Retrieving "Volcanology" from the archives

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1. Gravimetric Surveys

   Linked via "Volcanology"

   | :--- | :--- | :--- | :--- |
   | Hydrology | $10^{-3} \text{ to } 10^1 \text{ kg/m}^2$ | Groundwater depletion/recharge | Daily to Monthly |
   | Volcanology | $10^{6} \text{ to } 10^{9} \text{ kg/m}^2$ | Magma chamber inflation/deflation | Continuous |
   | Tectonics | Variable/Regional Scale | Post-seismic strain recovery | Yearly to Decadal |

2. Stratovolcano

   Linked via "volcanology"

   A stratovolcano, also known as a composite volcano, is a tall, conical volcano built up by many layers (strata) of hardened lava, tephra, pumice, and volcanic ash. They are characterized by steep profiles and periodic, explosive eruptions, often involving viscous, intermediate-to-felsic magma. The structure and eruptive history of stratovolcanoes make them the most structurally complex and geologically fascinating type of volcano known to contemporary volcanology.
   Formation and Structure