Reporting
Fun that you felt it.
The USGS takes some time, usually 30 minutes to report on most eq's. There is auto reporting, but these are then reviewed by humans before we get a good number. The lowest magnitude reported on their site is 2.5 in the United States. Elsewhere in the world it may take a longer time before reported for small temblors. Due to lack of equipment, some areas have very poor reporting.