Magnitude 3.7 near Rangely, CO

University of Utah Seismograph Stations

Released: April 22, 2017 02:00 PM MDT

The University of Utah Seismograph Stations reports that a minor
earthquake of magnitude 3.70 occurred at 11:48 AM on April 22, 2017
(MDT). The epicenter of the shock was located in northwestern Colorado,
2.5 miles northwest of the town of Rangely, CO. The earthquake was
reported felt in the town of Rangely. A total of 11 earthquakes of
magnitude 3.0 or greater have occurred within 16 miles of the epicenter
of this event since 1962. The largest of these events was a magnitude
4.6 on March 20, 1995, which occurred in the same area.

Anyone who felt the earthquake is encouraged to fill out a survey form
either on the Seismograph Stations website: www.quake.utah.edu or the
US Geological Survey website: earthquake.usgs.gov.

Earthquake Summary:

Date (UTC): April 22, 2017 Time (UTC): 17:48

Date (local): April 22, 2017 Time (local): 11:48 AM MDT

Latitude: 40 6.60′ N

Longitude: 108 50.48′ W

Preferred magnitude: 3.7 Ml

Magnitude 3.8 near Bluff, UT

PRESS RELEASE

University of Utah Seismograph Stations

Released: April 21, 2017 11:30 PM MDT

The University of Utah Seismograph Stations reports that a minor
earthquake of magnitude 3.8 occurred at 10:01 PM on April 21, 2017
(MDT). The epicenter of the shock was located 13 mi WSW of
Montezuma Creek, UT. One earthquake of magnitude 3.0 or greater has
occurred within 16 mi of the epicenter of this event since 1962. This
was a magnitude 3.7 on June 06, 2008, 9 mi WNW of
Montezuma Creek, UT.

Today’s earthquake was reported felt in the town of Blanding, UT.

Anyone who felt the earthquake is encouraged to fill out a survey form
either on the Seismograph Stations website: www.quake.utah.edu or the
US Geological Survey website: earthquake.usgs.gov.

Earthquake Summary:

Date (UTC): April 22, 2017 Time (UTC): 04:01

Date (local): April 21, 2017 Time (local): 10:01 PM MDT

Latitude: 37 14.73′ N

Longitude: 109 34.10′ W

Preferred magnitude: 3.8 Ml

Magnitude 3.3 near Cedar City, UT

PRESS RELEASE

University of Utah Seismograph Stations

Released: March 05, 2017 1:30 PM MST

The University of Utah Seismograph Stations reports that a minor
earthquake of magnitude 3.3 occurred at 12:14 PM on March 05, 2017
(MST).  The epicenter of the shock was located in the Cedar Valley,
6 miles WSW of Enoch, UT and 7.1 miles NNW of Cedar City, Utah.

The earthquake was reported felt in the vicinity of Cedar City.
A total of 34 earthquakes of magnitude 3.0 or greater have
occurred within 16 miles of the epicenter of this event since 1962.

Anyone who felt the earthquake is encouraged to fill out a survey form
either on the Seismograph Stations website: www.quake.utah.edu or the
US Geological Survey website: earthquake.usgs.gov.

Earthquake Summary:

Date (UTC):   March 05, 2017         Time (UTC):   19:14

Date (local): March 05, 2017         Time (local): 12:14 PM MST

Latitude:     37 45.82′ N

Longitude:    113 7.99′ W

Preferred magnitude: 3.30 Ml

UUSS and University of Utah Seismology at AGU 2016

AGU Fall Meeting 2016 (American Geophysical Union) presentations from UUSS and other University of Utah Seismologists.

Amir Allam

Jamie Farrell

Paul Geimer

Keith Koper

Guanning Pang

Kevin Ward

Sin-Mei Wu

Hao Zhang

 

Origins of a National Seismic System in the United States

Origins of a National Seismic System in the United States

John R. Filson, Walter J. Arabasz

ABSTRACT

This historical review traces the origins of the current national seismic system in the United States, a cooperative effort that unifies national, regional, and local-scale seismic monitoring within the structure of the Advanced National Seismic System (ANSS). The review covers (1) the history and technological evolution of U.S. seismic networks leading up to the 1990s, (2) factors that made the 1960s and 1970s a watershed period for national attention to seismology, earthquake hazards, and seismic monitoring, (3) genesis of the vision of a national seismic system during 1980–1983, (4) obstacles and breakthroughs during 1984–1989, (5) consensus building and convergence during 1990–1992, and finally (6) the twostep realization of a national system during 1993–2000. Particular importance is placed on developments during the period between 1980 and 1993 that culminated in the adoption of a charter for the Council of the National Seismic System (CNSS)—the foundation for the later ANSS. Central to this story is how many individuals worked together toward a common goal of a more rational and sustainable approach to national earthquake monitoring in the United States. The review ends with the emergence of ANSS during 1999 and 2000 and its statutory authorization by Congress in November 2000.

