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.
Volcano-Adventures.com: Tom Pfeiffer's new tour company since 2015: a professional team of volcanologists and photographers offers unique travel opportunities: volcano expeditions, photo tours, and relaxed walking & study tours.
Discovery Tours : Our signature tours for small groups - we take you to discovery volcanoes and volcanic areas from close with an expert in their field. These tours have a broad mix of activities and interests from photography, walking, study travel, nature & culture.
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