I'm from Guatemala. This is actually the second (and smaller) sinkhole. The first one was located not too far away, http://conred.gob.gt/galeria/fotos/fotografias-de-incidentes-1969-2009/640x480Hundimiento%20Barrio%20San%20Antonio%20Zona%206%20102%202007.JPG/image_preview and happened last year. However, earth just doesn't open, first huge rumbling sounds begin, then, after a couple of weeks, earth opens. Also, we have already pinpointed possible new sinkhole locations, one which is barely 200mts from the last one. Now is just a matter of time to see if the government does something, which is unlikely.

You can bury any medium and a way to play it aswell, lets say, a cd and a disk man, as for music goes, or maybe magnetic tape and bet that some company will still have ways to read it, since its useful for backups. Depending on your budget there is a bunch of stuff you could bury to play the media you bury, or go for a top tech of nowodays wich should be partially old 10 years in the future,,,