Advisory
NASA plane seen flying at low altitude over Altadena today.
NASA plane seen flying at low altitude over Altadena today. 
Low flying plane over Altadena and Southern California today. It just passed along the foothills a few minutes ago. We have been told the plane belongs to NASA.
Plane is a DC-8 with a call sign of NASA817
For live flight information:
https://flightaware.com/live/flight/NASA817
Address/Location
LASD - Altadena Station, Los Angeles County Sheriff
780 E Altadena Dr
Altadena, CA 91001
Contact
Emergency: 9-1-1
Non-emergencies: 626-798-1131