Supply Reef facts for kids
Quick facts for kids Supply Reef |
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 Location in Northern Mariana Islands
Location in North Pacific
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| Summit depth | −8 m (−26 ft) |
| Location | |
| Location | Northern Mariana Islands |
| Coordinates | 20°08′N 145°6′E / 20.133°N 145.100°E |
| Country | United States |
| Geology | |
| Type | Submarine volcano |
| Last eruption | September to December 1989 |
Supply Reef is an underwater reef that was formed by a volcano. It is found in the Northern Mariana Islands, which are a group of islands in the Pacific Ocean. This reef is about 10 kilometres (6 mi) northwest of the Maug Islands.
Supply Reef is currently about 8 metres (26 ft) below the surface of the ocean. It is shaped like a circle and is about 100 m (300 ft) wide.
What is Supply Reef?
Supply Reef is a special type of underwater mountain called a seamount. It is made of volcanic rock. This means it was created by lava flowing out from under the sea.
Even though it is called a reef, it is not made of coral like many other reefs. Instead, it is a rocky structure formed by volcanic activity.
Volcanic Activity
Supply Reef is known for its underwater volcanic eruptions. These are called submarine volcanism. This means the volcano is active beneath the ocean's surface.
One time, in 1989, there were clear signs of eruptions. These happened between December 22-24 and again on December 26-27. This shows that Supply Reef is still an active underwater volcano.
