01
Nov
Explain How Scientists Classify Volcanoes According To Volcanic Activity. The four types of volcanoes they recognize are. These volcanoes are further classified as per their shape composite volcanoes cinder cones lava domes and shield volcanoes. Scientists classify volcanoes according to how explosively they erupt as well as their height and shape. Volcanologists frequently visit volcanoes especially active ones to observe volcanic eruptions collect eruptive products including tephra such as ash or.
Scientists use a wide variety of techniques to monitor volcanoes including seismographic detection of the earthquakes and tremor that almost always precede eruptions precise measurements of ground deformation that often accompanies the rise of magma changes in volcanic gas emissions and changes in gravity and magnetic fields. Scientists classify volcanoes according to how explosively they erupt as well as their height and shape. An active volcano is a volcano that has a record of eruption within the last 600 years or has erupted 10000 years ago based on analyses of its materials while an inactive volcano is the one that has no record of eruption for the last 10000 years and its physical form is being changed by agents of weathering and erosion through formation of deep and long gullies. Dormant volcanoes have not erupted for a very long time but may erupt at a future time. These volcanoes are further classified as per their shape composite volcanoes cinder cones lava domes and shield volcanoes. Shield cones are formed by lava and these are the largest volcanoes.
Dormant volcanoes have not erupted for a very long time but may erupt at a future time.
The general cycle of activity of andesitic and dacitic volcanoes may be described by quiescence phreatic explosive activity with the formation of a new crater and repeated dome building and destruction accompanied by explosions. Volcanoes come in many different shapes and sizes but are most commonly cone-shaped hills or mountains. They are found throughout the world forming ridges deep below the sea surface and mountains that are thousands of meters high. Volcanoes are the geologists window into the Earths interior. Volcanoes are classified as active dormant or extinct. If magma is thin and runny gases can escape easily from it.