Strike
°
Direction of fault trace from north (0-360°)
Dip
°
Angle of fault plane from horizontal (0-90°)
Rake
°
Direction of slip on fault plane (-180 to 180°)
Fault Type
Strike-slip
About Fault Types
Select a preset to learn about different fault types and see their characteristic beachball patterns.
Stations (0)
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Depth: 10 km |
Legend:
● UP
○ DOWN
◐ ?
Takeoff angles use a simplified 1-D model. For research-grade polarity analysis, use ray-tracing through IASP91 or AK135.
Focal Mechanism
Strike-slip
3D Diagram
Step 1 / 4
Focal Mechanism Details
The beachball diagram shows the orientation of fault motion during an earthquake.
Black quadrants represent compression,
while white quadrants represent tension.
Which Plane is the Fault?
●
Nodal Plane 1:
Strike: 0° | Dip: 45° | Rake: 0°
○
Nodal Plane 2 (Auxiliary):
Strike: 90° | Dip: 90° | Rake: 180°
Click to select the fault plane. The 3D diagram will update.
Famous Examples
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