Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa23a1905p&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SA23A-1905
Physics
[2423] Ionosphere / Ionization Processes, [2435] Ionosphere / Ionospheric Disturbances, [2437] Ionosphere / Ionospheric Dynamics, [2487] Ionosphere / Wave Propagation
Scientific paper
An interesting case of plasma blob event was observed on August 27-28, 1987 over Cachoeira Paulista (22.7°S, 45.0°W; 13.25°S MLAT, declination 20°W) showing localized plasma density enhanced by a factor of, approximately, 2 above the background level. On this night, geomagnetic activity was moderately disturbed with Dst> -70 nT. An all-sky imager operating in the OI 630 nm emission was used to map the spatial extension and temporal location of plasma blob that showed, typically, east-west and north-south extensions of 320-350 km and 360-380km, respectively. The F-region parameters were obtained from a Digisonde 256, which provide a good idea of the ionospheric behavior during the event. In this paper, important features from this localized electron density enhancement in the low latitude region is presented and discussed.
Amorim D.
Pimenta Alexandre A.
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