Fig. 3.From: Acoustic resonance and plasma depletion detected by GPS total electron content observation after the 2011 off the Pacific coast of Tohoku EarthquakeThe high-pass filtered TEC data whose cut-off period is 10 minutes (a) along 37°N latitude from 136°E to 148°E, and (b) along 142°E longitude from 32°N to 44°N from 05:30 to 10:00 UT.Back to article page