I don't link to many other blogs from here. I've kind of restricted myself to blogs that focus largely on earthquakes and that other endothermal process of volcanoes, and that have entries on a more or less weekly basis.
But of course, there are many others. Here is a list from last December of 100 best earth science blogs. I'd only been here for a couple of months at the time. Maybe I will crack into the next version of this list.