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September 8, 2017 M8.1 Earthquake 87km SW of Pijijiapan, Mexico Data Event Response

Written by David Phillips & Beth Bartel
8 September 2017

Event Summary

A Mw 8.1 earthquake occurred at 04:49:21 UTC (11:49:21 pm 7/9 local) on September 8, 2017, 87km SW of Pijijiapan, Mexico. For more information, see the USGS Earthquake Hazards Program event page.

UNAVCO Response

GPS Data
In response to the M8.1 earthquake 87km SW of Pijijiapan, Mexico, on 2017-09-08, UNAVCO and UNAM-Geofisica have initiated the acquisition of high-rate (1 Hz and/or 5 Hz) GPS/GNSS data from stations within ~1200 km of the epicenter. A map of potentially available high rate GPS/GNSS stations is shown in Figure 2; please note that actual availability of high rate data will depend on the status of each station, TBD. Some of these stations provide high rate data on a regular basis; any currently available high rate data can be downloaded now from the UNAVCO ftp site either directly (ftp://data-out.unavco.org/pub/highrate/) or via the UNAVCO Data Archive Interface (DAI).

Tom Herring (MIT), the GAGE GPS Analysis Center Coordinator (ACC), has estimated preliminary coseismic offsets associated with the M8.1 Pijijiapan, Mexico earthquake. Individual station offsets are tabulated in a “rapid" event (*.EVT) file available from the UNAVCO ftp site [ftp://data-out.unavco.org/pub/products/event/
]. The horizontal displacements in this event file are plotted in Figure 12. As more data become available, the ACC will also produce a “final” offset solution as well as offsets estimated from Kalman filter time series analyses. Final and Kalman filter offset files will be added to the event file ftp site: ftp://data-out.unavco.org/pub/products/event.

Borehole Strainmeter Data
UNAVCO has produced a fully processed 1-sps borehole strainmeter (BSM) dataset spanning the time period of this event, available from the PBO borehole strainmeter event response page under 20170908_Mexico.

Details regarding available high rate GPS/GNSS data, as well as other data products, will be updated here as this data response evolves.

UNAVCO 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.

Related Links

Map Center:
Pijijiapan, Mexico


Last modified: 2020-01-28  22:54:36  America/Denver