HILO When you think of GPS, what typically comes to mind? Your phone, the navigation in your car or maybe your watch? In addition to the US constellation, there are 3 other Global Navigation Satellite ...

Mexico’s Popocatépetl volcano has long drawn attention for its size, constant activity, and glowing plumes of smoke and ash, ...

Geodesy is the science of accurately measuring and understanding the Earth’s geometric shape, gravity field, and orientation in space — and how these change through time. Many geodesists today map ...

The shape of volcanoes and their craters provide critical information on their formation and eruptive history. Techniques applied to photographs -- photogrammetry -- show promise and utility in ...

When individuals hear volcanoes, they tend to envision blazing eruptions blasting into the air. However, volcanoes can also collapse sideways, with their sides, or flanks, collapsing. Such a collapse ...

Think about a mountain that keeps getting taller but never explodes. This might sound impossible, yet it happens more often than most people realize. Volcanoes don't always follow the same playbook of ...

Forty-three years ago today, Mount St. Helens erupted, triggering a magnitude 5 earthquake and spewing ash, mud and debris across southwest Washington. The explosion killed 57 people and changed the ...

An active underwater volcano off Canada's coast has revealed a vibrant deep-sea habitat, teeming with hundreds of thousands of Pacific white skate eggs. This geothermally active seamount provides a ...