Tag Archive for: faults

John Good
,

Utah Geological Survey Releases New Interactive Fault Map

geology.utah.gov

The Utah Geological Survey (UGS) has made the Utah Quaternary Fault and Fold Database available through a new interactive web application on the UGS website. This database contains information on faults and fault-related folds considered to be potential earthquake sources. The faults and folds in the database are considered to have been sources of large earthquakes (about magnitude 6.5 or greater) during the Quaternary geologic time period (past 2.6 million years); these geologic structures are the most likely sources of large earthquakes in the future. The Utah Quaternary Fault and Fold Database is the primary source of Utah data for the Quaternary Fault and Fold Database of the United States maintained by the U.S. Geological Survey (USGS).

The interactive map’s user interface was built using ESRI’s JavaScript API. Several search options allow the user to locate a fault of interest, or specify a location to see if any Quaternary faults are nearby. Pop-up windows provide a brief summary of important information associated with the faults, as well as a link to detailed reports available through the USGS national database. Users can select from a variety of basemaps including topographic, shaded relief, and satellite imagery. A glossary explains terms used in the pop-up windows as well as terms used in the detailed reports that may be unfamiliar to non-geologists.

In addition to the UGS interactive map, the Utah Quaternary Fault and Fold Database exists as a fully attributed GIS feature class in the State Geographic Information Database, and can be downloaded from the AGRC at http://gis.utah.gov/data/geoscience/quaternary-faults.

READ MORE

Utah Geological Survey
,

New technology uncovers hidden geological hazards

A couple of our geologists, Gregg Beukelman and Adam McKean, talk about new knowledge of fault lines west of Salt Lake International Airport thanks to advances in technology. Read more about it!

ksl.com

Geologist Adam McKean said experts knew there were some faults in the earth west of the Salt Lake International Airport.

READ MORE

Utah Geological Survey
,

Joint Evening Meeting “Geologic Remapping of the Warm Springs Fault”

Tuesday, October 7, 2014, 6:00 PM 
Utah Department of Natural Resources Auditorium,
1594 West North Temple (enter on south side)

 

 

 

 

 

 

 

 

 

Joint Evening Meeting with Association of Environmental Geologists (AEG), Utah Geological Association (UGA), Utah Geological Survey (UGS)
“Geologic Remapping of the Warm Springs Fault”
presented by Adam McKean, Mapping Geologist with the UGS

The Warm Springs fault of the Wasatch fault zone is a down-to-the-west normal fault, bounding the western portion of the Salt Lake salient. Recent geologic remapping of the Salt Lake City North 7.5-minute quadrangle has provided us an opportunity to revisit the Warm Springs fault and its place within Salt Lake and Davis Counties. A draft map of the quadrangle and evidences for the Warm Springs fault location will be presented at the meeting with opportunities for open discussion, questions, and feedback. We invite the geologic and geologic engineering community and interested parties to attend the event and take part in this public comment period.

Utah Geological Survey

Evaluating Surface Faulting Chronologies of Graben-Bounding Faults in Salt Lake Valley, Utah- New Paleoseismic Data from the Salt Lake City Segment of the Wasatch Fault Zone and the West Valley Fault Zone

By: Christopher B. DuRoss and Michael D. Hylland

The Salt Lake City segment (SLCS) of the Wasatch fault zone and the West Valley fault zone (WVFZ) are Holocene-active faults that have evidence of large-magnitude (M ~6-7) surface-faulting earthquakes. Paleoseismic research trenches at the Penrose Drive site on the SLCS and Baileys Lake site on the WVFZ provided data that shed light on the faulting behavior and interaction of these graben-forming fault systems. Numerical age control (22 radiocarbon samples 23 optically stimulated luminescence samples) and OxCal modeling of six or seven surface-faulting earthquakes on the SLCS and four earthquakes on the WVFZ helped refine the earthquake chronologies for these faults and allowed a comparison of the chronologies to evaluate fault interaction. The chronologies, as well as vertical displacements, support a model of coseismic fault movement.

GET IT HERE

ugsadmin

Utah Faults

Includes Utah earthquake fault information and county fault maps.

Read more
Utah Geological Survey

What Causes an Earthquake? Faults Explained

news.nationalgeographic.com

We all have our faults, and that includes planet Earth. Earthquakes rattle the globe every day, big and small, most recently making news this week with temblors in Puerto Rico and southern California.

READ MORE

Utah Geological Survey

IRON COUNTY POSTPONES VOTE ON GEOLOGIC ORDINANCE

sltrib.com

The Iron County Commission was poised to vote Monday on a geologic hazard ordinance that has been in the making for about six months when Commissioner Lois Bulloch threw a wrench in the works.

Bulloch recommended that an independent group review the proposed ordinance and make recommendations.

“I’ve heard a lot of consternation over this issue and had input in letters and calls and am just not comfortable moving forward,” said Bulloch. “Sorry to drop this bomb.”

Bulloch suggested that a committee with representatives of the county’s six municipalities, a city attorney and engineers look at the ordinance line by line and make specific changes.

“This way we won’t be accused of not listening,” said Bulloch.

Bill Lund, a geologist with the Utah Geological Survey, told commissioners a review by new eyes is a good idea and recommended including an official of a city or county in Utah that has already dealt with a similar ordinance.

