Abstract. Lightning generated signals recorded at a low-latitude station, Suva (18.2° S, 178.3° E) Fiji, in the South Pacific region, during September 2003–July 2004, are used to study propagation features and reflection heights of tweek atmospherics waveguide formed by Earth's surface lower ionosphere. Tweeks observed only local night maximum harmonic (n) is six. The occurrence tweeks with higher n progressively decreases as increases. dispersed part attenuation factor has been calculated...

Abstract Large scale traveling ionospheric disturbances (LSTIDs) can be detected using the critical frequency of F 2 layer ( f o ) ionosphere. The HF interferometry (HF‐int) technique is applied to ionosonde data from low and mid latitude stations over Australia. For first time, we present a comparison TIDs during geomagnetic storms 17 March 23 June 2015. TID response for these two comparable superstorms significantly different owing differing storm evolution patterns. associated are more...

The morphological features of initial ionospheric scintillations on 3.925 GHz beacon signal from geostationary satellite Intelsat (701) at Suva (Lat., 18.08° S, Long., 178.3° E, Geom. Lat., 22.1° S), Fiji, a low latitude station in the South Pacific region have been studied during period December 2003 to June 2004. Scintillations were, general, sparse, which activity was more pronounced daytime. Scintillation occurrence less showing peak value about 2.5% 09 h LT and secondary 2% around 16...

Abstract Using the Time Of Group Arrival (TOGA) of sferics about 3700 cloud‐to‐ground (CG) flashes were recorded in one year (2003) largest island, Viti Levu Fiji. A maximum CG flash density 0.49 flashes/km 2 per was two locations island. The seasonal variation showed enhanced lightning incidences during November–April and diurnal peak activity from 14:00–16:00 h local time. Five‐year data Lightning Imaging Sensor (LIS) aboard NASA Tropical Rainfall Measuring Mission (TRMM) satellite are...

Tweek and whistler atmospherics (sferics) recorded at a low latitude station, Suva (18.2oS, 178.3oE, geomag. lat. 22.2oS, L = 1.17) Fiji, in the South Pacific region, during September 2003–July 2004 March–December 2006 were analyzed to probe nighttime D-region ionosphere plasmasphere. From first harmonic analysis of selected 1063 tweeks, path integrated ionospheric reflection height was estimated mostly between 75–97 km with median standard deviation 83.6 4.1 km, respectively. The mean...

Using the Time Of Group Arrival (TOGA) of sferics two year (Jan2003-Dec2004) annual average about 3,200 and 1,200 cloud-to-ground (CG) flashes were recorded in larger islands, Viti Levu Vanua Levu, Fiji. A CG flash density showed maxima 0.80 0.35 flashes/km2 per islands. The diurnal variation peak activity between 14:00 hrs- 16:00 hrs LT seasonal enhanced lightning incidences during November-April. Data from Lightning Imaging Sensor (LIS) aboard NASA Tropical Rainfall Measuring Mission...

The South Pacific Journal of Natural Science (SPJNS) is published online by CSIRO PUBLISHING on behalf the Faculty and Technology, University Pacific, Fiji. normal focus journal to disseminate scientific research work carried out in Pacific.

Large-scale travelling ionospheric disturbances (LSTIDs) are detected using the critical frequency of $F_{2}$ layer $( f_{o}F_{2})$ ionosphere. The HF interferometry (HF-Int) technique is applied to network ionosondes in Australian region detect and estimate propagation parameters. Here we present traveling (TIDs) characteristics (period, velocity, intensity) associated with selected geomagnetic storms. TID response during storms varies significantly owing differing storm evolution patterns....

The South Pacific Journal of Natural Science (SPJNS) is published online by CSIRO PUBLISHING on behalf the Faculty and Technology, University Pacific, Fiji. normal focus journal to disseminate scientific research work carried out in Pacific.