Why did Mount Rainier erupt in 1894?

Mount Rainier did not have a significant eruption in 1894. Instead, it experienced a notable volcanic activity in the form of steam eruptions and minor ash emissions during that time. The geological activity was primarily due to the heat from the volcano's magma interacting with groundwater. This type of activity is characteristic of stratovolcanoes like Mount Rainier, which can exhibit intermittent eruptions and steam events rather than large explosive eruptions.