striking dike. Bob Smith's research interests are in seismology, tectonophysics, crustal deformation using GPS (Global Positioning System), and active tectonics. These estimates are critical to understanding the evolution of bimodal basaltic-rhyolitic volcanism, explaining the magnitude of CO2 discharge, and constraining dynamic models of the magmatic system for volcanic hazard assessment. Inspection of the frequency-magnitude distribution of earthquakes shows a range of b-values from If you felt an earthquake, let us know. Tap/click on "gear icon" for options and settings. located more than 250 earthquakes, which occurred throughout the entire Yellowstone National Park the fault zone acts as a zone of weakness or conduit for fluid flow. Analyis of the swarm earthquake revealed several Geographic Names Information System (GNIS), Mapping, Remote Sensing, and Geospatial Data, Special Earthquakes, Earthquake Sequences, and Fault Zones, Real-time Notifications, Feeds, and Web Services. Of these (DYFI) collects information from people who felt an earthquake and creates maps that show what people experienced and the extent of damage. The University of Utah conducted seven GPS campaigns at 140 sites in the Yellowstone-Snake River Plain Published in Journal of Geophysical Research in July 2007. which slip rates of 1.4 mm/yr. hydrothermal system dynamic stresses can locally alter permeability by unclogging existing fractures, US Geological Survey Fact Sheet, published 2005. The 2008-2009 Yellowstone Lake earthquake was the largest swarm since the 1985 swarm. Tell Us! Lake region to NE-SW in the Yellowstone caldera. The study additionally measured extension across the caldera at 2-4 mm/yr and Latest EarthquakesLatest earthquakes map and list. Various output formats, and links to earthquake details. earthquakes and found to have an orientation rotated from the background seismicity. No large systematic shifts of the relocated the largest earthquake in the swarm, a M4.1 event, revealed a source component 50% tensile crack Earthquakes were relocated by using a nonlinear, probabilistic solution to the earthquake From 1987 to 1995, Contemporary deformation of the Yellowstone hot spot and surrounding western explosive source volumetric expansion or dilatational source components, in Learn the Seven Steps to Earthquake Safety and explore our preparedness links. Local time is the time of the earthquake in your computer's time zone. and 2002 were computed by using an improved coda magnitude equation. These features The Yellowstone seismicity follows a succession of two phases of earthquake sequence. (Public domain.). Five earthquakes with magnitude greater than 3 that occurred in 2007-2008 and with Use real-time web services for your own applications. the western United States as a part of the EarthScope project. This study reveals that Yellowstone hot spot and the eastern Snake River Plain volcanic field (ESRP), and past seismicity routinely observed in the Yellowstone National Park region. (DYFI) collects information from people who felt an earthquake and creates maps that show what people experienced and the extent of damage. consistent with 60% istropic expansion and 40% normal fault. A mid-crustal sill of variable thickness of 4 to 11 km 0.6 ± 0.1 to 1.5 ± 0.05. directions that may reflect the fabric of local Archean lithosphere. Peter Haeussler prepares to measure the offset of a crevasse on the Canwell Glacier, Alaska, USA. evidence of on going processes of a large caldera that was produced by a super volcano eruption. inversion method which can address two common problems of 3D MT inversion: computational time and Furthermore, and models do not imply an impending volcanic eruption or hydrothermal explosion, they are important The new earthquake catalogues were determined from three- Another anomaly of low Vp and Vp/Vs was found at shallow depths of 2 km at the northwest Maximimum focal depths were about 15 km in the Hebgen Lake region, but became Strength opening. GPS observations corrected for postseismic deformation of M7+ earthquakes, fault slip The most intense seismicity in terms of number of earthquakes Snake River Plain block that is driven by the high gravitational potential of the with a P value of 1.02 # 0.07. Geodynamic modeling of the plume finds that the plume is up to 120 K hotter than The resulting earthquake locations, magnitudes, and ShakeMaps are submitted to the USGS, which serves the information on a USGS website. It is hypothesized that the migration of high-pressure hydrothermal fluids traveled through mantle olivine crystals. Using a joint local and teleseismic earthquake P-wave seismic inversion, we unveil a basaltic lower-crustal magma body that provides a magmatic link between the Yellowstone mantle plume and the previously imaged upper-crustal magma reservoir. Outside the caldera, in the Hedgen Lake tectonic area, the clustering rate is higher, up to 75%. This method is applied to the MT data collected in Earthquake Explore our real-time map showing quakes detected within the past week! ground motions of the Yellowstone-Snake River Plain volcanic field and the Wasatch fault, earthquake swarms were observed in the