What will increase the flow of magma?

Answer 1

The more mafic mineral, the more fluent the magma. In other words, basalt-rich magma is more flowing and felsic-rich magma is more viscous. So, the mafic composition increase the flow of magma. Example: balsalt-islands of Hawaii, very flowing, spreads readily. St. Elens Montain rich in andesite, which is a less mafic rock, is more viscous;thus, more explosive.

Answer 2

The build up of materials jsut below the surface begins to compact and create a LOT of pressure resulting in bigger explosions with the ratio, magma:rock. Also the intense heat build up further increases pressure.

Answer 3

The processes that effect the explosive yield of a magma chamber is still theoretical, however there are some facts that are known about it. There are several different factors both hypothetical and demonstrated that can change the workings of a magma chamber. First and foremost is the viscosity of the magma in the chamber, the more viscous the magma the higher potential it has to be able to explosively decompress the gas that is dissolved within. There is also the case of potential volatiles that could be present within the magma chamber, exactly how certain volatiles interact with the gasses and magma present within the chamber is not well understood as we cannot physically go into it. The other major concept that is being developed is how major earthquakes within the region can "Shake Up" the existing magma chamber that is present below a volcano. This shake up can potentially cause a premature release of dissolved gasses within a highly viscous magma chamber causing both a highly explosive and unpredicted eruption (Which if in a heavily populated area can greatly hinder or completely eliminate an evacuation attempt). The other occurance that has been known to increase explosivity activity that there has been evidence for in certain volcanoes is when a Rhyolitic magma chamber gets a fresh injection of very fresh and hot Basaltic magma. This injection can rapidly increase the temperature of the chamber itself causing great instability within a balanced magma Plumbing system under a volcano. The other major cause which has been witnessed at Mt. St. Helens in the 2004-2006 eruption is that without a fresh source of magma within a chamber the gasses will slowly escape over time and when erupted even the most viscous magma can be empty of dissolved gas causing a very placid eruption.

Answer 4

gases