Could have been caused by thermal shock. Google it.

I don't think you will find any "experts" who will swear to a reason for glass breaking for any reason (other than an obvious projectile or the like).

"I don't think you will find any "experts" who will swear to a reason for glass breaking for any reason (other than an obvious projectile or the like)."

After the fact, no.

But implosion of double glass units has been a problem for a while.

The seals could not contain the single gas fill well enough, it escaped, and air (mostly nitrogen and oxygen) could not enter to fill the space.

The elastic limit of the glass was exceeded and it shatters.

It often sounds like a large thump, followed by the merry sound of falling glass crumbs.

DebV2727, I am no expert - just a regular homeowner - but can tell you that I had the same experience. Two months after I moved in to a brand new house, the sliding glass door shattered, just as you described. And, as brickeyee mentioned - I did hear a loud thump followed by the twinkling sound of the glass shattering in to a thousand tiny pieces. I really hope that you don't have to pay to get the glass repaired. Good luck!