never
At least 840,000 years ago.
Mount Rainier was not named after a physical feature, but named after a British Admiral by the name of Peter Rainier by a friend of his, Captain George Vancouver whom is believed to have been the first European to see the mountain in 1792.
The first recorded people to reach the summit of Mount Rainier were P.B. Van Trump and Philemon Beecher in 1870. They are credited with making the first successful ascent of the mountain.
Mount Rainier was named by Captain George Vancouver in 1792 after Rear Admiral Peter Rainier, a British naval officer. Vancouver first saw the mountain from Puget Sound and named it to honor Rainier's support for his explorations in the Pacific Northwest.
The first recorded sighting of Mount Rainier was by Peter Rainier in 1792 during George Vancouver's expedition. However, the mountain was actually named after British Admiral Peter Rainier, rather than being discovered by him.
Mount Etna
In the event of a Mount Rainier eruption, follow authorities' evacuation orders immediately. Stay informed through emergency notifications and have a pre-established emergency plan in place. Be prepared with emergency supplies (food, water, first aid kit) and have a designated meeting point for your family in case of separation.
Mount Rainier is a composite (stratovolcano) volcano. This type of volcano is still active and usually have periodic and explosive eruptions. These types of volcanoes are tall and cone shaped. Composite volcanoes are made from many layers of hardened lava.
The Buick Rainier was first introduced by General Motors in 2004. The Buick Rainier was made as a replacement to the Oldsmobile Bravada and was the first truck sold under the Buick brand.
Edmund Hillary was the first to reach the summit of Mount Everest in 1953
No. it became active in 1991 when it erupted for the first time for 500-600 years.
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.