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Fast radio bursts (FRBs) are radio transients of extragalactic origin lastingfor about a few to several milli-seconds. We have analyzed both non-CHIME andCHIME FRB data. To circumvent the absence of measured fluence and flux densityof FRBs belonging to the CHIME catalog, we have devised a novel approach thatutilizes the ratio of the lower limits of the flux density $S_{\nu_O}$ to thefluence $F_{\nu_O}$ of individual FRB events to construct several parameters toinvestigate the presence of underlying trends in the FRB population drawn fromboth CHIME and non-CHIME data sets. One of these parameters involves truebrightness temperature as well as energy density, despite not knowing theactual size of the FRB emission region. Our first robust conclusion is that thenon-CHIME FRBs fall under two broad categories - those with luminosity densityless than about $4\times 10^{33} $ erg/s/Hz at the frequency 300 MHz and thosehaving larger luminosity density values than this. Assuming that FRBs arecaused by magnetar glitches, we have discussed in this paper a simple physicalmodel, incorporating an abrupt change in the light cylinder radius of anoblique rotator, to address the existence of these two categories.

Observed Trends in FRB Population and Bi-modality in their Peak Luminosity Density Distribution