Abstract:
Ionospheric ions (O+ and H+) and temperature (Ti) as precursory parameters to seismic activity have been analysed from year 1995
till 1998, using SROSS-C2 (average altitude range of 500 km) satellite measurements for moderate magnitude earthquakes. The details
of seismic events during this period are downloaded from United State Geological Survey (USGS) and National Earthquake Information
Centre (NEIC) website. 13 seismic events of moderate magnitude (M = 4–5.5) from 1995 to 1998, using SROSS-C2 satellite measurements
have been analysed. During seismic affected period, considerable decrease in the density of heavier ion - O+ and increase in the
ion temperature (Ti) is observed during all the selected events. Lighter ion - H+ doesn’t show any significant change. Electric field and
electromagnetic emissions generated due to seismogenic activity could be the plausible initializing agents responsible for change in ion
concentration and temperature values during these events.