Magnitude 3.2 near Bluffdale, Utah

PRESS RELEASE

University of Utah Seismograph Stations

Released: November 25, 2016 09:45 AM MST
The University of Utah Seismograph Stations reports that a minor
earthquake of magnitude 3.2 occurred at 08:45 AM on November 25, 2016
(MST). The epicenter of the shock was located 6 miles below the
Traverse Mountains at the southern end of the Salt Lake Valley, 4.1 mi
SW of Bluffdale, UT. This earthquake was widely felt in the southern
Salt Lake Valley and northern Utah Valley. The largest earthquake
previously recorded in this area was a magnitude 4.1 event on March 16,
1992.

Anyone who felt the earthquake is encouraged to fill out a survey form
either on the Seismograph Stations website: www.quake.utah.edu or the
US Geological Survey website: earthquake.usgs.gov.
Earthquake Summary:
Date (UTC): November 25, 2016 Time (UTC): 15:45

Date (local): November 25, 2016 Time (local): 08:45 AM MST

Latitude: 40 27.17′ N

Longitude: 111 59.83′ W

Preferred magnitude: 3.20 Ml

Salt Lake City’s Fix the Bricks Program

Fix the Bricks is Salt lake City’s plan to help homeowners afford seismic improvments to homes.

Unreinforced masonry buildings and homes (URMs) create the greatest risk for the Salt Lake Valley in the expected Utah earthquake. Fix the Bricks, facilitates seismic improvements to URMs to save lives. Preparedness starts at home, Act Now! Determine if your home is at risk and register to receive more information about how to get started including financial incentives available for making seismic improvement.

RIGHT NOW YOU CAN APPLY FOR A GRANT TO RECEIVE UP TO 75% OF YOUR SEISMIC RETROFIT COST.

Sign up at www.bereadyslc.com/go/doc/6354/2122438/

KSL.com story

Dr. Bob Smith’s interview on NPR’s Hear & Now

Here & Now’s Jeremy Hobson takes a tour of Yellowstone National Park’s geyser basin with a park ranger and a scientist who’s been studying the geology of the park for nearly 60 years.

Yellowstone is home to more geysers than any place on Earth, and researchers are still learning about how they work.

Guests

Dr. Bob Smith, coordinating scientist at the Yellowstone Volcano Observatory and an emeritus professor of geophysics at the University of Utah.

Rebecca Roland, park ranger at Yellowstone National Park.

 

Mag 3.5 near Granger, Wyoming

PRESS RELEASE
University of Utah Seismograph Stations
Released: July 02, 2016 05:54 PM MDT
The University of Utah Seismograph Stations reports that a minor
earthquake of magnitude 3.5 occurred at 04:14 PM on July 02, 2016
(MDT).  The epicenter of the shock was located in southwest Wyoming,
5 miles NNE of the town of Granger, WY and 26.3 miles W of Green River,
WY.  Twenty-two earthquakes of magnitude 3.0 or greater have occurred
within 25 km of the epicenter of this event since 1962.
Anyone who felt the earthquake is encouraged to fill out a survey form
either on the Seismograph Stations website: www.quake.utah.edu or the
US Geological Survey website: earthquake.usgs.gov.
Date (UTC):   July 02, 2016         Time (UTC):   22:14
Date (local): July 02, 2016         Time (local): 04:14 PM MDT
Latitude:     41 39.83′ N
Longitude:    109 56.40′ W
Preferred magnitude: 3.5 Ml

A uniform moment magnitude earthquake catalog and background seismicity rates for the Wasatch Front and surrounding Utah region: Appendix E in Working Group on Utah Earthquake Probabilities (WGUEP)

Arabasz, W.J., Pechmann, J.C., and Burlacu, R., 2016, A uniform moment magnitude earthquake catalog and background seismicity rates for the Wasatch Front and surrounding Utah region: Appendix E in Working Group on Utah Earthquake Probabilities (WGUEP), 2016, Earthquake probabilities for the Wasatch Front region in Utah, Idaho, and Wyoming: Utah Geological Survey Miscellaneous Publication 16-3, variously paginated.

This appendix to the report by the Working Group on Utah Earthquake Probabilities (2016) describes full details of the construction and analysis of a refined earthquake catalog and the calculation of seismicity rates for the Wasatch Front and surrounding Utah region. The earthquake catalog covers the period from 1850 through September 2012. The catalog region extends from lat. 36.75° to 42.50° N and from 108.75° to 114.25° W. A uniform moment magnitude, M (and quantified magnitude uncertainty), is determined for each earthquake in the catalog.


Electronic Supplements (.xlsx)

E-1.  Best-Estimate Moment Magnitude (BEM) Earthquake Catalog

E-2.  Moment Magnitude Data

E-3.  Merged Subcatalog A, Jan. 1850-June 1962

E-4.  Merged Subcatalog B, July 1962-Dec. 1986

E-5.  Merged Subcatalog C, Jan. 1987-Sept. 2012

E-6.  Worksheets for Mobs, M~, Mpred (I0)

E-7.  Worksheets for Xnon, Xmix (Subcatalogs A, B)

E-8.  Worksheets for Xvar, Xi (Subcatalog B)

E-9.  Worksheets for Xvar, Xi (Subcatalog C)

E-10.  N* Counts for the WGUEP and Utah Regions