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15 Novemeber 2006 -- Micro-g LaCoste gPhone Gravity Meters Capture Earthquake in Japan


Five newly-built g Phone Gravity Meters at the Micro-g LaCoste gravity lab serendipitously recorded the earthquake centered north of Japan on 15 November 2006. The location of the earthquake is shown below.

japan 2006 earthquake

To hear an audio (.wav format) version of the earthquake, please click here.

The gPhone meters are each in different stages of completion, but all instruments had strikingly similar responses. The figure below shows the responses of the five instruments over 4 hours after the quake (1 second sampling). Complete results and analysis are available here, and a detailed look at the remarkable correlation between all 5 instruments is available here.

plots of gPhone output data