<span> The </span>Hawaiian Islands<span> are fixed, but </span>volcanic arcs can<span> move as tectonic plates slowly spread apart. The </span>Hawaiian Islands formed<span> over a hot spot; a</span>volcanic arc<span> forms when one lithospheric plate is subducted under another one.</span>
Answer:
Geologist can use the following pieces of evidence in predicting future eruption;
1)Frequency of localize Earthquakes.
2)Gas Emissions.
3)Remote monitoring.
4)History of Volcanic Activity
Explanation:
<u>Frequency of Localize Earthquakes</u><u>:Geologists</u> use seismographs that record the length and strength of each earthquake to try to determine if an eruption is imminent.
<u>Gas emissions</u>:Gases may be able to escape a volcano before magma reaches the surface. Geologists measure gas emissions in vents on or around the volcano.The amounts of gases and their ratios are calculated to help predict eruptions.
<u>Remote Monitoring</u>:Some gases can be monitored using satellite technology. Satellites also monitor temperature readings and deformation. As technology improves, Geologist are better able to detect changes in a volcano accurately and safely.
<u>History of Volcanic Activity</u>:A volcano’s history, how long since its last eruption and the time span between its previous eruptions, is a good first step to predicting eruptions.
Answer:Surface water seeps into the ground and recharges the underlying aquifer—groundwater discharges to the surface and supplies the stream with baseflow.
Explanation:
What are some effects of groundwater depletion? Pumping has removed water from storage in basalt aquifers and caused declines in many areas of the Columbia Plateau. The most severe consequence of excessive groundwater pumping is that the water table, below which the ground is saturated with water, can be lowered.