Physics
Scientific paper
Jul 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3314303h&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 14, CiteID L14303
Physics
5
Atmospheric Composition And Structure: Volcanic Effects (8409), Geodesy And Gravity: Atmosphere Monitoring With Geodetic Techniques (6952), Ionosphere: Ionospheric Disturbances, Volcanology: Explosive Volcanism, Volcanology: Instruments And Techniques
Scientific paper
The Japanese dense array of Global Positioning System recorded ionospheric disturbances as changes in Total Electron Content ~12 minutes after the September 1 2004 eruption of the Asama Volcano, Central Japan. The disturbance had a period of one and a quarter minutes and propagated as fast as ~1.1 km/s, suggesting its origin as the acoustic wave generated by the explosion. By comparing the disturbance amplitudes with those by a surface mine blast with a known energy, the overall Asama explosion energy is inferred to be about 2 × 1014 J.
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