Sentences with phrase «suspect volcanic activity»

Just what triggered this enormous emission is not known, but scientists suspect volcanic activity may have begun the process.

Not exact matches

At first, they suspect only volcanic activity, but one young executive dares to wonder if it may be something different... something alive.

It has long been suspected that the low solar activity during the Maunder Minimum was one of the causes of the Little Ice Age, although other factors like a small drop in greenhouse gas concentrations around 1600 and strong volcanic eruptions during that time likely played a role as well.

Of the five species die offs in the last 500 million years, three are suspected of being caused by warming that included high co2 atmospherics levels from high volcanic activity.