The Hall Islands are in the sea. 
The Hall Islands are in the sea. 

The Hall Islands sit in the north of Chuuk. 
Two large atolls make up the main group. One is Nomwin. It is in the west. The other is Murilo. It is in the east. They are about 9 km apart. They sit on a twin-lobed seamount. A seamount is a mountain under the sea. 
More than 1,000 people live on Nomwin. More than 1,000 people live on Murilo. They are about 100 km north of Chuuk Lagoon. Some people also include East Fayu in the group. East Fayu is a small atoll. It is more than 30 km west of Nomwin. No one lives on East Fayu.
The three atolls have many small islands. These are called islets or motus. There are more than 50 of them. All together, they have 3.5 km2 of dry land. 
The Hall Islands are a special group of islands. They sit in the northern part of Chuuk. Chuuk is a state in the Federated States of Micronesia. 

These atolls sit on top of a seamount. A seamount is a mountain under the sea. This mountain has two lobes, which look like two rounded parts. The two large atolls are the parts of the mountain that stick out of the water. One atoll is named Nomwin. It sits in the west. The other is named Murilo. It sits in the east. They are about 9 km apart. 
Many people call these islands home. Both Murilo and Nomwin have many residents. Each atoll has more than 1,000 people living there. 

There is a lot of small land in this area. The three atolls have more than 50 islets. An islet is a very small island. These are also called motus. 

You can see the shape of these islands from space. A Landsat picture shows the islands clearly. 

The Hall Islands are a distinct group of atolls. They are located in the northern part of Chuuk. Chuuk is a state within the Federated States of Micronesia. 

These islands sit atop a massive underwater feature. This feature is known as a seamount. A seamount is a mountain that rises from the ocean floor. The seamount under the Hall Islands has two lobes. These lobes are two rounded parts of the mountain. The two large atolls are the emergent parts of this seamount. Emergent means they have risen above the sea level. They appear as land on the surface of the ocean. 
The group consists of two primary atolls. The western atoll is named Nomwin. The eastern atoll is named Murilo. These two landforms sit about 9 km apart. 

Human life is a major part of these atolls. Both Nomwin and Murilo are inhabited. Each of these atolls has a population of more than 1,000 people. This means many residents call these remote atolls home. They are located roughly 100 km north of Chuuk Lagoon. This distance places them far from the main lagoon area. The people live on the small pieces of land that make up the atolls. 
The physical landscape is made of many tiny islands. These small islands are called islets. In this region, they are also called motus. The three atolls together contain more than 50 motus. These islets are the visible parts of the larger reef structures. They provide the only dry land in the area. The total dry surface area is approximately 3.5 km2. This is the combined measurement of all the motus. 
Satellite technology helps us see the layout of the islands. A Landsat picture provides a clear view from above. 

The Hall Islands demonstrate how geology shapes geography. The twin-lobed seamount dictates where the land sits. The shape of the mountain under the water creates the two atolls. This connection between the deep ocean and the surface is vital. It explains why the islands are spaced the way they are. The geography of the region is a direct result of this underwater mountain. 
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