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Fig. 1. | Earth, Planets and Space

Fig. 1.

From: Ionospheric disturbances detected by GPS total electron content observation after the 2011 off the Pacific coast of Tohoku Earthquake

Fig. 1.

Vertical TEC observed by the “0042” station from 05:30 UT to 07:00 UT (14:30–16:00 JST) on March 11, 2011, with the signal from (a) the PRN26 satellite and (b) the PRN18 satellite. (c) The location of “0042” station (dot) and ionospheric pierce points (IPP) of line-of-sight (LOS) for the PRN26 and the RPN18 satellite-receiver pairs (curves). The digits represent the corresponding UT hours. The star mark represents the location of the epicenter.

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