Riley's blog was down as of Monday morning. A proxy blog maintained by Australian journalist Eric Shackle, however, is still accessible.
"Olive Riley passed away peacefully on Saturday, July 12," wrote Shackle.
"She will be mourned by thousands of Internet friends and hundreds of descendants and other relatives."
Shackle's own posting on the temporary blog logged more than 135 comments from Riley's readers, who ranged from Sydney to California.
Riley had taken ill in her nursing home on June 10th. Her last blog entry, entitled 'Settling In,' was posted on June 26th.
"Penny, who's in the next bed to mine, had a visit one day this week from her daughter, who's a professional singer," wrote Riley.
"Guess what happened! She and I sang a happy song, as I do every day, and before long we were joined by several nurses, who sang along too. It was quite a concert!"