Document: NUREG-0800
Document ID: 5ca9b636-f855-4e9d-ae73-9b7aca9c638c
Document Type: srp
Title: Seismicity. 4-n-a meettng the requirement? ef
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0423/ML042390209.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.5.2.1
CFR Part: 
CFR Title: 

Content:
i 11 Reference 1, this subsection is accepted when the complete historical record 12 of earthquakes in the region is listed and when all available parameters are 13 given for each earthquake in the historical record. The listing should 14 include all earthquakes having Modified Mercalli Intensity (MMI) greater than 15 or equal to IV or magnitude greater than or equal to 3.0 that have been 16 reported in all tectonic provinces , any parts of which 17 are within p7 (200 miles) of the site. A regional7scale map should be 18 presented showing all listed earthquake epicenters and should be supplemented 19 by a larger-scale map showing earthquake epicenters of all known events within 20 (50 miles) of the site. The following information concerning each 21 earthquake is required whenever it is available: epicenter coordinates, depth 22 of focus, date, origin time, highest intensity, magnitude, seismic moment, 23 source mechanism, source dimensions, distance from the site, and any strong- 24 motion recordings (sources from which the information was obtained should be 25 identified). All magnitude designations such as mh, M,, M., M. should be 26 identified. 27 28 ___ 29 30 34-and--S ). In addition, any reported earthquake-induced geologic 31 failure, such as liquefactionn 32 , landsliding, landspreading, and lurching should be 33 described completely, including the estimated level of strong motion that 34 induced failure and the physical properties of the materials. The 35 completeness of the earthquake history of the region is determined by 36 comparison to published sources of information (e.g., Refs. 9 through 13). 2.5.2-5 1 When conflicting descriptions of individual earthquakes are found in the J 2 published references, the staff should determine which is appropriate for 3 licensing decisions. 4