[the_arun]

The timestamp is generated per server. The system time could differ across nodes in the cluster (even with NTP) by nano seconds. So, isn't the accuracy of the first tweet is approximation if there are multiple tweets containing same word "earthquake" at the same time at ns level? But I get the point.

[talaketu]

Tweet object from the Twitter API has a "creation_time" that has 1s resolution, whereas the snowflake creation time has 1ms resolution. No doubt these could disagree, but if that happened then maybe both authors could get a prize?