Moruroa is a small place in the sea.
It is in French Polynesia. The water is blue and warm.
Long ago, many big tests happened here. Now, people do not live there. It is a quiet place. Would you like to see the ocean?
Moruroa is a ring of land in the sea.
It is in French Polynesia. This place is in the Pacific Ocean.
A long time ago, many people lived here. Now, no one lives there. The land is part of a group of islands.
France used this place for big tests. These tests were very powerful. They caused many people to protest.
Some tests happened in the air. Other tests happened deep under the ground. One test caused a big wave in the sea.
It is hard to visit Moruroa now. The land is not safe. It is still watched by guards.
Moruroa is an atoll in the Pacific Ocean.
An atoll is a ring of land around a lagoon.
It sits in French Polynesia. It is part of the Tuamotu Archipelago. The map shows where it sits in the sea.
Many people visited this place in the past. A man named Philip Carteret saw it in 1767. Later, people used the land to work with copra. Copra is dried coconut meat. No one lives on the atoll now.
France used Moruroa for nuclear tests. They did this from 1966 to 1996. Some tests were in the air. Others were deep under the ground. These tests caused many people to protest.
One test in 1979 was very big. It caused a landslide under the sea. This made a wave called a tsunami. Now, the land is not safe to visit. There is high radiation there. French forces still guard the atoll. Scientists study the land to see if it will collapse.
Moruroa is a special kind of land called an atoll.
An atoll is a ring of land that goes around a central lagoon.
This atoll sits in the southern Pacific Ocean. It is part of the Tuamotu Archipelago in French Polynesia. You can find it about 1,250 kilometres southeast of Tahiti.
The map shows exactly where this ring of land sits in the sea. It is part of a group of places called the commune of Tureia. This group also includes the atolls of Fangataufa, Tematangi, and Vanavana.
Many different people have visited this place over the years. A commander named Philip Carteret first visited in 1767. He gave the atoll a very long name. Later, a British ship called the Matilda crashed there in 1792. Because of this, people called the area Matilda's Rocks. Explorers found that very few people lived there. Some people worked there to make copra in the late 1800s. Other workers lived there briefly between 1942 and 1952. However, no one has lived there permanently since those times.
Between 1966 and 1996, France used Moruroa for nuclear weapon tests.
This changed the atoll in many ways. At first, France did tests in the air. They used balloons, bombers, or even barges for these. There were 41 of these atmospheric tests. Later, they moved to testing deep underground. They drilled long shafts into the volcanic rocks. They placed the devices at the bottom of these holes. This was done to keep the explosions under the ground.
These tests caused many problems and big protests. In 1973, ships from New Zealand came to protest. In 1995, people all over the world protested again. One test in 1979 was especially dangerous. A device got stuck halfway down an 800-metre shaft. When it exploded, it caused a large landslide under the sea. This landslide created a tsunami that hit the atoll. It also caused a long crack to appear in the land. Some reports say there were 175 or 181 total explosions.
Today, Moruroa is a very different place than it was before. It is not safe for people to visit right now. This is because there is a lot of radiation there. The French government still keeps guards on the atoll.
Scientists are still studying the area today. They want to know if the atoll might collapse. They use sensors to watch the land very closely. They also study how the old tests affected the health of people nearby. It is a place that people are still learning about.
Moruroa is an atoll located in the southern Pacific Ocean.
An atoll is a ring-shaped coral reef that surrounds a central lagoon.
This atoll is part of the Tuamotu Archipelago within French Polynesia. It sits approximately 1,250 kilometres southeast of Tahiti. Administratively, it belongs to the commune of Tureia. This commune also includes the atolls of Fangataufa, Tematangi, and Vanavana. Moruroa is most famous for its history as a site for nuclear testing.
The history of European contact with Moruroa began in the 18th century. Commander Philip Carteret first visited the atoll in 1767. He named the location "Bishop of Osnaburgh Island." In 1792, the British whaler Matilda was wrecked on the atoll. This event led people to call the area "Matilda's Rocks." Later, Frederick William Beechey visited the site in 1826. Early explorers noted that the atoll was not continuously inhabited. While copra workers lived there briefly in the late 19th century and again between 1942 and 1952, there has been no permanent population since those times.
Between 1966 and 1996, France used Moruroa and Fangataufa for extensive nuclear weapon tests.
The French government established the Direction des Centres d'Expérimentations Nucléaires, or DIRCEN, on 21 September 1962. This agency was created to administer the testing operations. Infrastructure construction began in May 1963. To support these operations, the atoll of Hao was used as a base. Hao is located 245 nautical miles northwest of Moruroa. These tests fundamentally changed the environment and the political landscape of the Pacific.
Nuclear testing at Moruroa occurred in two distinct stages. The first stage involved atmospheric nuclear tests. These were explosions conducted in the air or on the surface. Between 1966 and 1974, France conducted 41 atmospheric tests. Scientists used different methods to detonate these devices. Some were placed on barges, while others were air dropped from bombers. Many devices were also suspended from helium-filled balloons. One method involved a device suspended from a balloon, which President Charles de Gaulle observed in person on 10 September 1966.
Due to intense international pressure, France moved to underground testing in 1974. This change followed protests, such as when New Zealand sent two frigates, HMNZS Canterbury and Otago, to the atoll in July 1973. For underground tests, workers drilled deep shafts into the volcanic rocks underlying the atolls. The nuclear devices were then detonated at the bottom of these shafts. However, this method caused significant geological concerns. Scientists observed cracking in the atolls, a phenomenon known as "tired mountain syndrome." This raised fears that radioactive material could escape into the ocean.
One major accident occurred on 25 July 1979 during an underground test. The nuclear device became stuck halfway down an 800-metre shaft. Because it could not reach the bottom, it was detonated at half the usual depth. This explosion triggered a large submarine landslide on the southwest rim of the atoll. A significant portion of the outer slope broke loose. This event caused a tsunami that affected Moruroa and injured workers. The blast also created a crack 2 kilometres long and 40 centimetres wide.
The testing era ended following a period of intense global controversy. In 1995, President Jacques Chirac decided to conduct another series of tests. This decision caused worldwide protests and an embargo on French wine. Riots also occurred throughout Polynesia. The last nuclear test at Moruroa took place on 27 December 1995. The final test in the region occurred on Fangataufa on 27 January 1996. Reports on the total number of explosions vary. Some sources state there were 181 explosions at Moruroa, while some scientists claim 175 total explosions occurred in the Pacific.
Today, Moruroa remains a site of scientific and environmental concern.
As of October 2005, visiting the atoll is prohibited due to high radioactive contamination. The area is still guarded by French Forces. A 2012 report indicated that only 11 of the 20 monitoring sensors were functional. This suggests the atoll could potentially collapse without warning. Additionally, researchers continue to study the health consequences of the tests. In 2021, the institute INSERM published a study regarding the health of the general population and former workers in French Polynesia.
Where will your curiosity go next?
🖼️ Images & Media (10)
More to explore
✨ What else?
Related topics you might enjoy
🔬 Go deeper
More advanced topics to explore
What is Nepedia?
A free, ad-free encyclopedia for children. Every article is written at five reading levels, so the same page works for a five-year-old and a fifteen-year-old — use the level switcher above to see this one change. No account needed to read.