Sri Lanka to Experience Solar Zenith

Sun Directly Overhead from August 28 to September 7

 The Sun is set to shine directly overhead in several regions of Sri Lanka from today, August 28, through September 7, as part of a natural astronomical event known as solar zenith. This rare occurrence happens when the Sun reaches its highest point in the sky, directly above certain locations due to the Earth’s axial tilt and its orbit around the Sun.

The Forecasting Division of the National Meteorological Centre confirmed that during this period, the Sun will appear directly above Sri Lanka's northern and northeastern regions, casting minimal shadows and resulting in unusually intense midday sunlight. This event, caused by the Sun's apparent southward motion, will be most noticeable around 12:11 PM (noon).

Key Locations to Experience the Solar Zenith

According to the Department of Meteorology, the following areas will experience the Sun directly overhead:

Kumulamunai

Padinaddampore

Alankulam

Thanniyuttu

Vettappalai

Mullaitivu

These locations, situated primarily in the northern and northeastern parts of the island, will experience the phenomenon around 12:11 PM each day. For residents and visitors in these regions, the Sun’s direct overhead position will result in very short or virtually no shadows during the peak of the day.

What Does It Mean When the Sun is Directly Overhead?

This rare event is a result of the Earth's tilt of approximately 23.5 degrees and the way the Earth orbits around the Sun. When the Sun is directly overhead, it’s at what scientists call the solar zenith. For those in Sri Lanka, this will occur twice a year, due to the island's position between the Tropic of Cancer and the Tropic of Capricorn.

At solar noon, the Sun will be at a 90-degree angle relative to the ground, and this can lead to some fascinating visual effects. One notable outcome is the absence of shadows, or extremely short ones, as objects are directly aligned with the Sun’s rays. Additionally, the concentrated sunlight can lead to a temporary increase in local temperatures.

Why Does This Happen?

The Earth’s axial tilt causes different regions to receive varying amounts of solar energy throughout the year. For those living near the equator, the Sun can be directly overhead twice annually — once around March and once in September — depending on the Earth’s position in its orbit. This event is most pronounced between the Tropics of Cancer and Capricorn, the two latitudes that mark the farthest points at which the Sun can be directly overhead.

What to Expect During Solar Zenith

For the people of Kumulamunai, Padinaddampore, Alankulam, Thanniyuttu, Vettappalai, and Mullaitivu, this is a time to witness one of nature’s most striking displays of solar power. The intense sunlight could result in hotter temperatures, especially at noon. Experts recommend taking precautions during the midday hours, particularly avoiding prolonged exposure to the Sun without protection.

Meteorologists have advised the public to take extra care during this period, especially in the northern regions, where the heat might feel more intense. Sunscreen, protective clothing, and staying hydrated are some of the steps that can help mitigate the effects of this solar event.

A Glimpse Into the Future: Solar Phenomena

As the Earth continues its orbit and axial tilt, the Sun will again reach its zenith in the northern and southern hemispheres in coming years. For Sri Lanka, the event serves as a reminder of the fascinating relationship between Earth and Sun, and how celestial mechanics influence our daily lives.

So, whether you’re basking in the direct sunlight or seeking refuge under the shade, this solar zenith is a rare spectacle that showcases the intricate workings of our solar system.