The following info is copied directly from the FAA Aviation Safety Information Analysis and Sharing (ASIAS) Notice posted on 28 December.
26-DEC-15
Time: 00:45:00Z
Regis#: N670SW
Aircraft Make: BOEING
Aircraft Model: 737
Event Type: Incident
City: SACRAMENTO
State: California
Description: N670SW SOUTHWEST AIRLINES FLIGHT SWA4139 BOEING 733 AIRCRAFT ON DEPARTURE SUSTAINED A BIRDSTRIKE, RETURNED AND LANDED WITHOUT INCIDENT, INSPECTION REVEALED DAMAGE TO LEFT ELEVATOR, SACRAMENTO, CA
End of Notice
It sounds as though this incident could have had far more serious consequences. TG it didn't.
Despite my efforts to get rid of the noise and hiss, the first 70 seconds is still very noisy but it does get better after that.
I would be grateful if someone could explain how it comes about that whereas the ASIAS Notice states that the incident occurred at 00.45Z on 26/12 (and this is supported by other sources (eg FlightAware), after failing to find anything in the Live ATC archives for that date, I eventually found it in the archived file for 27/12.