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What are some examples of volcanic activity leading up to the eruption?
Some examples of volcanic activity leading up to an eruption include increased seismic activity, such as small earthquakes or tremors, ground deformation or bulging caused by magma movement, increased gas emissions, such as sulfur dioxide, and the appearance of new fissures or vents on the volcano's surface through which magma can escape. These signs can help scientists monitor and predict volcanic eruptions.
Can volcanic eruption and seismic tremors produce large mudflows and debris flows?
Yes. Earthquakes and volcanic eruptions can cause debris flows. Volcanic eruptions can mudflows called lahars.
Has St. Louis experienced any volcanism or seismic activity?
St. Louis has likely felt earthquakes from the New Madrid seismic zone, but there is no volcanic activity for hundreds of miles.
What is the belt of volcanic and seismic activity that borders most of the Pacific Rim?
pacific ring of fire
Did Mount St. Helens erupt with little warning?
The eruption of Mt. St. Helens on May 18, 1980 did give significant warning before the actual large eruption took place. There was a period of a month and a half of unrest before the flank collapse and lateral blast events took place. The unrest began being documented March 15, 1980, however it was not immediately recognized as possibly being a precursor to a volcanic event. The seismic events were first recognized as precursor activity on March 20th, 1980 with a magnitude 4.2 under the north flank of the volcano (Which also turned out to be the eruptive and failure point of the volcano on May 18). For further and detailed readings on the precursor events before the triggered eruption please see related links for the Cascade Volcanoes Observatory.
Before a volcanic eruption seismic activity seems to?
increase in both frequency and intensity
What are the precautions for volcanic eruption?
A few things that can predict an occurance of a volcanic eruption can be seismic activity such as tremors or small earthquakes. The release of certain gases such as Sulfur Dioxide and other gases.
What are the volcanic events?
seismic activity
How is volcanic activity monitored?
by seismic waves
How do you use the word seismic in a sentence?
The volcanic eruption triggered the nearby seismicevent.
Is a volcanic wave longitudinal?
There are no waves that are specifically called "volcanic waves"; however, a volcanic eruption can of course cause seismic waves. These can be longitudinal or transverse.
Can a volcano affect you if its on the other side of the world?
Yes, depending upon the magnitude (severity) of the eruption. Large clouds of ash can be blown across the globe, reducing visibility and restricting air travel. Seismic activity from a volcanic eruption can also trigger tsunami waves that can have devastating impacts far away from the original site of the volcanic eruption.
What is a seismograph for?
They are used to measure earthquakes and volcanic eruptions by recording seismic activity.
What are some examples of volcanic activity leading up to the eruption?
Some examples of volcanic activity leading up to an eruption include increased seismic activity, such as small earthquakes or tremors, ground deformation or bulging caused by magma movement, increased gas emissions, such as sulfur dioxide, and the appearance of new fissures or vents on the volcano's surface through which magma can escape. These signs can help scientists monitor and predict volcanic eruptions.
Can volcanic eruption and seismic tremors produce large mudflows and debris flows?
Yes. Earthquakes and volcanic eruptions can cause debris flows. Volcanic eruptions can mudflows called lahars.
Has St. Louis experienced any volcanism or seismic activity?
St. Louis has likely felt earthquakes from the New Madrid seismic zone, but there is no volcanic activity for hundreds of miles.
What caused the eruption of Mt St Helen?
volcano eruptions are triggered by seismic activity, meaning earthquakes and such. Mt St Helens is along the ring of fire, which is full of seismic activity.
