Virtual Earthquake Reconnaissance Team (VERT) Summary by Ashley Morales.
The main shock of the September 3rd earthquake occurred at 12:02:44 UTC (07:02:44 -05:00 at epicenter) about 15 km to the northwest of Pawnee (36.425°N 96.929°W) at a depth of 5.56 km. The Center for Engineering Strong Motion Data (CESMD) made available on their website records from 10 stations in Oklahoma. The closest free-field station was located 42.8 km from the epicenter and recorded a maximum horizontal acceleration of 0.066 g. The highest acceleration (from the available records) was recorded in the USGS OK091 Station (about 52 km from the epicenter) and it was 0.081 g, the spectral acceleration (Sa) presents the higher peaks at very short periods of 0.12 – 0.15 s. Both records are shown below.
Figure 1. USGS Station Ok033 Mehan, OK. (Source: CESMD)
Figure 2. USGS Station Ok091 Cushing, OK. (Source: CESMD)
There are available weak motion records from the Department of Water Resources from Sacramento, CA –> Sacramento DWR Motion Records
Thanks to Jim Agnew, Sr. Seismologist from the DWR for sharing these records with the EQ Clearing House team.
Sources:
Map of Strong Motion Stations for Pawnee Oklahoma Earthquake of 03 Sep 2016. (n.d.). Retrieved September 15, 2016, from http://strongmotioncenter.org/cgi-bin/CESMD/iqrStationMap.pl?ID=PawneeOklahoma_03Sep2016_us10006jxs
M5.8 – 14km NW of Pawnee, Oklahoma. (n.d.). Retrieved September 20, 2016, from http://earthquake.usgs.gov/earthquakes/eventpage/us10006jxs#executive
