Periods of seismic quiet occur prior to volcanic eruptions: Scientists
Q. Periods of seismic quiet occur before which natural disaster, according to scientists?- Published on 27 Jun 16a. Tsunami
b. Earthquake
c. Fire
d. Volcano
ANSWER: Volcano
Periods of seismic quiet occur before volcanic eruptions and can be said to forecast impending eruption for restless volcanoes.
- When dormant volcanoes are about to erupt, predictive characteristics are show such as seismic activity beneath the volcano which starts to increase, causing gas to escape through the vent and the surrounding ground to become deformed.
- Till now, there had not been a way to predict the eruption of volcanoes before this.
- Diana Roman, a volcanologist at Carnegie Institution for Science in the US working with Pennsylvania State University, Oxford University and University of Iceland found periods of seismic quiet occur before eruptions and can be used to forecast eruption for restless volcanoes.
- Duration of the silence can indicate level of energy that will be released when the eruption occurs and longer periods may mean bigger eruptions.
- Of 50 explosions that occurred, 35 have preceding quiet periods lasting 30 minutes or more.
