This photo is an example of excellent design, and of poor design.
The idea behind the sign is fantastic. People passing by are asked to put their phone into the bracket on top of the sign, take a photo, and share it on Twitter with the #morganfire02 tag.
Unfortunately, the idea is so good that the hashtag’s been inundated with photos of the sign itself, making it tricky for casual viewers to check out the photos of the fire site itself. Hopefully this will turn out to be a short-lived spike and the researchers can keep collecting their great work. You can check out the photos at http://nerdsfornature.org/monitor-change/diablo.html. I particularly liked the way camera 3 showed the grass grow back over time.