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HomeNewsGeologic HazardsTrenching on Weber Segment of Wasatch Fault

Trenching on Weber Segment of Wasatch Fault

June 13, 2007 rockman Geologic Hazards Comments Off on Trenching on Weber Segment of Wasatch Fault

The Salt Lake Tribune published an article recently on some trenching activity by the Utah Geologic Survey and the USGS to better date past movements on this active fault.

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  • earthquake
  • Ogden
  • Wasatch Fault
  • Weber Segment
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Press Releases

New Study Shows Odds High for Big California Quakes

April 15, 2008 rockman Press Releases Comments Off on 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]

[…]

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April 1, 2014 Chilean Earthquake Location
Geologic Hazards

8.2 Magnitude Earthquake off Coast of Chile, Triggers Tsunami Warnings

April 2, 2014 rockman Geologic Hazards Comments Off on 8.2 Magnitude Earthquake off Coast of Chile, Triggers Tsunami Warnings

A magnitude 8.2 earthquake struck off the coast of Chile late Tuesday. The damage estimates will probably begin rolling in today, but early indications are that it could have been much worse. Some 5 people […]

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Geologic Hazards

Anniversary of Loma Prieta Earthquake – USGS Warns of Hayward Fault

November 1, 2007 rockman Geologic Hazards Comments Off on Anniversary of Loma Prieta Earthquake – USGS Warns of Hayward Fault

October 17 was the 18th anniversary of the 6.9 magnitude Loma Prieta earthquake that struck the Bay area.  But a recent story by the Bay Area’s local ABC affiliate, ABC7, chose to focus on another earthquake, a 1868 earthquake of about the same magnitude that occurred on the Hayward Fault. According to the USGS, the Hayward Fault has a return period of about 140-years and  "It’s the most heavily urbanized fault in the U.S. and it’s just waiting to go off…" Next year will be the 140-th anniversary of the last earthquake on the Hayward Fault. At some point it has the potential to be a very bad earthquake there. More after the break. (Photo by sanbeiji)

[…]

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