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Alaska Volcano Observatory repairs seismic monitors

...to "detect those very small, small magnitude earthquakes that indicate fluid movement, either from an active hydrothermal system, or gas, or magma beneath the surface," Schaefer said.

http://juneauempire.com/state/2015-10-19/alaska-volcano-observatory-repairs-seis
State
Alaska Volcano Observatory repairs seismic monitors

...to "detect those very small, small magnitude earthquakes that indicate fluid movement, either from an active hydrothermal system, or gas, or magma beneath the surface," Schaefer said.

http://juneauempire.com/state/2015-10-16/alaska-volcano-observatory-repairs-seis
State
Study: Alaska quake altered eruption patterns of several Yellowstone geysers

...swarms" of local earthquakes also occurred near hydrothermal systems that saw such changes, the study said. Within...affected pressure on faults in proximity to the hydrothermal systems and set off small quakes - a possible explanation...

http://www.juneauempire.com/stories/053004/out_geyser.shtml
Outdoors
Mount Redoubt rumbles again

...fractures of the mountain that resonates and produces a distinct signal. "We think it's associated with the hydrothermal system there. It's being reinvigorated," Waythomas said. The tremors lasted about four hours and then settled down...

http://www.juneauempire.com/stories/031709/sta_410754392.shtml
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