I am looking for a sample/dummy live feed which I can use with Geoevent extension for testing purposes.
Hi Richardson,
You can use the USGS Earthquake feeds on the right of the following web page:
I was able to successfully create a JSON input and update a feature service using one of these feeds, i.e.:
http://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/4.5_month.geojson