BBCNEWS Newsday December 13, 2021 23:19:00
Molten rock moving from deep underground to the surface it off and breaks those rocks that are brittle and not irst hard crust of the surface. so we can detect earthquakes, that's one way we look for volcanic activity. other ways now are getting more sick for us to get it injected so we use a lot of satellite observation. from these it's not is not is hazardous to get on the ground, updating the crater of active volcanoes we use a lot of imaging techniques and this can also be detecting gas from satellite data so emissions, changes in the movement of the surface, by very small amounts. movemen...
Source: archive.org