OK, I'll give the locations for mine, none of them very exciting:
9-11: In computer/ IT room at work; suddenly heard a TV in nearby office; no one watched TV there, so was instantly alerted to something unusual happening. Ran to see. At first thought it was a terrible accident,
7-7: At home, listening to radio. Then frantically trying to phone my mum, who lived in London and sometimes travelled on public transport. Couldn't get her at first; was frantic with worry; finally did get her- she was fine and had not used public transport that day,
Brexit referendum result: On home computer in office room, just before going to work,
Trump getting elected: Ditto. And when I got into work, my office-mate greeted me with 'Oh, I'm so relieved that Trump beat Hillary!' Not the best thing to say to me at this point.
Of all things to stick in one's memory forever: Sir Keith Joseph becoming Education Secretary in 1981! I knew he'd be a disaster and he was. I was at my parents' house, in living room watching news on TV.
1997 election; especially my mum ringing at about 2 a.m. to tell me that Wimbledon, where she lived, had become a Labour gain! At home, in my living room watching TV, and then receiving the phone call in my bedroom.
Apollo 11 moon landing, when I was a kid. At home, watching TV with parents and visit
Recently, the Queen's death and funeral, and the King's coronation. All of these on home computer in office-room.