subduction boundary eruption
The subduction
Convergent Boundary
Earthquakes are caused when pressure builds up as two tectonic plates move together. As the pressure is released, an earthquake is produced.
Lahar Indonesian term for a volcanic mudflow. Because they can occur before eruptions, after eruptions or without eruptions, they occur quite often.
Volcanoes are located throughout most of the world. The most active volcanoes are found on the so-called "ring of fire" in Pacific Ocean. Indonesia has several volcanoes including Krakatoa. Hawaii's Kilauea produces the most lava of all active volcanoes in the world. North America has Mt. St. Helens and Mt. Rainier in Washington, USA. Mexico has several including Parícutin and Nevado de Toluca. Europe has Mt. Etna. Generally, volcanoes are located near tectonic plates that are converging or diverging.
subduction boundary eruption
a
folded mountains
Volcanic eruptions occur only in certain places and do not occur randomly. That's because the Earth's outermost shell -- the lithosphere -- is broken into a series of slabs known as lithospheric ortectonic plates. These plates are rigid, but they float on the hotter, softer layer in the Earth's mantle. There are 16 major plates. As the plates move about, they spread apart, collide, or slide past each other. Volcanoes occur most frequently at plate boundaries.
Because diverging plate boundaries occur at mid-ocean ridges, this means the two lithospheric plates are spreading apart.
Earthquakes occur near faults and near the edges of plates in the earth's crust. Volcanic eruptions occur wherever a volcano is. Volcanic eruptions can occur when magma from below Earth's surface seeps through a weak spot in the crust. Volcanoes occur along plate boundaries, along the edges of plates, so this is where volcanoes occur also.
Tectonic plates can result in a variety of events when altered, however the main 4 are:EarthquakesLandslidesTidal WavesVolcanic Eruptions
The theory of plate tectonics helps to explain how earthquakes and volcanic eruptions occur.
The subduction
Convergent Boundary
Most common would be a fissure eruption of basaltic magma.
Earthquakes are caused when pressure builds up as two tectonic plates move together. As the pressure is released, an earthquake is produced.