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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.

NOTA GPS/GNSS High-Rate Data for Post Processing
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.

NOTA Borehole Strainmeter Data
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.

GAGE Data and Support

  • Please contact archive-gpsunavco.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.


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

Related Links

Map Center:
Tonopah, Nevada


Last modified: 2020-06-29  11:25:10  America/Denver