March 1964 - biggest earthquake in North America. Damage to Fourth Avenue, in Anchorage, Alaska, caused by the Good Friday Earthquake. Collapse of Fourth Avenue near C Street due to a landslide caused by the earthquake. Image via Wikimedia Commons.
1964 Alaska earthquake The earthquake lasted approximately minutes and is the most powerful recorded earthquake in U. It is also the second largest earthquake ever recorded, next to the earthquake in Chile in
How Volcanos Work The majority of Earth’s volcanoes are found on the seafloor, along the mid-ocean ridge — a chain of volcanic peaks that rings the planet and the spot where many of Earth’s plates spread apart. (image: USGS) (via:OurAmazingPlanet)