How do you know when a volcano erupts?

Answer

According to the UCSB Geology Department, a volcanic eruption is defined as a volcanic event resulting in the emission of gases, lava, ash or other material from a volcano. These can manifest as a single eruptive pulse, an eruptive phase or an eruptive episode.

Eruptive pulses are a one-time emission, lasting a few seconds to a few minutes. Eruptive phases are eruptions that continue for a few hours or days, switching between ash and lava expulsion. Eruptive episodes are several connected eruptive phases over the course of several days, months or years. In a single eruption, the style, strength and ejected material may change hour by hour.

Q&A Related to "How do you know when a volcano erupts?"
Volcanoes erupt when rock inside the earth becomes so hot that it melts. The result is magma. Magma is lighter than rock and will rise around the rock. When it reaches the earths
http://www.ask.com/web-answers/Science/Nature/how_...
1. Look for plumes of smoke or clouds of gas on or around the volcano that aren't typically there. As magma flows into the chambers beneath a volcano and rises to the surface, it
http://www.ehow.com/how_2095755_predict-volcano-er...
A volcano erupts when pressure on the magma chamber causes the magma to rise and come out together with gas, rocks and ashes. Sometimes they are caused by earthquakes
http://wiki.answers.com/Q/How+do+volcano+erput
Eruptions happen when Earth's surface ruptures, allowing hot, molten rock, ash, & gases to
http://www.chacha.com/question/how-does-a-volcano-...
1 Additional Answer
Ask.com Answer for: how a volcano erupts
How to Make Volcanoes Erupt
Though it is not possible for one person to make a real volcano explode, making a model volcano explode can be a fun and educational experience. Below are the ingredients for red-hot good time.... More »
Difficulty: Moderately Easy
Source: www.ehow.com
Explore this Topic
A volcano erupts when the Earth's tectonic plates begin to shift and force molten lava up into the mouth of the volcano. These plates can remain dormant for millions ...
Volcanoes erupt to release pressure built up in the magma chamber by expelling the magma as lava. Along with lava, a volcanic eruption releases ash and greenhouse ...
A volcano erupts through the build-up and release of pressure, whether that pressure is of its underlying magma, water or both. This release can be explosive, ...
About -  Privacy -  Careers -  Ask Blog -  Mobile -  Help -  Feedback  -  Sitemap  © 2014 Ask.com