The Volcano Adventure Guide: Excellent information and background for anyone wishing to visit active volcanoes safely and enjoyably. The book presents guidelines to visiting 42 different volcanoes around the world.
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Reading Hospital West Reading PA / MMI IV (Light shaking): I was sitting at computer, chair shook. Felt like someone had walked by and shook it to startle me.
Wyomissing, PA / MMI IV (Light shaking): Awoke to shaking with items in shower falling onto floor.
Wyomissing, PA / MMI II (Very weak shaking): I was watching youtube late at night, and I felt a jolt of the couch bed shaking, and a loud rumble sound revribrating from the floor, as if something fell and shattered. Like an explosion of some sort.
Introduction to Plate Tectonics: The Earth's upper, rigid layer is broken into several plates which are in constant motion to one another. Most earthquakes and volcanoes occur as result of these plate boundaries.
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