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By Lisa GarciaWhen I was six, my father announced that my family would be moving from the Bronx to Caracas, Venezuela. I was nervous and it didn’t help that my 2nd grade classmates told me our family would be living in grass huts. I thought that maybe Venezuela would be like Puerto Rico, where my…
Lava and Lava Flows The temperature of basalt lava at Kilauea reaches 1,160 degrees Celsius (2,120 degrees Fahrenheit). -- USGS/VHP Website, 1998 The tube system (lava tubes) of episode 53 (Pu'u O'o eruption, Hawaii) carried lava for 10 kilometers (6 miles) from the vent to the sea. So…
Wetlands are among the most productive habitats on earth providing shelter and nursery areas for commercially and recreationally important animals like fish and shellfish, as well as wintering grounds for migrating birds. Coastal marshes are particularly valuable for preventing loss of life and…
The water cycle, also known as the hydrologic cycle, describes the continuous movement of water on, above, and below the surface of the Earth. For a summary go to water cycle . Learn more at http://ga.water.usgs.gov/edu/watercycle.html .
Floods are a dangerous hazard throughout the world, and most people underestimate the power of flood waters. On average, in the United States, about 165 people are killed and about $2 billion of damage occurs each year. Several types of data can be collected to assist hydrologists predict when and…
You can purchase topographic maps several ways: Download or online from the USGS Store at http://store.usgs.gov Click on Maps in the left margin or click on the Map Locator near the center of the screen. Topographic maps in GeoPDF format are available for free download by using the Map…
Not specifically. Our charge is to understand characteristics of the earth, especially the earth's surface, that affect our Nation's land, water, and biological resources. That includes quite a bit of environmental monitoring. Other agencies, especially NOAA and NASA, are specifically funded…
An earthquake is caused by a sudden slip on a fault . The tectonic plates are always slowly moving, but they get stuck at their edges due to friction. When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust…
Go to the current water resources conditions site at http://water.usgs.gov/waterwatch for a map of real-time streamflow in the United States for the day of the year. For additional information on the subject, look at Fact Sheet 2007-3043 , 'From the River to You: USGS Real-Time Streamflow…
During the three giant caldera-forming eruptions that occurred between 2.1 million and 640,000 years ago, tiny particles of volcanic debris ( volcanic ash ) covered much of the western half of North America, likely a third of a meter deep several hundred kilometers from Yellowstone and several…
Yellowstone's volcanic and hydrothermal history suggests the potential for various kinds of eruptions in the future. The likelihood of a certain type of eruption occurring in the future can be judged by how often eruptions have occurred in the past. The most likely type of eruption would not…
See Earthquake Photos