|This is a generic desciption that applies to pre-eruptive play in most geysers. One or more of the following changes may occur: water level rises and overflows; water level pulses up and down; water bubbles, domes up or splashes; boiling steam bubbles appear. The intensity of these actions may increase over time. However, there may be no prior warning at all. All observations must be made from a legal trail or boardwalk in order to avoid injury and environmental damage. Consider what the impact of your actions would be if repeated by millions of others. Please report any activity to the nearest Visitor Center.