where do most earthquake and volcano occur
Answers
Answer: At diverging plate boundaries, earthquakes occur as the plates pull away from each other. Volcanoes also form as magma rises upward from the underlying mantle along the gap between the two plates. We almost never see these volcanoes, because most of them are located on the sea floor.
All plate boundaries have earthquakes because this is where rigid tectonic plates are moving together, apart, or sliding past one another. However, deep focus earthquakes are only found where a dense oceanic plate is being subducted because everywhere else the plate is becoming at least partially molten with depth and is too ductile to break, rebound elastically, and release seismic energy. The possible depth of quakes depends on the thickness of the rigid upper layer called the lithosphere.
Volcanoes are found at 2 of the 3 types of plate boundaries — convergent & divergent, but not transform — and the types of volcanic activity are very different. “Gently" erupting volcanoes making shield volcanoes, lava plateaus, and pillow basalts are commonly found at divergent boundaries due to the high temperature and low silica content of the lava over areas of mantle upwelling. At convergent boundaries, we only find volcanoes where a plate is subducting and melting into a cooler, higher-silica, more explosive magma that typically creates composite volcanoes like in the Andes, Cascades, Philippines, Japan, Aleutians, etc. These go dormant for long stretches, look like regular mountains, but periodically go BOOM. Continent to continent collisions do not create volcanoes because continental crust is too low-density to subduct. Additionally, hot spot volcanoes can form over a deep mantle plume and create random volcanoes anywhere on Earth.
sry its a loooooooooooooooong process