Volacno

• Volcano- is a rupture in the crust of a planetary mass object such as Earth That Allows Hot Lava,volcanic ashes and Gases to escape from magma chamber below the surface
• Tsunami - is a series of ocean waves that are generated when there's an earthquake beneath the sea floor or when an underwater volcano erupts.
• Earthquake - is a sudden shaking of the ground caused by the breaking or movement of rocks within the earth
• Volcanoes


  • Most often found where tectonic plates are diverging or converging
  • Most volcanoes are found underwater as most of Earth's plate boundaries are underwater
• Volcanoes caused by divergent tectonic plates

  • Mid-ocean ridge, such as the Mid-Atlantic Ridge
• Volcanoes caused by convergent tectonic plates

  • Pacific Ring of Fire
• Volcanoes


  • Can also form where there is stretching and thinning of the crust's plates, such as in the East African Rift and the Wells Gray-Clearwater volcanic field and Rio Grande rift in North America
• Volcanism away from plate boundaries

  Arises from upwelling diapirs from the core–mantle boundary, 3,000 kilometers (1,900 mi) deep within Earth, resulting in hotspot volcanism, of which the Hawaiian hotspot is an example
• Volcanoes are usually not created where two tectonic plates slide past one another
• According to the theory of plate tectonics, Earth's lithosphere, its rigid outer shell, is broken into sixteen larger and several smaller plates. These are in slow motion, due to convection in the underlying ductile mantle, and most volcanic activity on Earth takes place along plate boundaries, where plates are converging (and lithosphere is being destroyed) or are diverging (and new lithosphere is being created).[6]
• During the development of geological theory, certain concepts that allowed the grouping of volcanoes in time, place, structure and composition have developed that ultimately have had to be explained in the theory of plate tectonics. For example, some volcanoes are polygenetic with more than one period of activity during their history; other volcanoes that become extinct after erupting exactly once are monogenetic (meaning "one life") and such volcanoes are often grouped together in a geographical region.[7]