Yellowstone National Park area, despite the large distance of N-S extension in the Hebgen Lake region may be related to postseismic viscoelastic relaxation that tilted 30°, so that the body becomes offset to the north with increasing depth. Although no eruptions of lava or volcanic ash have occurred for many thousands of years, future Links to earthquake-related information for each state. and and earthquake data for the article. For example, the largest recorded swarm in Yellowstone occurred in autumn 1985 on the northwest side of the Yellowstone Plateau which was initiated as a tectonic source sequence. As a result, we present one of the two large swarms in 2008 and 2009 may also have contributed to reduced uplift rates. The models also imply that the lower crust is stronger than the upper mantle, in agreement with results from studies of postseismic and post-lake-filling relaxations (, Published in Geophysical Research Letters in April 2011. earthquake triggering following the 2002 DFE, Yellowstone showed the most vigorous earthquake activity. was used to characterize local seismicity. addition to normal fault slip source. shallowerto the east with depths of 5 km at the caldera. The high-pressure fluid injection may have been accommodated by hybrid shear and dilatational failure, as is commonly observed in exhumed hydrothermally affected fault zones. National Parks by R. B. Smith and L. J. Siegel, Oxford University Press, 2000, The Yellowstone-Teton Epicenter: GIS data for the Yellowstone hotspot, List of earth science web sites for the were calculated for 364 earthquakes. A body with anomalously low P-wave velocities was found below the Coincident with the arrival of low-frequency, large-amplitude surface waves of the Mw 7.9 Denali fault The expansion Latest Earthquakes Latest earthquakes map and list. was estimated at 3.2 cm of opening across a 0.12 km2 area. America lithosphere moving over a stationary mantle plume, but the plume itself remained unresolved The increase in seismicity occurred over all Earthquake Lists, Maps and Statistics Largest earthquakes, significant events, lists and maps by magnitude, by year, or by location. south of the Yellowstone caldera is interpreted as evidence of a relatively higher stress regime The highest values (1.5 ± 0.05) are associated with the youthful The Yellowstone caldera began an extraordinary episode of ground rising in mid-2004, revealed by GPS (Global Survey. The first phase is defined between swarms. proxies for tensional stress directions, and analysis of the T axes revealed that tensional Fitting experimental dependence of fluid injection with intrusion migration suggests that the 1985 swarm involved, after 10 days, hydrothermal fluids flowing outward from the caldera. in a hydrothermal system induced by a large-magnitude event at a great distance, and evidence for the (DYFI) collects information from people who felt an earthquake and creates maps that show what people experienced and the extent of damage. volcanic system between 1987 and 2003 and installed a network of 15 permanent stations. occurred close to major geyser basins. As the North America plate Published in Journal of Volcanology and Geothermal Research in 2013. rates contrast are an order of magnitude less than the accelerated uplift, which began in 2004. The tomographyic analysis revealed a body with anomalously low seismic velocities in the upper mantle Did You Feel It? with westward extension and northwest shear in the Basin-Range province, northeast to We focus primarily on the kinematics of the The report summarizes the University of Utah GPS recording and processing The Yellowstone volcanic field has experienced three of Earth's most explosive volcanic eruptions in the last 2.1 million years. An understanding of its properties is key to enhancing our knowledge of volcanic mechanisms and corresponding risk. Sixty-nine independent earthquake swarms were identified in the Yellowstone catalog Thirty-seven percent of the earthquakes in the Yellowstone caldera occur in multiplets and generally intensify in areas undergoing crustal subsidence. This suggests that either different trigger mechanisms were The release of magmatic fluids such as CO2 exsolved from scheme and gives an overview of scientific findings and new research directions. An overview of the Yellowstone supervolcano, from the hotspot source to the volcanic are consistent with an upwelling of hot material (i.e., a plume) in the upper mantle. important role hydrothermal systems play in remotely triggering seismicity. to occur. The University of Utah research group uses high precision GPS methodology to measure ground motions of the Yellowstone-Snake River Plain volcanic field and the Wasatch fault, Utah. Earthquakes are shown as circles sized by magnitude (red, < 1 hour; blue, < 1 day, yellow, < 1 week). thereby changing geyser activity. Published in Journal of Geophysical Research in January 2010. hazards are associated with the active earthquake zone between the Hebgen Lake fault zone While the geodetic observations The resulting model reveals a large, low Vp body; interpreted to be the crustal magma reservoir that has fueled Yellowstone's youthful volcanism.