Mount Hood's last major eruption occurred in the 1790's not long before Lewis and Clark's expedition to the Pacific Northwest. In the mid-1800's, local residents reported minor explosive activity, but since that time the volcano has been quiet.
Signal Colors and Their Meaning. The colors used in today's signals are green, yellow, red, lunar, and white (remember, we're talking about signals in North America). The color of a signal tells the engineer what he has to do, the location of that color, determines the speed at which he is allowed to do it.We will get to the speed thing in a minute.he colors used in today's signals are green, yellow, red, lunar, and white (remember, we're talking about signals in North America). The color of a signal tells the engineer what he has to do, the location of that color, determines the speed at which he is allowed to do it. We will get to the speed thing in a minute.
The color blue is the color of trust and responsibility. This color is one of trust, honesty and loyalty. It is sincere, reserved and quiet, and doesn't like to make a fuss or draw attention.It hates confrontation, and likes to do things in its own way.he paler the blue the more freedom we feel. In the meaning of colors, blue relates to one-to-one communication, especially communication using the voice-speaking the truth through verbal self-expression-it is the teacher, the public speaker.