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Event Name: Nisqually, Washington Earthquake
Event Date: 02/28/2001, 18:54 UTC, (10:54 AM PST)
Event Identification: 20010228_1
Recorder Type: ETNA, K2, MT WHITNEY, SMA-1
Data Organization and Format || Downloads (updated 05/11/2001) || Tables (updated 05/11/2001) || Maps ||
Pictures (updated 03/20/2001) || Errata (posted 03/29/2001; updated 05/11/2001) || Links
The February 28, 2001, 18:54 UTC Mw 6.8 Nisqually, Washington Earthquake data recorded by the USGS National Strong-Motion Network (NSMN) are available via the NSMP ftp server in the folder (directory) "20010228_1" (https://ca.water.usgs.gov/nsmp/20010228_1). 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.
In a departure from previous file-naming conventions (where for a particular channel the different the time series data all had the same filename, and thus required separate directories for each data type), the file names for the 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), '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.
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 "20010228_1/" on the NSMP ftp server, "https://ca.water.usgs.gov/nsmp/20010228_1".
20010228 Nisqually Earthquake Downloads in ".zip" format |
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| 20010228_1_uncorr.zip | uncorrected (6.7 Mb; uncompresses to 20.5 Mb; posted 03/05/2001; updated 05/11/2001) |
| 20010228_1_corr.zip | corrected (29.6 Mb; uncompresses to 85.6 Mb; posted 03/05/2001; updated 05/11/2001) |
List of corrected peak ground accelerations and velocities for available time-series data updated 05/11/2001 (to obtain list as Excel spreadsheet click here )
NSMP National Strong-Motion Network (NSMN) recorders in Washington State (all recorders)
Pictures of damage at U.S. Army Corps of Engineers Howard Hansen Dam (updated 03/15/2001)
Pictures of damage at Olympia, Washington (posted 03/16/2001)
Pictures of damage at Seattle, Washington (posted 03/20/2001)
Errata list (posted 03/29/2001; updated 05/11/2001)
USGS Earthquake Hazards Program Home Page for February 28, 2001, Mw 6.8 Nisqually Earthquake
COSMOS Virtual Data Center Nisqually Earthquake Page
University of Washington Nisqually Earthquake Home Page
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This page was last updated on February 25, 2009.
