Skip to main content
Fig. 2 | Earth, Planets and Space

Fig. 2

From: Atmospheric modes excited by the 2021 August eruption of the Fukutoku-Okanoba volcano, Izu–Bonin Arc, observed as harmonic TEC oscillations by QZSS

Fig. 2

Slant TEC time series at 0603 with J07 satellite 4:30–8:00 UT on 5 days, August 11–15, 2021. They are high-pass filtered by taking residuals from best-fit degree 9 polynomials. A typical Plinian eruption signature (TEC oscillation with period ~ 4 min) is seen after 5 UT only on August 13, the starting day the Plinian eruption. The unit TECU (TEC unit) indicates 1016 electrons/m2

Back to article page