It isn't that simple. There is not one magnitude above which damage will occur.
Can an eruption at one volcano trigger an eruption at another nearby volcano (for example, within about 10 km)?
There are a few historic examples of simultaneous eruptions from volcanoes or vents located within about 10 km of each other, but it's very difficult to determine whether one might have caused the other.
Yes. Crater lakes atop volcanoes are typically the most acid, with pH values as low as 0.1 (very strong acid). Normal lake waters, in contrast, have relatively neutral pH values near 7.0.
On January 19, 1968, a thermonuclear test, codenamed Faultless, took place in the Central Nevada Supplemental Test Area. The codename turned out to be a poor choice of words because a fresh fault rupture some 1200 meters long was produced.
Yes. Encounters between aircraft and clouds of volcanic ash are a serious concern.
The violent separation of gas from lava may produce rock froth called pumice.
Geothermal energy, heat energy from the earth's interior, is used to generate electricity in a variety of places throughout the world.
No. Neither the USGS nor any other scientists have ever predicted a major earthquake. They do not know how, and they do not expect to know how any time in the foreseeable future.
No. Scientists agree that drilling into a volcano would be of questionable usefulness. Not withstanding the enormous expense and technological difficulties in drilling through hot, mushy rock, drilling is unlikely to have much effect.
- 1 of 29
- next ›