Following a volcanic eruption, what feature indicates renewed magma ascent to form a lava dome?

💡 Explanation

Heightened sulfur dioxide emissions indicate magma rising toward the volcano's surface which precedes dome formation because degassing increases with proximity to the surface through convection; therefore heightened gasses, rather than seismic changes, are the indicator.

• Which risk increases when differential erosion affects coastlines?
• Which soil consequence results when increased water runoff accelerates weathering?
• Which geographic outcome increases surrounding arable land degradation when overgrazing eliminates vegetation?
• Which outcome results when hydraulic sorting affects littoral drift composition?
• Which process accelerates the creation of loess deposits where glaciers retreated, because permafrost thawing enhances bioturbation?
• Which process exacerbates liquefaction during seismic activity, resulting in structural instability?