https://www.facebook.com/photo.php?fbid=10152447882693447&set=pcb.10152447896178447&type=1&theater
Two images of Yellowstone sesimicity shared by AVCAN ("Canary Volcanic
Actually" in FaceBook)
That's how are organized, in the form of "bunches of grapes" earthquakes
incurred under the Yellowstone volcanic field from January 2013-today and
from January 2000-today
In the legend on the left, we can see a summary of the seismic activity
on
both periods by date.
Both the color of the represented events, and the scale of the left, are
time-dependent.
A graph corresponds to the period 2013 to today, and a second from 2000
until today.
The latter, with a much wider range, allows us to observe on the left,
in
the legend, the current activity, is a phase of increase in seismic
paroxysm.
But also there have been other similar phases before. Here the lines are
tighter, in this last graph, each stripe represents a period of more than
five days.