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Weather news
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Readers' photos
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Data from the The Sun's weather station
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2011 stargazers' calendar
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Become a backyard astronomer in five simple steps
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Baltimore Weather Archive
Daily airport weather data for Baltimore from 1948 to today
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National Weather Service:
Sterling Forecast Office
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Capital Weather Gang:
Washington Post weather blog
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CoCoRaHS:
Community Collaborative Rain, Hail and Snow Network. Local observations by volunteers
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Weather Bug:
Webcams across the state
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National Data Buoy Center:
Weather and ocean data from bay and ocean buoys
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U.S. Drought Monitor:
Weekly maps of drought conditions in the U.S.
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USGS Earthquake Hazards Program:
Real-time data on earthquakes
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Water data:
From the USGS, Maryland
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National Hurricane Center
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Air Now:
Government site for air quality information
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NWS Climate Prediction Center:
Long-term and seasonal forecasts
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U.S. Climate at a Glance:
NOAA interactive site for past climate data, national, state and city
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Clear Sky Clock:
Clear sky alerts for stargazers
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NASA TV:
Watch NASA TV
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Hubblesite:
Home page for Hubble Space Telescope
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Heavens Above:
Everything for the backyard stargazer, tailored to your location
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NASA Eclipse Home Page:
Centuries of eclipse predictions
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Cruise Critic: Hurricane Zone:
Check to see how hurricanes may affect your cruise schedule
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Warming World:
NASA explains the science of climate change with articles, videos, “data visualizations,” and space-based imagery.
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What on Earth:
NASA blog on current research at the space agency.
Comments
Why?
FR: Think of it as a giant hand squeezing a sponge. Or maybe a breeze blowing across a grassy field. As seismic waves from the quakes pass through the Earth's crust, the rocks that contain the ground water are squeezed slightly and released. The water level in the well responds by rising and falling a few inches - or feet - as the waves pass through, then returning to their previous level. The same thing happens twice a day as the Earth turns, and the gravitational effects of the moon (and sun) create an "Earth tide" in the planet's crust. The slight crustal movement changes the water level in the well, which is quite visible in the regular, twice a day rise and fall of the water table, similar to ocean tides.
Posted by: Tracy Ford | March 4, 2010 4:54 PM