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Earth, Planets and Space
Fig. 3 | Earth, Planets and Space

Fig. 3

From: Drift of an ocean bottom electromagnetometer from the Bonin to Ryukyu Islands: estimation of the path and travel time by numerical tracking experiments

Fig. 3

Particle back-tracking simulations without (left, 200 particles) and with (right, 2000 particles) horizontal eddy diffusion (horizontal diffusion coefficient = 10 m2/s). a Daily particle positions from 18 February 2021 to 10 June 2019. Nishinoshima and Iriomote Islands are indicated by the blue and red stars, respectively. Red traces represent the tracks of particles that ‘arrived’ (i.e., originated from) within the Nishinoshima target area. b Original positions of particles calculated to have originated from within the target area. The center of the star represents Nishinoshima Island. The color scale represents the back-transport duration from Iriomote Island. c Distributions of back-transport times in each simulation

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