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Why would a sudden increase of earthquake activity around a volcano indicate a possible eruption.?
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How do volcanologists know that when a volcano will erupt?
There may be a number of warning signs!An increase in seismic activity - the movement of magma into the magma chamber below the volcano which normally occurs before a volcanic eruption occurs causes an increase in small earthquakes which can be detected by seismometers. As the pressure builds, so does the number and size of these earthquakes.Shape changes - the earth's surface may begin to bulge due to the pressure of the magma. This occurred before the eruption of Mt. St Helens and can be monitored by scientists using a number of differing tools and sensors.A change or increase in the volume and composition of gasses and vapours emitted from the volcanic vent may also be a warning of increased volcanic activity or an impending eruption.A increase in temperature or a change of the chemical composition of groundwater may also indicate that an eruption is imminent.However these are all just guides that may help to warn of an eruption, but they are not a guarantee that it can be predicted.
When does a volcano eruption begin?
A volcanic eruption starts with the build up of pressure in the magma chamber. A bulge in the crater may indicate a impending eruption. Earthquakes may also precede an eruption.
What instrument produces patterns which indicate earthquake?
seismograph
Why can earthquakes be a warning sign that a volcano eruption is going to happen?
you guy are dumb
What term is used to indicate the region where no earthquake waves reach Earth's surface?
seismic zone
How are gas emissions used for eruptions?
An increase in gas emissions from a volcano can indicate that magma is on the move, which may lead to an eruption. If gas emissions stop or decrease it can be a sign that activity is decreasing or that pressure is building for an explosive eruption.
How are gas emissions used for predicting eruptions?
An increase in gas emissions from a volcano can indicate that magma is on the move, which may lead to an eruption. If gas emissions stop or decrease it can be a sign that activity is decreasing or that pressure is building for an explosive eruption.
What indicates an upcoming earthquake?
There are several things that may indicate an upcoming earthquake. Swarms, seismic activity, small tremors are the main indicators.
How do volcanologists know that when a volcano will erupt?
There may be a number of warning signs!An increase in seismic activity - the movement of magma into the magma chamber below the volcano which normally occurs before a volcanic eruption occurs causes an increase in small earthquakes which can be detected by seismometers. As the pressure builds, so does the number and size of these earthquakes.Shape changes - the earth's surface may begin to bulge due to the pressure of the magma. This occurred before the eruption of Mt. St Helens and can be monitored by scientists using a number of differing tools and sensors.A change or increase in the volume and composition of gasses and vapours emitted from the volcanic vent may also be a warning of increased volcanic activity or an impending eruption.A increase in temperature or a change of the chemical composition of groundwater may also indicate that an eruption is imminent.However these are all just guides that may help to warn of an eruption, but they are not a guarantee that it can be predicted.
What do lava flows made of pahoehoe and AA indicate about the type of volcanic eruption that occured?
They indicate that an eruption is effusive rather than explosive.
What do lava flows made of pahoehoe and AA indicate about the type of volcanic eruption the occured?
They indicate that an eruption is effusive rather than explosive.
What is a magmatic quake?
A magmatic quake is seismic activity caused by the movement of high pressure magma within the earth's crust. This tends to occur as the pressure within a magma chamber increases which leads to hydraulic fracturing of the surrounding rock mass. This fracturing causes the seismicity or magmatic quake. This sort of small scale seismic activity near a volcano may indicate that the pressure in the magma chamber that feeds the volcano is increasing and in turn may be a precursor to a volcanic eruption and is something that vulcanologists or geophysicists would be on the look out for!
When does a volcano eruption begin?
A volcanic eruption starts with the build up of pressure in the magma chamber. A bulge in the crater may indicate a impending eruption. Earthquakes may also precede an eruption.
What instrument produces patterns which indicate earthquake?
seismograph
What do lava flows the made of pahoehoe and AA Indicate about the type of volcanic eruption that occurred?
Lava flows of pahoehoe and aa indicate that the eruption was effusive ("quiet") rather than explosive, or only very mildly explosive.
What does the height of the jagged lines on a seismograph indicate?
It indicates that it is greater for a more severe earthquake or for an earthquake close to the seismograph.
Does the height Of the jagged lines on a seismograph indicate?
It indicates that it is greater for a more severe earthquake or for an earthquake close to the seismograph.
