Prominence Eruptions

Laboratory simulations of solar prominence eruptions*

Spheromak technology is exploited to create laboratory simulations of solar prominence eruptions. It is found that the initial simulated prominences are arched, but then bifurcate into twisted secondary structures which appear to follow fringing field lines. A simple model explains many of these topological features in terms of the trajectories of field lines associated with relaxed states, i.e...

Experimental Demonstration of How Strapping Fields Can Inhibit Solar Prominence Eruptions

It has been conjectured that the eruption of a solar prominence can be inhibited if a much larger scale, arched magnetic field straddles the prominence and effectively straps it down. We have demonstrated this effect in a laboratory experiment where a vacuum strapping field acts on a scaled simulation of a solar prominence. The required magnitude of the strapping field is in good agreement with...

Volcanic Eruptions

Drug eruptions.

The last four decades have seen an enormous increase in the use of potent and toxic drugs as therapy. The considerable advances that these drugs have provided in the control and prevention of disease are matched by their potential to produce unwanted side effects many of which are reflected in the skin. These side effects cannot in the main be predicted. Tests in animals may not reliably be ext...

Dynamics of Lake Eruptions and Possible Ocean Eruptions

Dissolved gas in liquid is able to power violent eruptions. Two kinds of such gas-driven eruptions are known in nature: explosive volcanic eruptions driven by dissolved H2O in magma at high temperatures and lake eruptions driven by dissolved CO2 in water at low temperatures. There are two known occurrences of lake eruptions, one in 1984 (Lake Monoun) and one in 1986 (Lake Nyos), both in Cameroo...