Bikini Atoll

Bikini Atoll is a coral reef located in the Marshall Islands.

It sits at the northern end of the Ralik Chain. The atoll consists of 23 islands surrounding a large central lagoon.

Most of these islands are made of low coral limestone and sand. The average elevation is only about 2 meters above low tide level. The largest islet is Bikini Island, which is 2.5 kilometers long. The atoll is part of a larger system of islands and reefs. It is located northwest of the capital city, Majuro.

Before the mid-20th century, a community lived on these islands. The islanders followed a matrilineal social structure. This means land was passed down through the mother to her children. Families belonged to clans called Bwij. These clans owned all the land. Each clan had a chief known as an Iroij. The Iroij controlled land use and settled disputes. Below the chiefs were the Alap, who supervised daily activities. The Dri-jerbal were the laborers who worked the land.

The traditional lifestyle of the Bikini people was deeply connected to the sea. They were skilled boatbuilders and navigators. They used two-hulled boats called proas to travel between islets. Their diet included fish, shellfish, and cultivated plants. They grew coconut, papaya, banana, breadfruit, and taro. They also raised animals like pigs, ducks, and chickens.

This way of life was based on close family ties and hospitality.

After the Second World War, the United States chose the atoll for nuclear testing. In 1946, the military relocated 167 people from Bikini.

They first moved to Rongerik Atoll, but it lacked enough resources. The people experienced starvation by early 1948. They were eventually moved to Kwajalein Atoll and later to Kili Island. Between 1946 and 1958, the U.S. conducted 22 to 23 nuclear tests.

These tests took place on the reef, in the air, and underwater. The total yield of these explosions was about 77 megatons.

One famous test was the Castle Bravo detonation in 1954. This single test had a yield of 15 megatons.

The radiation and fallout from these tests were much more dangerous than scientists first believed. To understand the impact, researchers used a technology called HYSPLIT. HYSPLIT uses meteorological sciences to model and map nuclear fallout. Scientists used it to track the deposition of caesium-137 in the soil.

This data helped them estimate how much area was impacted by radionuclides.

The history of the atoll includes a difficult attempt at returning home. In 1972, about 100 residents voluntarily returned to Bikini. However, they could not stay for long. In May 1978, scientists found high levels of strontium-90 in the well water. They also found abnormally high concentrations of caesium-137 in the residents' bodies. The people had to be evacuated again in September 1978. This event showed that the contamination remained a serious problem.

Today, Bikini Atoll is a World Heritage Site. It is recognized for its role in the Cold War and the post-nuclear age. It is often described as an enclave of nature. While radiation levels are slowly decreasing, the islands are not fit for permanent living. It is not recommended to eat the local plants or wildlife.

The atoll is occasionally visited by scientists, divers, and a few caretakers. The people of Bikini now live in the United States and other Marshallese islands.