Esri announced earlier this summer that they were making over 175,000 historical maps from the USGS available online. The maps are available to anyone to view online using their web map viewer. Or ArcGIS online subscribers can have access to high-resolution geo-referenced raster images for use in their ArcGIS projects and web mapping projects. Very cool! [Source: View the Historical Topo Map Explorer at ArcGIS.com via Or read more about the tool and find additional information at the Esri Blogs. Image: Esri]
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NOAA, USGS Warning System to Help Protect Southern Californians from Debris Flows and Flash Floods
Released: 11/7/2007 1:18:29 PM
Contact Information: U.S. Department of the Interior, U.S. Geological Survey Office of Communication 119 National Center Reston, VA 20192 |
Clarice Nassif Ransom &n=Clarice+Nassif+Ransom"> Phone: 703-648-4299 Matt Ocana (NOAA) |
Winter Rains on Burn Areas Could Spawn New Danger
A debris flow and flash flood warning system developed jointly by NOAA’s National Weather Service and the U.S. Geological Survey will help protect Southern Californians from potentially devastating debris flows-commonly known as mud slides- and flash floods in and around burn areas created by the recent wildfires.
New Study Shows Odds High for Big California Quakes
Released: 4/14/2008 12:02:15 PM
California has more than a 99% chance of having a magnitude 6.7 or larger earthquake within the next 30 years, according scientists using a new model to determine the probability of big quakes.
The likelihood of a major quake of magnitude 7.5 or greater in the next 30 years is 46%-and such a quake is most likely to occur in the southern half of the state.
[Editor] At Left: Figure 1. The colors on this California map represent the UCERF probabilities of having a nearby earthquake rupture (within 3 or 4 miles) of magnitude 6.7 or larger in the next 30 years. As shown in the table, the chance of having such an event somewhere in California exceeds 99%. The 30-year probability of an even more powerful quake of magnitude 7.5 or larger is about 46%. [/Editor]