Ionospheric Disturbances Recorded by DEMETER Satellite over Active Volcanoes: From August 2004 to December 2010

<table>Top: number of the 5 types of anomalies per year between mid-2004 and December 2010. Middle: daily mean Kp index versus time. Bottom: bar chart of the number of eruptions having given rise to ionospheric anomalies (red) or not (black).</table>

International Journal of Geophysics

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Figure 4

Figure 4: Ionospheric Disturbances Recorded by DEMETER Satellite over Active Volcanoes: From August 2004 to December 2010 