Answer:
A magnificent volcano erupted at St.-Helens.
This incident happened on 18th of May, 1980.
This volcano is situated in Skamania County. It is present in the Washington.
Washington is a state of USA.
It is the most dangerous and destructive Volcano Eruption in the history of USA.
There was a series of earth-quakes after this eruption. These earth-quakes continued for about two months after this eruption.
According to the scale of this Volcanic eruption, the following Phrase best describe this eruption.
⇒ High-viscosity Magma
⇒ The Lava broken into fragments
Step-by-step explanation: