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Event Name: Concord, New Hampshire Earthquake
Event Date: 09/26/2010, 03:28 UTC (09/25/2010, 11:28 PM EDT)
Event Identification: 20100926_0328
Recorder Type: Kinemetrics: Etna
Network Event ID#: ne00001198
Data Organization and Format || Download || Tables
The May 16, 2010, 05:16 UTC, mbLg 3.1, Concord, New Hampshire Earthquake data recorded by the USGS National Strong-Motion Project (NSMP) are available via the NSMP ftp server in the folder (directory) "20100926_0328" (https://ca.water.usgs.gov/nsmp/20100926_0328). The time series provided are available in uncorrected acceleration, corrected acceleration, corrected velocity, corrected displacement, response spectra (relative displacement, relative velocity, pseudo-velocity, and absolute acceleration), and Fourier amplitude spectra of corrected acceleration. All of the data are in SMC format.
PRSMP data for this event use the following file-naming convention:
| uncorrected acceleration: | S.N.C.L_u.smc |
| corrected acceleration: | S.N.C.L_a.smc |
| corrected velocity: | S.N.C.L_v.smc |
| corrected displacement | S.N.C.L_d.smc |
| response spectra: | S.N.C.L_r.rs2 |
| Fourier amplitude spectra (f): | S.N.C.L_f.fs1 |
S = Station code
N = Network Code
C = SEED channel
L = Location code, '--' for all channels
USGS data have the following form:
| uncorrected acceleration: | RRRRc_u.smc |
| corrected acceleration: | RRRRc_a.smc |
| corrected velocity: | RRRRc_v.smc |
| corrected displacement | RRRRc_d.smc |
| response spectra: | RRRRc_r.rs2 |
| Fourier amplitude spectra (f): | RRRRc_f.fs1 |
where 'RRRR' is the four-digit recorder serial number (including leading 0's) for the USGS data, 'c' is the channel number of the recorder ('a' corresponds to channel 1, 'b' to channel 2 , etc), the '_x' is used to identify the data type, and the suffix refers to the data format (rs2 and fs1 are valid SMC format types recognized by the BAP processing program.
The data are stored in two directories: uncorrected (only uncorrected acceleration) and corrected (all of the corrected and processed data, including acceleration, velocity, displacement, response spectra and Fourier amplitude spectra. This convention for organizing the data was implemented to avoid confusion between the directory names (Vol1, Vol2, … Vol6) previously used for some earlier events and the standard conventions for Volume1, Volume2 and Volume 3 processing.
Information on how the data are processed can be found in the section on DATA PROCESSING. Note that these data were processed using an acausal Butterworth locut filter.
To facilitate downloading the data, the data have been compressed into PC compatible ".zip" format. The same zip file is located in the "zips" folder in "20100926_0328/" on the NSMP ftp server, "https://ca.water.usgs.gov/nsmp/20100926_0328". Additional data will be added as they are processed. (Updated 05/21/2010)
20100926 03:28 UTC Concord, New Hampshire Earthquake Downloads in ".zip" format |
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| 20100926_0328_uncorr.zip | uncorrected (32 KB; uncompresses to 269 KB) |
| 20100926_0328_corr.zip | corrected (0.4 MB; uncompresses to 1.2 MB) |
List of corrected peak ground accelerations and velocities and pseudo-spectral accelerations for available time-series data, (to obtain list as Excel spreadsheet click here ; click cancel button if get pop-up window requesting user name and password.
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This page was posted on October 01, 2010.