Ionospheric Disturbances Recorded by DEMETER Satellite over Active Volcanoes: From August 2004 to December 2010
Figure 7
(a) Percentage of type 1 anomalies by 15-day periods between 60 days before the onset of eruptive activity and 15 days after. (b) Percentage of type 2 anomalies by 15-day periods between 60 days before the onset of eruptive activity and 15 days after.
