Mount Rainier is one of many volcanoes in the Cascade Mountain Range. It is one of the tallest mountains in North America, and it did not gain this topographic stature by frequently blowing its top as Mount St. Helens did in 1980 or Mount Mazama did around 5677 B.C. creating Crater Lake; its tall stature would seem to indicate most of its eruptions have been "mountain-building" -- creating new rock from lava flows.
However, Mount St. Helens and Mount Mazama are also both part of the same Cascade volcanic mountain range as Mount Rainier, so a mountain-destroying eruption similar to the St. Helens or even Mazama blasts (the latter, obvious by means of its more complete self-destruction, much stronger) is definitely possible.
Even a mountain-building eruption, however, is likely to be rife with explosive phases, especially toward the beginning as it would 'clear the pipes.' Mount Rainier erupted as many as 6 times in the 1800s, but -- aside from tremors -- was quiet throughout the 20th century and, thus far, the 21st century. European explorers and settlers documented very noticeable volcanic plumes from Rainier during the 1800s.
Relative to Mount St. Helens, Rainier is an older and taller mountain (and has more glacial volume and mass than St. Helens did even prior to its 1980 eruption), and many more people live within range of Rainier and the rivers that flow from its glaciers (susceptible to lahars and pyroclastic flows) than St. Helens.
It is generally not believed that an eruption from Mount Rainier -- as with any Cascade volcano -- would not be as smooth and quiet as some of Hawaii's volcanoes, but there do seem to be more mountain-building eruptions (adding lava) than mountain-destroying eruptions (destroying the cone and leaving a crater).
If the composition of the magma is high in silica, the eruption will be explosive. The Eruption of Mt. St. Helens was an explosive eruption. If the composition of the magma is low in silica, it will produce a quiet eruption. The eruption(s) of Mt. Kilauea are quiet eruptions.
It is an explosive eruption technically a strombolian eruption
1820. 1820 is the last recoded erruption, not the first. Rock layers of the volcano are 500,000 years old, therefore one may conclude that the first eruption would have been approximately 500,000 years ago. Mt Rainier is predicted to erupt again, has hot springs and local authorties have emegency plans prepared in the event of a new eruption.
The warning signs before the big eruption of Mt. Rainier typically last for days to weeks. These signs can include increased seismic activity, surface deformation, and gas emissions, giving authorities time to evacuate people from the danger zone.
Mt. Rainier has had numerous eruptions in the past, with the most recent major eruption occurring approximately 1,000 years ago. It is considered an active volcano and continues to be monitored for signs of potential eruptive activity.
If the composition of the magma is high in silica, the eruption will be explosive. The Eruption of Mt. St. Helens was an explosive eruption. If the composition of the magma is low in silica, it will produce a quiet eruption. The eruption(s) of Mt. Kilauea are quiet eruptions.
Yes. Mount Rainier is a stratovolcano with the potential to produce explosive eruptions.
The 1980 eruption was very explosive. Ash was blown 80,000 feet into the air and the mountain is a quarter mile shorter than it was before the eruption.
If the composition of the magma is high in silica, the eruption will be explosive. The Eruption of Mt. St. Helens was an explosive eruption. If the composition of the magma is low in silica, it will produce a quiet eruption. The eruption(s) of Mt. Kilauea are quiet eruptions.
explosive
Mount Rainier last erupted in 1894.Clarification:The last recorded volcanic eruption of Mt Rainer was between 1820 and 1854, but there have been many witnesses to further volcanic activity and rumblings in 1858, 1870, 1879, 1882 and 1894.
It had an eruption like explosive diarrhea.
1790
The eruption of mount Vesuvius was an explosive one.
Mt. Rainier has erupted 11 confirmed times in the last 10,000 years. Most of these eruptions (8) are concentrated between 6500 and 4000 years ago. Since the eruption 2,200 years ago there has only been one recorded explosive eruption as identified and dated through airfall tephra and tree ring dating. This eruption was believed to be between 1820 and 1854 AD. For further information on the more distant geologic history and understanding of future risks from Mt. Rainier see related links to the Cascades Volcano Observatory.
explosive
2 inches per hour