Left panel: T90 distribution of the SGR 1935+2154 bursts detected during the burst storm. The black solid line is the best-fit lognormal function to the distribution with a mean of 840 ms. Middle panel: T100 distribution along with the best-fit lognormal function (black solid line) with a mean of 1.27 s. Right panel: waiting-time distribution and the best-fit lognormal function, shown as a black solid line. The average waiting time between bursts is 2.1 s. See text for more details.