Data Event Response to the May 15, 2020 M 6.5 Monte Cristo Range Earthquake
Written by Kathleen Hodgkinson, Dave Mencin, & Beth Bartel
Originally posted 20 May 2020
Last updated 26 May 2020
Event Summary
A magnitude 6.5 earthquake occurred at 11:03:27 UTC (04:03:27 local) on May 15, 2020, 56 km west of Tonopah, Nevada. 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 has downloaded high-rate 1- and 5-sps (1 and 5 Hz) data from all NOTA GPS/GNSS stations within 200 km of the epicenter. Two days of 20-Hz postseismic data were collected from stations P132, P133, P627 and P649. These data are available in RINEX format from the UNAVCO high-rate data ftp site.
GAGE GPS/GNSS Displacement Estimates
The GAGE GNSS Analysis Center (MIT) has calculated coseismic offsets for stations in the area (Figure 8). Observed offsets are available in the event file.
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 Figure 3 for an example 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. These data will be available for post processing from the UNAVCO high-rate data ftp site. Stations...Read more » -
Figure 2. Horizontal displacements calculated from real-time position solutions from the NOTA GNSS network. Dashed vertical line shows event origin time. Blue dots show the predicted P-wave arrival time and red dots...Read more » -
Figure 3. The figure shows the maximum horizontal ground displacements recorded by NOTA real-time GNSS displacements. The green line shows the magnitude estimated from a simultaneous inversion of the GNSS measurements....Read more » -
Figure 4. Dynamic strain for 13 NOTA borehole strainmeters. Magnitude estimate is based on the strain-magnitude relationship developed by Andy Barbour at the USGS. (Figure by Michael Gottlieb, UNAVCO)...Read more » -
Figure 5. Borehole seismic data from the NOTA borehole geophysics network. (Figure by Wade Johnson, UNAVCO)...Read more » -
Figure 6. Long-term tectonic velocities of GPS/GNSS stations in the Network of the Americas (NOTA) near the earthquake epicenter (yellow star, approximate location from USGS). Pink scale bar in the lower left is 25...Read more » -
Figure 7. Preliminary coseismic displacements from GPS stations in the MAGNET network (Univeristy of Nevada-Reno) and NOTA. MAGNET stations are the red triangles, NOTA and other continuous are in blue. MAGNET station...Read more » -
Figure 8. Coseismic offsets of NOTA GNSS stations as calculated by the GAGE GNSS Analysis Center (MIT). (Figure by Christine Puskas, UNAVCO)...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)
- Magnitude estimate based on GPS/GNSS maximum displacements (Figure 3)
- Dynamic strain and magnitude estimate (Figure 4)
- Borehole seismic data (Figure 5)
- Early offset estimates from UNR (Figure 7)
- Coseismic offsets of NOTA GNSS stations from the GAGE Analysis Center (Figure 8)
Related Links
- UNAVCO Geophysical Event Response page
- USGS event page
- Nevada Seismological Laboratory event page
- University of Nevada - Reno MAGNET data
- Nevada Geodetic Laboratory (UNR)
- Network of the Americas
- UNAVCO GPS Velocity Viewer
Map Center:
Tonopah, Nevada
Last modified: 2020-06-29 11:25:10 America/Denver