Correct Option
The correct option is 2 and 3 only.
Explanation
The "Ring of Fire," also known as the Circum-Pacific Belt, is a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes. It is a direct result of plate tectonics, specifically the movement and collision of lithospheric plates along the boundaries of the Pacific Plate.
Statement-wise Analysis
- Statement 1 is Incorrect. The Ring of Fire does not coincide with mid-oceanic ridges. Mid-oceanic ridges are divergent plate boundaries where new crust is formed (e.g., the Mid-Atlantic Ridge). In contrast, the Ring of Fire is primarily associated with convergent plate boundaries (subduction zones) where oceanic plates are sinking beneath continental or other oceanic plates, leading to the formation of trenches and volcanic arcs.
- Statement 2 is Correct. The region is characterized by deep-seated earthquakes. As the oceanic plate subducts into the mantle, it creates a zone of seismicity known as the Wadati-Benioff zone. Earthquakes here can occur at depths extending several hundred kilometers, unlike the shallow-focus earthquakes typically found at divergent boundaries or transform faults.
- Statement 3 is Correct. The Ring of Fire is geographically located along the rim of the Pacific Ocean. It traces a horseshoe shape extending from New Zealand, along the eastern edge of Asia, across the Aleutian Islands of Alaska, and down the western coasts of North and South America.
Key Takeaway
Key Takeaway: The Pacific Ring of Fire is defined by convergent plate boundaries (subduction zones) and deep ocean trenches, distinguishing it from mid-oceanic ridges which are divergent boundaries. It is the site of the majority of the world's seismic and volcanic activity.