In an earlier post I showed how to import USGS earthquake data for the previous seven days into Entrance. Do that today, and you will see the Mendocino and Haiti Quakes:
This script adds a datetime column to the dataset::
ALTER TABLE earthquakes
ADD COLUMN dt DATETIME;
UPDATE earthquakes
SET dt =
STR_TO_DATE(datetime, "%W, %M %e, %Y %H:%i:%S UTC");
and a Datetime-Y chart shows the severity of the aftershocks:that followed the main Haiti quake:
Click on the charts to see the scripts for making them.