Not very time sensitive.

There was a 7.2 magnitude quake (pretty big) in Mexico about 90 minutes ago.
There is nothing that shows you within this app.
I was alerted by a news app.
Even hunting for a known quake is pointless with this app. Dont expect to see anything right after it happens. This example makes this app a total waste of money.

DeanOfMyrtleBeach about Tremor Tracker