Alana W, Alyssa B, Brendin C, Dayne H, & Yasmine C
Science Behind Earthquakes
The Cascadia Subduction Zone is one of the cause for earthquakes in the Northwest. The denser oceanic plates subduct beneath the less dense continental plate offshore of our region. North American moves in a general southwest direction, overriding the oceanic plate. During an earthquake the tectonic plates rub against each other. The largest kind of earthquake is a mainshock. Mainshocks can last up to months depending on how big.
A U.S. Geological Survey study shows that large, so-called megaquakes of more than 7.5 magnitude have occurred on average every 246 years during the past 10,000 years. About 15-20 quakes a year are felt in the Northwest. The aftermath can be devastating with millions of dollars in damage and casualties. It is important to be prepared so you and your family can stay out of harm's way.
In order for a person to survive from the aftermath of an earthquake, each person should drink at least 1 gallons of water per day. On average, a woman should eat 1,200 calories a day, while men should eat at least 1,800 calories a day. All the essential materials and sources are listed on our display board and our website.