Top 10 volcanoes.usgs.gov Competitors

nps.gov

Park Ranger Peter Kasin explains how sea chanteys were used to coordinate work aboard vessels. Like to join a chantey sing in the park? Check here for info: https://go.nps.gov/1b9c2q

pnsn.org

PNSN.org has been rebuilt from the ground up with new features and exciting possibilities.

volcano.si.edu

Masaya volcano in Nicaragua has erupted frequently since the time of the Spanish Conquistadors, when an active lava lake prompted attempts to extract the volcano's molten 'gold' until it was found to be basalt rock upon cooling. It lies within the massive Pleistocene Las Sierras caldera and is itself a broad, 6 x 11 km basaltic caldera with steep-sided walls up to 300 m high. The caldera is filled on its NW end by more than a dozen vents that erupted along a circular, 4-km-diameter fracture system. The Nindirí and Masaya cones, the source of observed eruptions, were constructed at the southern end of the fracture system and contain multiple summit craters, including the currently active Santiago crater. A major basaltic Plinian tephra erupted from Masaya about 6,500 years ago. Recent lava flows cover much of the caldera floor and there is a lake at the far eastern end. A lava flow from the 1670 eruption overtopped the north caldera rim. Periods of long-term vigorous gas emission at roughly quarter-century intervals have caused health hazards and crop damage.

geo.mtu.edu

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bgs.ac.uk

This dataset provides information on modelled ranges of resistivity of bedrock and superficial deposits throughout the UK.

tnstateparks.com

Discover Tennessee’s natural, cultural and historic heritage. Our state parks offer diverse and varied natural landscapes, family-friendly recreational activities, affordable and varied lodging accommodations, volunteer opportunities and hundreds of interpretive programs and events.

gastateparks.org

Updates and alerts for weather at Georgia State Parks and Historic Sites.

azstateparks.com

Located in Safford, Arizona at the base of Mount Graham, Roper Lake State Park offers campsites, cabins, and outdoor adventure to all visitors!