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Earth, Planets and Space
Fig. 2. | Earth, Planets and Space

Fig. 2.

From: Ionospheric multiple stratifications and irregularities induced by the 2011 off the Pacific coast of Tohoku Earthquake

Fig. 2.

The same as Fig. 1 but approximately 14 min after the earthquake. Note that the ionogram times delayed with lowering the latitude and the observation at Okinawa was 2 min after the ΔTEC map. The arrows indicate a cusp signature for the O-mode trace. The red star in the TEC map is the epicenter reported by the U.S. Geological Survey, while the cross shows the center of the concentric circle of TEC disturbance (ionospheric epicenter).

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