There was a spooky seance early Saturday morning -- the 45th anniversary of the Sharon Tate murders -- that would probably please Charles Manson to no end.
The seance was held 200 feet from the site where Manson Family members slaughtered 7 people, including Tate.
Just after midnight ... as the seance was in full swing, a fire alarm went off for no apparent reason. There was no evidence of fire or smoke, although 2 candles on the table lit up the scene.
The Tate house is no longer there, but there have been supernatural tales spun for decades.