We had an unbelievable lightning storm last night. Investigators are also checking a lightning strike in addition to construction problems and other problems you have all mentioned.
From an article online from local channel 6. From the building next door a lady describes what she heard:
" sounded like loud bang, almost like thunder, but no lightning or storm followed after. That is how Fiorella Terenzi described the moment a building next door to where she lives partially collapsed in the middle of the night."
From CNN online:
"This rumbling was very different, very strange. And something was not right in this sound. It was too strong, too violent. It almost felt like a shock wave coming from the next building," she told CNN on Thursday.
She also told the New York Times that she had seen heavy equipment on the roof and that it was being used in checking the building structure. *This could mean that structural integrity of the building was already in question. *Nope to my idea about a question of structural integrity. The reason the equipment was there was because a required 40 year recertification of the building was in process.
I looked up this lady, Terenza, and she's not just any lady. She is a renowned astrophysicist that takes recordings of radio waves from space and turns them into music. Here's what Wikipedia has in her:
"Fiorella Terenzi is an Italian-born astrophysicist, author and recording artist who is best known for taking recordings of radio waves from far-away galaxies and turning them into music. She received her doctorate from the University of Milan but is currently based in the United States.
Described by Time magazine as "a cross between Carl Sagan and Madonna",[1] Dr. Terenzi has studied opera and composition at Conservatory G. Verdi, Corsi Popolari Serali and taught physics and astronomy at various U.S. colleges and universities; she is currently on the full-time faculty at Florida International University inMiami.[2][3][4] In research at the Computer Audio Research Laboratory, University of California, San Diego, she pioneered techniques to convert radio waves emanating from distant galaxies into sound,[5][6] with some of the results released by Island Records on her CD Music from the Galaxies.[7][8][9]The goal of her audiofication/sonification of celestial data is to investigate how sound could reflect chemical, dynamical and physical properties of celestial objects, which she calls "Acoustic Astronomy".[