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.
Tumble Buttes is a volcanic field in northern California, consisting of several cinder cones that had been last active about 15,000 years ago. A well-known feature is Devils Rock Garden, a blocky lava flow which extends south of the volcano.
Latest quakes in Greece: Greece has a lot of earthquake activity, but most of them occur around the margin of the Aegean microplate. The Cycladic islands are located in its center and therefore seismically comparably quiet.
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