September 19, 2017 M7.1 Earthquake 5km ENE of Raboso, Mexico Data Event Response

Written by David Phillips & Beth Bartel
20 September 2017

Event Summary

A Mw 7.1 earthquake occurred at 18:14:39 UTC (13:14:39 pm Sept. 19 local) on September 19, 2017, 5km ENE of Raboso, Mexico. For more information, see the USGS Earthquake Hazards Program event page.

UNAVCO Response

GPS Data
In response to the M7.1 earthquake 5km ENE of Raboso, Mexico on 2017-09-19 at 18:14:39 UTC, UNAVCO and UNAM-Geofisica have initiated the acquisition of high-rate (1 Hz and/or 5 Hz) GPS/GNSS data from stations within ~1000 km of the epicenter. One-sample-per-second (1-sps or 1 Hz) data from available GPS stations will be downloaded for a 7-day period around the event (day of event ± 3 days). Five-sps (5 Hz) data are being downloaded for the 24 hour period around the event (± 12 hours). A map of potential GPS stations being downloaded 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 M7.1 Puebla, 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/pbo_170919_1815_
eq41_coseis_rapid.evt]. The horizontal displacements in this event file are plotted in Figure 5. As more data and final orbits 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.

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

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 or directly under 20170919_Mexico.