![]() ![]() (Analysis and image/Min Wang & Jianbao Sun, Institute of Geology, China Earthquake Administration. Data are from the ESA Sentinel-1 satellite. The same InSAR image as in Figure 27, with data wrapped. See figures for examples of signals recorded by the BSM network.įigure 28. These datasets can be downloaded from the UNAVCO borehole strainmeter event response page. ![]() The Kalman filter offset solution will be included in the master offset file.įully processed 1-sps borehole strainmeter (BSM) datasets for both of these events have been produced. The final event file will be added to the event data products ftp site. 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. Preliminary “rapid” offsets have been tabulated and published in an event (*.EVT) file available from the UNAVCO event data products ftp site. These data will soon be available in RINEX format from the UNAVCO high rate data ftp site.Ĭoseismic offsets from this event have been estimated by the GAGE GNSS Analysis Centers (Figure 20). A map of downloaded stations is provided in Figure 4. NOTA GPS/GNSS High Rate Data for Post Processingįor the M6.4 event, high-rate 5-sps (5 Hz) data are being downloaded from 200+ NOTA stations within ~250 km of the epicenter for a 3-hour time window around the event (± 1.5 hours), as well as 1-sps (1 Hz) data for a 3-day time window (± 1.5 days).įor the M7.1 event, high-rate 5-sps (5 Hz) data are being downloaded from 700+ NOTA stations within 1,000 km of the epiecenter for a 3-hour time window around the event (± 1.5 hours), as well as 1-sps (1 Hz) data for a 1-day time window (continuing from the 3-day window from the M6.4 download). Note: Figures and findings are preliminary and subject to revision. This GNSS data-only magnitude underestimated the final known magnitude, but was more accurate than the preliminary seismic data-only estimate of M6.2 at 30 seconds after origin time. Using inversions from stations out to 200 km of the epicenter, a “geodetic” magnitude of M 6.9 was estimated within 30 seconds of the earthquake occurring. The next closest site (CCCC) recorded a PGD of 354 mm, similar to the projected value of 360mm. This GNSS-only magnitude only slightly underestimated the final known magnitude.įor the M7.1 event, the nearest station (P595) recorded a PGD of 697 mm, much larger than the projected value of ~410 mm. Using inversions from stations out to 100 km of the epicenter, a “geodetic” magnitude of M6.3 was estimated within 30 seconds of the earthquake occurring. These data allowed peak ground displacements (PGDs) to be calculated automatically from the displacement traces within seconds of the earthquake, as the surface waves propagated away from the epicenter.įor the M6.4 event, the nearest station (P595) recorded a PGD of 113 mm. 17:33:49 (UTC)ē5.705°N 117.506°W 10.7 km depthĭynamic displacement signals from these earthquakes were recorded by NOTA GNSS stations streaming high-rate (1-sps / 1 Hz) data in real time. This response covers two related felt events:
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