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JoyfulSilence · 51-55, M
Well, rising magma and gases under high pressure put strain on rocks which causes fractures (earthquakes).
In fact, that is one way scientists can predict volcanic eruptions, by measuring seismic activity. As well as heat, gases, elevation changes, etc.
And earthquakes cause fractures that magma can fills in.
Like in Iceland, where a plume of rising heat and magma causes the crust to dome up, then crack, and spread. The cracks relieve pressure, like an opening soda bottle, which causes the gases to bubble and magma to erupt into the cracks, forming fissure eruptions.
In fact, that is one way scientists can predict volcanic eruptions, by measuring seismic activity. As well as heat, gases, elevation changes, etc.
And earthquakes cause fractures that magma can fills in.
Like in Iceland, where a plume of rising heat and magma causes the crust to dome up, then crack, and spread. The cracks relieve pressure, like an opening soda bottle, which causes the gases to bubble and magma to erupt into the cracks, forming fissure eruptions.


