Electronic Supplement to
An Efficient Algorithm to Identify Strong-Velocity Pulses in Multicomponent Ground Motions
by Shrey K. Shahi and Jack W. Baker
The supplementary information here includes a table listing all the pulse-like ground motions identified in the NGA-West2 database, along with summary information for each ground motion. The source-to-site geometry, the recorded time history, extracted pulse, and other directivity parameters for each identified pulse is presented as linked web pages.
Tables
Table S1. List of pulse-like ground motions identified in the NGA-West2 database.
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Columns 1 through 7 correspond to fields in the NGA-West 2 flatfile, and are simply repeated here to aid in interpreting the results.
- Tp is the period of the extracted pulse in the direction of the strongest observed pulse.
- PGV is the peak ground velocity of the original ground motion in the direction of the strongest observed pulse.
- Orientation (° with regard to [w.r.t.] North) is the orientation of the strongest observed pulse, in degrees clockwise from north. For cases in which the as-recorded orientation is not available, this field takes value −999.
- Orientation (° w.r.t. Fault Parallel) is the smallest angle in degrees between the local fault parallel orientation and the orientation of the strongest observed pulse. For cases where the as-recorded orientation or fault orientation is not available, this field takes value −999.
- Fault Normal Pulse indicates whether the ground motion in the fault normal direction is classified as pulse-like. This field takes a value of 1 if the fault-normal motion is pulse-like, 0 if it is not pulse-like, and −999 if the as-recorded orientation or fault orientation is not available (and thus the fault-normal direction could not be determined).
- Directivity Effect indicates if the authors believe the pulse was caused due to directivity effect (1) or due to some other cause (0). For comments explaining some classifications, see the summary pages.
Table S2. Pulse-like Records. Table contains the summary of pulses and links to pages with individual pulse details. Each of these pages, named ####.html, contains information about the ground motion with NGA-West2 record sequence number ####.
Figures
Figure S1. Distribution of earthquake magnitudes for the pulse-like and non-pulse-like records used to fit the final classification boundary.
Figure S2. Distribution of the closest distance between the rupture and the site for the pulse-like and non-pulse-like records used to fit the final classification boundary.
Figure S3. Distribution of the peak ground velocity (PGV) for the pulse-like and the non-pulse-like records used to fit the final classification boundary.
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