Here's a breakdown:
* Transform Boundaries: These are where plates slide past each other horizontally. The friction between the plates builds up stress, which is released in the form of shallow earthquakes. The San Andreas Fault in California is a prime example of a transform boundary with frequent shallow earthquakes.
* Convergent Boundaries: Here, plates collide. The pressure and friction from the collision cause earthquakes, typically at shallower depths. There are two types of convergent boundaries:
* Subduction Zones: One plate dives beneath the other. Earthquakes occur along the contact zone between the plates, as well as along the overriding plate.
* Continental Collisions: When two continental plates collide, they buckle and fold, creating mountain ranges and shallow earthquakes. The Himalayas are a prominent example of this.
Divergent Boundaries: These are where plates pull apart. While divergent boundaries are associated with volcanic activity, the earthquakes here tend to be shallower and smaller in magnitude compared to those at transform or convergent boundaries.
Important Note: While the majority of shallow earthquakes occur at these boundaries, it's important to note that occasional shallow earthquakes can also occur within plates, known as intraplate earthquakes. These are less common than boundary-related earthquakes but can still be significant.
