I have put in a System.out.println as the first statement of the execute method. It prints in my terminal running CodeRunner a couple of times quickly after each other every minute.
2015-09-11 10:36:09:187: RefreshEarthquakesTimer.execute called
2015-09-11 10:36:09:202: processing 100 earthquakes
2015-09-11 10:36:09:283: RefreshEarthquakesTimer.execute called
2015-09-11 10:36:09:300: processing 100 earthquakes
2015-09-11 10:36:09:378: RefreshEarthquakesTimer.execute called
2015-09-11 10:36:09:393: processing 100 earthquakes
2015-09-11 10:36:09:473: RefreshEarthquakesTimer.execute called
2015-09-11 10:36:09:488: processing 100 earthquakes
2015-09-11 10:36:10:201: RefreshEarthquakesTimer.execute called
2015-09-11 10:36:10:216: processing 100 earthquakes
2015-09-11 10:36:10:296: RefreshEarthquakesTimer.execute called
2015-09-11 10:36:10:311: processing 100 earthquakes
2015-09-11 10:36:23:006: found 0 new earthquake records
2015-09-11 10:36:23:148: found 0 new earthquake records
2015-09-11 10:36:23:291: found 0 new earthquake records
2015-09-11 10:36:23:291: found 0 new earthquake records
2015-09-11 10:36:24:075: found 0 new earthquake records
2015-09-11 10:36:24:203: found 0 new earthquake records