Posted by: Saving Water SA (Cape Town, South Africa) – partnered with Water Rhapsody conservation systems – 03 August 2010
A new study has found that a mixing of two different types of magma is the key to the historic eruptions of Mount Hood, Oregon’s tallest mountain, and that eruptions often happen in a relatively short time – weeks or months – after this mixing occurs.
This behavior is different from that of most other Cascade Range volcanoes, including Mount Hood’s nearby, more explosive neighbor, Mt. St. Helens.
The research results are reported this week in the journal Nature Geoscience by geologists from Oregon State University (OSU) and the University of California at Davis, in work supported by the National Science Foundation (NSF).
“These results clarify details of the processes that trigger Mount Hood eruptions,” said Sonia Esperanca, program director in NSF’s Division of Earth Sciences, which funded the research. “Similar triggering processes may occur in several of Earth’s most active volcanoes.”
“The data will help give us a better road map to what a future eruption on Mount Hood will look like, and what will take place before it occurs,” said Adam Kent, a geoscientist at OSU. “It should also help us understand the nature of future eruptions and what risks they will entail.” Continue reading