Well it depends on how bad the lava flow is. If the lava is flowing slow then the shape of the volcano won't change much, But if it flows with force then bits of the volcano will fall off and change the shape of the volcano. Hope this answer helps!!
Thevolcanologist's know that there is going to be an earthquake is from these signs * The volcano will swell up and change shape. * Small earthquake will occur. * The surface temp will increase around the volcano. * The volcano will emit bad small.
A conical volcano is the name given to a land form that has the shape of a volcano. A hill could be call a conical volcano when it is formed due to the debris from an eruption that forms the same shape as the volcano.
The basic shape of a volcano is like that of a cone with it's bottom faced downwards towards the earth and the top pointy hole part facing upwards towards the sky! However there is a type of volcano which has a plain shape and that is a dead or an extinct volcano! Cone
This type of volcano is described as dormant. Another level is inactive. This describes a volcano for which there is no record of eruption (unlike dormant), and the volcano's shape and structure is beginning to change due to weathering and erosion.
The shape tells a geologist how viscous (thick and sticky) the lava was. A taller volcano, such as a cone, was formed by thicker lava; a low volcano, such as a shield volcano, was formed by very runny lava.
The shape of the volcano is influenced by the reaction of the different types of lava, if it cools fast therefore the cone will be steep in shape if the lava flows a long distance before cooling it gives the volcano a long gentle slope.
Before a volcano erupts, there is normally an increase in earthquakes, you might see some volcanic ash come out, you might see an increase in gas or steam around the volcano, and you might see a change in height or shape of the land around the volcano.