Enewetak Atoll

Enewetak is a group of 40 small islands.

It sits in the Pacific Ocean. It is part of the Marshall Islands.

The islands surround a deep pool of water. This pool is called a lagoon. The land is very low to the sea. It sits on top of a mountain under the water.

A long time ago, the US used the islands for tests. These tests were very big. They left some soil that was not safe.

People built a large concrete dome to hold the soil. This dome sits on Runit Island. It was made to keep the soil in one place.

Today, about 296 people live there. They have a school for children. It is a special place in the ocean.

Enewetak Atoll is a group of 40 islands.

These islands sit in the Pacific Ocean. They are part of the Marshall Islands. The islands form a ring around a deep pool of water. We call this pool a lagoon.

The land is very low. It sits on top of a mountain under the sea. This mountain is made of basalt, which is a dark rock.

Enewetak has a long history. People have lived there for a very long time. During World War II, the United States and Japan fought for control of the islands. Later, the United States used the atoll for nuclear tests. These tests were very powerful. One test was so big it wiped out an entire island.

To clean up the area, the military moved unsafe soil. They put the soil in a large crater on Runit Island. Then, they built a thick concrete dome over it.

This is called the Runit Dome. Today, about 296 people live in the atoll. They have a local school for children.

Enewetak Atoll is a large group of 40 islands in the Pacific Ocean.

It is part of the Ralik Chain in the Marshall Islands. The islands form a ring around a deep central pool called a lagoon.

This atoll sits west of Bikini Atoll. The land is very low to the sea. Most of it is only a few meters above the water. The islands actually sit on top of a huge underwater mountain. This mountain is made of basalt rock. It formed a long time ago during the Cretaceous period. Today, the mountain is mostly below sea level. This happened because the whole region has slowly sunk over time.

History has changed these islands many times. People first settled here about 1,000 B.C. using Austronesian boats. A Spanish explorer named Álvaro de Saavedra Cerón arrived in 1529. He called the islands "Los Jardines," which means "The Gardens." Later, British sailors called them "Brown's Range" in 1794. In 1914, Japan took control of the islands. They held them until the United States captured the atoll in February 1944. This happened during World War II.

During the battle, much of the fighting took place on Engebi Island. The United States then turned the area into a large naval base.

After the war, the United States used the atoll for nuclear testing. This happened between 1948 and 1958. The tests were incredibly powerful. One test, named Ivy Mike in 1952, was a hydrogen bomb. It was so strong that it vaporized the entire island of Elugelab. This test even created two new chemical elements. These are called Fermium and Einsteinium. Many local residents had to leave their homes during this time. The United States also had to move the bodies of fallen servicemen before the tests began. These tests changed the islands forever.

To clean up the area, the military started a big project. They wanted to remove radioactive soil and debris from the islands. Between 1977 and 1980, they mixed this material with cement. They buried it in a large crater on Runit Island. This crater was made by a nuclear test called "Cactus" in 1958.

To cover the waste, they built a huge concrete dome. This structure is made of 358 thick concrete panels. The cleanup cost the government $239 million. Today, there are concerns that rising sea levels could cause leaks in the dome.

Life on Enewetak Atoll continues today with about 296 people. The islands are part of the Marshall Islands, which became independent in 1986. Children go to the local Enewetak Elementary School. There is also a special fund to help people deal with damages from the nuclear tests. This fund was created through an agreement between the two nations. Most of the atoll may be safe for people to live on by 2027. This will happen as the radiation naturally decays over time. It is a place where history and nature are closely linked.

Enewetak Atoll is a vast coral atoll located in the Pacific Ocean.

It consists of 40 islands that form a ring around a deep central lagoon. The atoll is part of the Ralik Chain within the Marshall Islands. It sits west of Bikini Atoll and is the second-westernmost atoll in its chain. As of 2021, the atoll is home to 296 people. These residents form a legislative district of the Marshall Islands. The land is very low, with a mean elevation of only 2 meters above sea level.

The physical structure of the atoll has a deep geological history. It formed on top of a large seamount, which is an underwater mountain. This seamount was created during the late Cretaceous period. The mountain is composed of basalt, a type of volcanic rock. Today, the seamount sits mostly below sea level. This is not due to erosion of the rock. Instead, the entire region has undergone a process called subsidence. This means the seafloor and the mountain have slowly sunk over time.

Human history on the atoll began around 1,000 B.C. Austronesian islanders were the first people to settle the islands. European contact began in 1529 with the Spanish explorer Álvaro de Saavedra Cerón. He named the islands "Los Jardines," or The Gardens. In 1794, British sailors called the area "Brown's Range." This name later led the Japanese to call it Brown Atoll. The islands were part of a German colony starting in 1885. In 1914, the Imperial Japanese Navy captured the atoll during World War I.

World War II brought intense conflict to the atoll. In November 1942, the Japanese built an airfield on Engebi Island. They used it to refuel planes traveling between Truk and eastern islands. In early 1944, the Japanese assigned the 1st Amphibious Brigade to defend the atoll. This brigade included about 2,586 men. However, they could not finish their fortifications before the American attack in February 1944.

The Americans captured the atoll during a five-day operation. Much of the fighting occurred on Engebi Islet and Parry Island. Following the battle, the United States established Naval Base Eniwetok. The lagoon became a massive anchorage for ships. During July 1944, the daily average of ships in the lagoon reached 488.

After the war, the United States used the atoll for nuclear weapons testing. This occurred between 1948 and 1958 as part of the Pacific Proving Grounds. A total of 43 nuclear tests were conducted there. One major event was the Ivy Mike test in late 1952. This was the first hydrogen bomb test. The explosion was so powerful that it vaporized the islet of Elugelab. The test even created two new chemical elements: Fermium and Einsteinium. During this era, the U.S. government often evacuated local residents from their homes.

To manage radioactive waste, the military began a massive cleanup project. Between 1977 and 1980, they worked to decontaminate the islands. They mixed more than 61,000 cubic meters of contaminated soil and debris with Portland cement. This mixture was buried in a large crater on Runit Island. This crater was created by the "Cactus" nuclear test in 1958.

To cover the waste, engineers built the Runit Dome. This structure is made of 358 concrete panels, each 1.2 meters thick. The entire cleanup project cost $239 million. There are modern concerns that rising sea levels could breach the dome.

Today, Enewetak Atoll is part of the independent nation of the Marshall Islands. The relationship between the U.S. and the Marshall Islands is guided by a formal agreement. This includes the Compact of Free Association, ratified in 1986. A special fund was created to help people harmed by nuclear testing. A Marshall Islands Nuclear Claims Tribunal was also established to manage these claims. The atoll remains a place of significant scientific and historical importance. Experts project much of the atoll may be fit for habitation by 2026 or 2027.