Data Event Response to the March 31, 2020 M 6.5 Earthquake 72 km W of Challis, Idaho
Written by Kathleen Hodgkinson, Dave Mencin, & Beth Bartel
Originally posted 31 March 2020
Last updated 13 April 2020
Event Summary
A magnitude 6.5 earthquake occurred at 23:52:31 UTC (17:52:31 local) on March 31, 2020, 72 km W of Challis, Idaho (referred by the Idaho Geological Survey as the Stanley earthquake). For more information, see the USGS Earthquake Hazards Program event page.
The event occured within the Network of the Americas (NOTA) footprint. NOTA is a core component of the NSF Geodetic Facility for the Advancement of Geoscience (GAGE), operated by UNAVCO.
GAGE Response
NOTA GPS/GNSS Real Time Data Solutions
11 GPS/GNSS stations within 300 km of the epicenter were operating in real-time during the event, i.e., they were continuously streaming high rate (1-sps / 1 Hz) data to UNAVCO (Figure 1). Typical latencies for real-time stations, the time lapse between and observation being recorded on the receiver and it arriving in Boulder are less than 1 second.
UNAVCO will be downloading high-rate 1- and 5-sps (1 and 5 Hz) data from select NOTA GPS/GNSS stations. When downloaded, these data will be available in RINEX format from the UNAVCO high-rate data ftp site.
GAGE GPS/GNSS Displacement Estimates
Coseismic offsets were not estimated for this event.
A fully processed 1-sps borehole strainmeter (BSM) dataset for this event will be produced. This dataset can be downloaded from the UNAVCO borehole strainmeter event response page when it is available. See Figures 2 and 3 for examples of signals recorded by the BSM network.
Note: Figures and findings are preliminary and subject to revision.
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Figure 1. Map showing NOTA GPS/GNSS stations from which UNAVCO downloaded high-rate (1-sps and 5-sps) GPS/GNSS data following the March 31, 2020 M 6.5 earthquake 72 km W of Challis, Idaho. These data will be available...Read more » -
Figure 2. Horizontal displacements calculated from real-time position solutions from the NOTA GNSS network during the March 31, 2020 Stanley, Idaho earthquake. Dashed vertical line shows event origin time. Blue dots...Read more » -
Figure 3. Individual dynamic strain from the March 31, 2020 Stanley, Idaho earthquake for borehole strainmeter B208, 376 km from the earthquake epicenter. Magnitude estimate is based on the strain-magnitude relationship...Read more » -
Figure 4. Individual dynamic strain from the March 31, 2020 Stanley, Idaho earthquake for borehole strainmeter B944, 365 km from the earthquake epicenter. Magnitude estimate is based on the strain-magnitude relationship...Read more » -
Figure 5. Long-term tectonic velocities of GPS/GNSS stations in the Network of the Americas (NOTA) near the epicenter of the March 31, 2020 Stanley, Idaho earthquake. Pink scale bar in the lower left is 25 mm/yr....Read more » -
Figure 6. Borehole seismic data from the March 31, 2020 Stanley, Idaho earthquake for the NOTA borehole geophysics array in Yellowstone, about 400 km from the earthquake epicenter. All seismic traces are scaled...Read more » -
Figure 7. Borehole seismic data from the March 31, 2020 Stanley, Idaho earthquake for the NOTA borehole geophysics array in Yellowstone, about 400 km from the earthquake epicenter. All seismic traces are presented on...Read more » -
Figure 8. Borehole seismic data from the March 31, 2020 Stanley, Idaho earthquake for the NOTA borehole geophysics array along the Pacific Northwest coast. All seismic traces are scaled independently. (Figure by...Read more » -
Figure 9. Borehole seismic data from the March 31, 2020 Stanley, Idaho earthquake for the NOTA borehole geophysics array in the Pacific Northwest coast. All seismic traces are scaled independently. (Figure by Elizabeth...Read more » -
Figure 10. Borehole seismic data from the March 31, 2020 Stanley, Idaho earthquake for representative stations from various NOTA borehole geophysics arrays along the U.S. west coast. All seismic traces are scaled...Read more »
GAGE Data and Support
- Please contact archive-gps
unavco.org for information on data availability. - To request access to these and other RT-GPS stations operated by UNAVCO please send an email request to rtgpsunavco.org.
- For information on past event responses, see the UNAVCO Geophysical Event Response page.
Acknowledgements
These data are provided by the GAGE Facility, operated by UNAVCO, Inc., with support from the National Science Foundation and the National Aeronautics and Space Administration under NSF Cooperative Agreement EAR-1724794. The Network of the Americas (NOTA) is a core component of the NSF GAGE Facility. To acknowledge use of these data please follow the acknowledgment guidelines.
High-resolution Figures
- GPS/GNSS station download map (Figure 1)
- Real-time GNSS results (Figure 2)
- Dynamic strain, B208 (Figure 3)
- Dynamic strain, B944 (Figure 4)
- Borehole seismic data, Yellowstone array (Figure 6)
- Borehole seismic data, Yellowstone array, same scale (Figure 7)
- Borehole seismic data, Pacific Northwest coastal array (Figure 8)
- Borehole seismic data, Pacific Northwest array (Figure 9)
- Borehole seismic data, various arrays along the U.S. west coast (Figure 10)
Related Links
- UNAVCO Geophysical Event Response page
- USGS event page
- Idaho Geological Survey event page
- EERI Stanley, Idaho Earthquake Clearinghouse
- Network of the Americas
- UNAVCO GPS Velocity Viewer
Map Center:
Challis, Idaho
Last modified: 2020-04-28 13:24:10 America/Denver
2020