The GeoBlogosphere

A List of Many Geoblogs (Geobulletin)
A List of Some Inactive Geoblogs
Adventures in the World of Geology
Adventures of a Laura
Active Tectonics Blog
Agile*
Arizona Geology e-Magazine
Arkansas Geological Survey Blog
Bloc de Camp (Catalàn)
Carbonacea
Colorado Earth Science
Dana Hunter's Unconformity
DC Geology Events
Diary of a Geology Student
Don't Panic Geocast
Dr. Anne Jefferson's Watershed Hydrology Lab
Earth Learning Idea
Earth Science Erratics - currently inactive but available for guest posts!
Earth-of-fire (French)
Earthly Musings - Wayne Ranney
Environment and Geology
Explorer Multimedia Inc. Blog
Exploring the Earth
GeoCastAway (Spanish)
GeoLog (the EGU blog)
Geological Society of London blog
Geology News (Geology.com)
GeologyPics - Marli Miller (not a blog)
Geology for Global Development
Geology in Motion
Geology in the West Country
Geología Venezolana (Spanish)
Geomagnetism.org
Georneys
Geosciblog
GeoSciTweeps
Geotripper
Geotripper Images (not a blog)
Girls into Geoscience
Gîte et découvertes de la vallée du Sant (French)
Gravel Beach
Highly Allochthonous
History of Geology
Iceland geology blog
In the Company of Plants and Rocks
In the Company of Volcanoes
Infogeología (Spanish)
JOIDES Resolution Blogs
Julian's Blog
Locos por la Geologia (Spanish)
Looking for Detachment
Lounge of the Lab Lemming
Magma Cum Laude
Maitri's VatulBlog
Matkalla Maapallon Vaippaan (Finish - Traveling the Globe of the Earth)
Melting Planet
Metageologist
Mini Me Geology Blog
Mountain Beltway
MTA-ELTE Vulkanológiai Kutatócsoport (MTA-ELTE Volcanology Research Group) - Hungarian
My Life in the Geosciences - Yours, in LadyGeoscience
Natural Hazards and Disasters
NBMG | Blog of the Nevada Bureau of Mines and Geology
Northern Rivers Geology
Oakland Geology
Ontario Geofish
Paleoseismicity.org
Peligros Geológicos en el Perú (Spanish)
Rapid Uplift
Reading the Washington Landscape
Retos Terrícolas (Spanish & English)
Riparian Rap
Rock-Head Sciences
Rocks and Water
Rocky Planet
Ron Schott's Gigapan profile page
Rosetta Stones
Sandatlas (more of a reference than a blog anymore)
Sciency Thoughts
Sedimentary Lifestyle
Seismo Blog
Speaking of Geoscience (GSA Guest Blog)
Stories in Stone Blog
The Geochristian
The Geology P.A.G.E.
The Landslide Blog
The Plainspoken Scientist (AGU)
The Volcanology Chronicles
Un geólogo en apuros (Spanish) - Nahum Chazarra
Utah Geological Survey Blog
Volcano Blog by Tom Pering
WATCHING FOR ROCKS-Travels of a Sharp-eyed Geologist
Wooster Geologists
Written In Stone...seen through my lens