Introduction
The Equator (0° Latitude) is an imaginary line drawn east-west on the Earth's surface halfway between the North Pole and the South Pole. It serves as the primary starting point for measuring latitude and divides the Earth into the Northern and Southern Hemispheres.
Main Content
- Physical Characteristics:
- Circumference: Approx. 40,075 km (24,901 miles); Equatorial Diameter: 12,757 km; Equatorial Radius: 6,378 km.
- Shape: Centrifugal force from rotation causes an equatorial bulge and polar flattening, known as a Geoid or Oblate Spheroid.
- Rotation Speed: Highest on Earth at approx. 1600–1700 km/h.
- Day/Night & Climate: Equal 12-hour day and night throughout the year; experience daily heavy convectional rain after 4 PM ("4 O'clock Rain") forming tropical evergreen forests (e.g., Amazon Rainforest).
- Sun Position: Directly overhead twice a year on March 21 and September 22/23 (Equinoxes).
- Continents and Oceans: Passes through 3 continents (South America, Africa, Asia) and 3 major oceans (Pacific, Atlantic, Indian Ocean).
- Countries Passing Through the Equator (13 Countries):
| S.N. | Country Name | Continent |
|---|---|---|
| 1 | Ecuador | South America |
| 2 | Colombia | South America |
| 3 | Brazil | South America |
| 4 | Sao Tome and Principe | Africa |
| 5 | Gabon | Africa |
| 6 | Republic of the Congo | Africa |
| 7 | Democratic Republic of Congo (DRC) | Africa |
| 8 | Uganda | Africa |
| 9 | Kenya | Africa |
| 10 | Somalia | Africa |
| 11 | Maldives | Asia |
| 12 | Indonesia | Asia |
| 13 | Kiribati | Oceania |
- Quick GK Facts:
- Congo River in Africa is the only river in the world that crosses the Equator twice.
- Africa is the only continent through which the Equator, Tropic of Cancer, and Tropic of Capricorn all pass.
- Highest point on the Equator: Volcán Cayambe's southern slope in Ecuador (4,690 m).
- Nearest point in Nepal to the Equator: Lodawari in Jhapa, located approx. 2,900 km north.
Key Takeaways
- The Equator measures 0° Latitude and has a total circumference of approximately 40,075 km.
- It passes through 13 countries across South America (3), Africa (7), Asia (2), and Oceania (1).
- The region between 5° N and 5° S latitude is known as the Doldrums (low atmospheric pressure zone).
- Nepal's southernmost point (Lodawari, Jhapa) lies about 2,900 km north of the Equator.
What to Avoid
- Do not confuse the number of continents cut by the Equator: It directly cuts 3 continents (South America, Africa, Asia).
- Do not forget that Maldives, Kiribati, and Sao Tome & Principe are crossed through their territorial waters rather than major landmasses.
- Do not mistake the river that crosses the Equator twice; it is the Congo River (not the Nile or Amazon).
FAQ
Q1: How many countries does the Equator pass through? The Equator passes through a total of 13 countries across South America, Africa, Asia, and Oceania.
Q2: Which river crosses the Equator twice? The Congo River in Africa is the only river that crosses the Equator twice.
Q3: What is "4 O'clock Rain"? Due to high temperatures and intense convection at the Equator, heavy convectional rainfall occurs almost daily in the afternoon after 4 PM, known as "4 O'clock Rain".
Q4: How far is Nepal from the Equator? Nepal's southernmost border (Lodawari, Jhapa) is located approximately 2,900 km north of the Equator.
Enhance your geography Loksewa preparation with interactive quizzes and notes on our Loksewa Preparation App.