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Earth, Planets and Space
Figure 6 | Earth, Planets and Space

Figure 6

From: Monthly GRACE detection of coseismic gravity change associated with 2011 Tohoku-Oki earthquake using northern gradient approach

Figure 6

Real data detection of coseismic gravity field changes. The gravity field changes associated with Tohoku-Oki earthquake are obtained using 1 month GRACE solution of April 2011. (a) Gravity changes of April 2011 with respect to the mean of 4 years from January 2007 to December 2010 (as the background field), with 300 km Gaussian smoothing and without destriping. (b) Gravity changes same as (a) but with P3M6 destriping and 300 km Gaussian smoothing. (c) Gravity changes same as (a) but with Duan09 destriping and 300 km Gaussian smoothing. (d) Northern gravity gradient changes of April 2011 with respect to the 4-year mean field, with 300 km Gaussian smoothing and without destriping. (e) Northern gravity gradient changes same as (d) but with P3M6 destriping and 300 km Gaussian smoothing. (f) Northern gravity gradient changes of February 2011 with respect to the 4-year mean field, with 300 km Gaussian smoothing and without destriping.

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