READ MORE

Tag Archive for: faults

John Good
,

Utah Geological Survey Releases New Interactive Fault Map

geology.utah.gov

The Utah Geological Survey (UGS) has made the Utah Quaternary Fault and Fold Database available through a new interactive web application on the UGS website. This database contains information on faults and fault-related folds considered to be potential earthquake sources. The faults and folds in the database are considered to have been sources of large earthquakes (about magnitude 6.5 or greater) during the Quaternary geologic time period (past 2.6 million years); these geologic structures are the most likely sources of large earthquakes in the future. The Utah Quaternary Fault and Fold Database is the primary source of Utah data for the Quaternary Fault and Fold Database of the United States maintained by the U.S. Geological Survey (USGS).

The interactive map’s user interface was built using ESRI’s JavaScript API. Several search options allow the user to locate a fault of interest, or specify a location to see if any Quaternary faults are nearby. Pop-up windows provide a brief summary of important information associated with the faults, as well as a link to detailed reports available through the USGS national database. Users can select from a variety of basemaps including topographic, shaded relief, and satellite imagery. A glossary explains terms used in the pop-up windows as well as terms used in the detailed reports that may be unfamiliar to non-geologists.

In addition to the UGS interactive map, the Utah Quaternary Fault and Fold Database exists as a fully attributed GIS feature class in the State Geographic Information Database, and can be downloaded from the AGRC at http://gis.utah.gov/data/geoscience/quaternary-faults.

READ MORE

Utah Geological Survey
,

New technology uncovers hidden geological hazards

A couple of our geologists, Gregg Beukelman and Adam McKean, talk about new knowledge of fault lines west of Salt Lake International Airport thanks to advances in technology. Read more about it!

ksl.com

Geologist Adam McKean said experts knew there were some faults in the earth west of the Salt Lake International Airport.

READ MORE

Utah Geological Survey
,

Joint Evening Meeting “Geologic Remapping of the Warm Springs Fault”

Tuesday, October 7, 2014, 6:00 PM 
Utah Department of Natural Resources Auditorium,
1594 West North Temple (enter on south side)

 

 

 

 

 

 

 

 

 

Joint Evening Meeting with Association of Environmental Geologists (AEG), Utah Geological Association (UGA), Utah Geological Survey (UGS)
“Geologic Remapping of the Warm Springs Fault”
presented by Adam McKean, Mapping Geologist with the UGS

The Warm Springs fault of the Wasatch fault zone is a down-to-the-west normal fault, bounding the western portion of the Salt Lake salient. Recent geologic remapping of the Salt Lake City North 7.5-minute quadrangle has provided us an opportunity to revisit the Warm Springs fault and its place within Salt Lake and Davis Counties. A draft map of the quadrangle and evidences for the Warm Springs fault location will be presented at the meeting with opportunities for open discussion, questions, and feedback. We invite the geologic and geologic engineering community and interested parties to attend the event and take part in this public comment period.

Utah Geological Survey

Evaluating Surface Faulting Chronologies of Graben-Bounding Faults in Salt Lake Valley, Utah- New Paleoseismic Data from the Salt Lake City Segment of the Wasatch Fault Zone and the West Valley Fault Zone

By: Christopher B. DuRoss and Michael D. Hylland

The Salt Lake City segment (SLCS) of the Wasatch fault zone and the West Valley fault zone (WVFZ) are Holocene-active faults that have evidence of large-magnitude (M ~6-7) surface-faulting earthquakes. Paleoseismic research trenches at the Penrose Drive site on the SLCS and Baileys Lake site on the WVFZ provided data that shed light on the faulting behavior and interaction of these graben-forming fault systems. Numerical age control (22 radiocarbon samples 23 optically stimulated luminescence samples) and OxCal modeling of six or seven surface-faulting earthquakes on the SLCS and four earthquakes on the WVFZ helped refine the earthquake chronologies for these faults and allowed a comparison of the chronologies to evaluate fault interaction. The chronologies, as well as vertical displacements, support a model of coseismic fault movement.

GET IT HERE

ugsadmin

Utah Faults

Includes Utah earthquake fault information and county fault maps.

Read more
Utah Geological Survey

What Causes an Earthquake? Faults Explained

news.nationalgeographic.com

We all have our faults, and that includes planet Earth. Earthquakes rattle the globe every day, big and small, most recently making news this week with temblors in Puerto Rico and southern California.

READ MORE

Utah Geological Survey

IRON COUNTY POSTPONES VOTE ON GEOLOGIC ORDINANCE

sltrib.com

The Iron County Commission was poised to vote Monday on a geologic hazard ordinance that has been in the making for about six months when Commissioner Lois Bulloch threw a wrench in the works.

Bulloch recommended that an independent group review the proposed ordinance and make recommendations.

“I’ve heard a lot of consternation over this issue and had input in letters and calls and am just not comfortable moving forward,” said Bulloch. “Sorry to drop this bomb.”

Bulloch suggested that a committee with representatives of the county’s six municipalities, a city attorney and engineers look at the ordinance line by line and make specific changes.

“This way we won’t be accused of not listening,” said Bulloch.

Bill Lund, a geologist with the Utah Geological Survey, told commissioners a review by new eyes is a good idea and recommended including an official of a city or county in Utah that has already dealt with a similar ordinance.

READ MORE