[time-nuts] Atomic clocks could be used to monitor volcanoes and predict eruptions
Brooke Clarke
brooke at pacific.net
Wed Jul 8 16:26:12 EDT 2015
Hi:
Changes in gravity are detected by Cs clock rate changes using fiber optic time transfer to other stable clocks.
http://www.gizmag.com/atomic-clocks-volcano-monitoring/38251/?
Monitoring volcanoes with ground-based atomic clocks
http://www.mediadesk.uzh.ch/articles/2015/vulkane-mit-atomuhren-ueberwachen_en.html
Atomic clocks as a tool to monitor vertical surface motion
"Atomic clock technology is advancing rapidly, now reaching stabilities of Δf/f∼10−18, which corresponds to resolving
1cm in equivalent geoid height over an integration timescale of about 7 hours. At this level of performance,
ground-based atomic clock networks emerge as a tool for monitoring a variety of geophysical processes by directly
measuring changes in the gravitational potential."
http://arxiv.org/abs/1506.02457
Full article:
http://arxiv.org/pdf/1506.02457v2
By combining the clock and a gravity meter the Love numbers for a specific location can be found. That needs to be done
also at the reference clock location.
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Have Fun,
Brooke Clarke
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