike
By Earthquake Hazards Program
2021 (approx.)
![3 diagrams: At the top is a crustal block diagram showing how strike direction from North along a fault. At the bottom left is a figure showing the strike angle as the angle between North and the fault plane with dip direction pointing away from the fault plane. At the bottom right is a circle with North, East, South, and West and their respective strikes when going clockwise from North: 0, 90, 180, 270.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/media/images/STRIKE.gif?itok=CJRBpKT7)
Detailed Description
The strike is the trend or bearing, relative to north, of the line defined by the intersection of a planar geologic surface (for example, a fault or a bed) and a horizontal surface such as the ground.
Sources/Usage
Image courtesy of Charles Ammon, Penn State