I think its called the 'summit' Crater....
A saucer-shaped depression at the mouth of a volcano is called a volcanic caldera. Calderas are formed when a volcano collapses into the emptied magma chamber below, creating a large, basin-like crater.
Vent .
A live volcano is simply called an active volcano.
The Volcano has a huge structure below it. The molten rock deep within it is called Magma. A subsidiary volcano may form from the main body, this is called a Parasitic cone. Some times some volcanic materials may seep out near the volcano, this opening is called Vent. The molten rock erupting from the Volcano is called Lava. The mouth of the volcano is called Crater. The highest point of a volcanic mountain is called Summit while the underground passage of magma is called Conduit. The Channel through which lava is ejected out is called the Throat. Ash or fragments of rocks and lava are what is blasted out forming Ash clouds due to the explosion
Crater
You are asking about the mouth.
You are possibly looking for Caldera.
A saucer-shaped depression at the mouth of a volcano is called a volcanic caldera. Calderas are formed when a volcano collapses into the emptied magma chamber below, creating a large, basin-like crater.
Vent .
The mouth of a volcano is called the "vent." This is the opening through which volcanic materials, such as lava, ash, and gases, are expelled during an eruption. Vents can vary in size and may occur at the summit or along the sides of the volcano. In some cases, the vent can lead to a crater, which is a bowl-shaped depression formed around the vent.
The opening top of the volcano is called a crater. The super-heated gases and ash billows out of the mouth of hell before the magma erupts out destroying all in its path.
the mouth of the volcano, or caldera.
volcano
A live volcano is simply called an active volcano.
Crater
a cave
The Volcano has a huge structure below it. The molten rock deep within it is called Magma. A subsidiary volcano may form from the main body, this is called a Parasitic cone. Some times some volcanic materials may seep out near the volcano, this opening is called Vent. The molten rock erupting from the Volcano is called Lava. The mouth of the volcano is called Crater. The highest point of a volcanic mountain is called Summit while the underground passage of magma is called Conduit. The Channel through which lava is ejected out is called the Throat. Ash or fragments of rocks and lava are what is blasted out forming Ash clouds due to the explosion