Geology 

Near real time data and cruise data along with archives for air quality, coral bleaching, algal blooms, earthquake and volcano activity, oil and chemical spills, space weather and more. Provides widgets for updates.

Update every 6 hours, this site provides a synopsis of oceanographic and meteorological observations at locations affected by a tropical cyclone or Nor'easter.

VECOS site provides three types of water quality data; interpolated images of surface water quality generated by the Dataflow (Underway) program, graphs of shallow water quality data from fixed stations that has gone through quality assurance protocols, and real time data from the last 7 days at available stations. Users can download quality assured data from both Dataflow cruises and fixed continuous monitoring stations

Maintained by the International Seabed Authority, an autonomous international organization established in 1982 under the United Nations.

Links to news, featured articles, and global maps on a variety of earth and environmental topics. RSS and archive of daily images. Search and browse archives.

Flashy, non-official, tracker for Atlantic hurricanes and tropical storms.

Near real-time and videos