what ocean lies completely in the eastern hemisphere?

The Indian Ocean lies completely in the Eastern Hemisphere.
This makes it unique among the world's major oceans, as others straddle the Prime Meridian (0° longitude), which divides the Eastern and Western Hemispheres.

Why the Indian Ocean?

The Eastern Hemisphere spans from 0° longitude eastward to 180°.

• The Indian Ocean is bounded by Africa (east of the Prime Meridian), Asia, and Australia—all in the Eastern Hemisphere—and doesn't cross into the Western side.

• It covers about 70 million square kilometers, mostly south of the equator, connecting the Arabian Sea to the Bay of Bengal.

In contrast:

• Atlantic Ocean : Split by the Prime Meridian through its center.

• Pacific Ocean : Vastly crosses into the Western Hemisphere, reaching the Americas.

• Arctic Ocean : Mostly Northern Hemisphere but dips west near North America.

Fun Geography Story

Imagine sailors from ancient times charting routes: Explorers like Vasco da Gama hugged Africa's east coast in the Indian Ocean, never glimpsing Western Hemisphere lands. This ocean powered spice trade legends, linking India to Indonesia without meridian worries—pure Eastern domain!

Hemisphere Breakdown Table

Ocean| Hemispheres Spanned| Fully Eastern?
---|---|---
Indian| Eastern, mostly Southern 8| Yes 13
Atlantic| Eastern & Western 1| No
Pacific| All four 8| No
Arctic| Northern & Eastern/Western 8| No

Common Confusions & Forum Buzz

Quiz sites and textbooks often test this, but some debate boundaries (e.g., Arctic edges). Reddit geography threads from late 2025 called out answer key errors on similar questions, stressing precise longitude checks. No major updates as of 2026—still Indian Ocean undisputed.

TL;DR: Indian Ocean (b), fully east of Prime Meridian.

Information gathered from public forums or data available on the internet and portrayed here.